| Entries |
| Document | Title | Date |
|---|
| 20080224555 | Method and Device For Controlling a Magnetic Bearing - A detection device ( | 09-18-2008 |
| 20080224556 | METHODS OF CONTROLLING THE INSTABILITY IN FLUID FILM BEARINGS - A method of controlling the instability in fluid film bearings by using a magnetic bearing in combination with a fluid film bearing (whether it is a cylindrical journal bearing, an elliptic bearing, an offset-half bearing, a multi-lobe bearing, foil bearing or a tilting-pad bearing, does not really matter), wherein the fluid film bearing serves as the primary load carrying bearing and the magnetic bearing controls the instability of the fluid film bearing. This efficient combination results in bearings that can be used at high speeds without having neither stability nor reliability problems. An alternative method of controlling the instability in fluid film bearings is to disturb the flow in the axial direction, for example, a sleeve (journal) bearing can be manufactured such that the bearing axis is skewed with the shaft axis or a variable geometry bearing can be manufactured to allow for bearing angular misalignment. | 09-18-2008 |
| 20080231128 | Magnetic Bearing Device With an Improved Vacuum Feedthrough - A magnetic bearing device ( | 09-25-2008 |
| 20080231129 | Spindle apparatus - In a spindle apparatus for a machine tool, a spindle is supported on a housing by support-purpose bearing devices, and is rotated by an electric motor, and a tool is attached to a tool attaching portion formed at a distal end of the spindle. A radial magnetic bearing for vibration suppressing purposes which includes a plurality of electromagnets is provided around the tool attaching portion of the spindle. A plurality of radial displacement sensors for detecting a displacement of the tool attaching portion in radial directions are provided around the tool attaching portion. There is provided an electromagnet control unit for controlling the electromagnets of the radial magnetic bearing on the basis of outputs of the radial displacement sensors so as to support the tool attaching portion in a predetermined position. | 09-25-2008 |
| 20080231130 | Magnetic Repulsion Type Bearing - A magnetic repulsion type bearing includes a plurality of induction iron pieces, a stator, a rotor, an outer casing, an inner casing and a current controlling device. The rotor is disposed inside the stator, and the iron pieces of the rotor and the iron pieces of the stator are arranged in an alternate manner so that the rotor may be fixedly held in the stator through the magnetic repulsion between them. Also, the outer casing and the inner casing enclose the rotor and the stator so as to shield the electromagnetic force. In addition, the current controlling device may be used to control the amount of current and the direction of the current flow so as to control the strength of the electromagnetic force and the polarity. | 09-25-2008 |
| 20080238230 | MOTOR - A motor includes a shaft that serves as a rotation center when a rotor is rotated with respect to a stator, a bearing that supports the shaft in a circumferential direction of the shaft, a thrust bearing that supports one end of the shaft in a thrust direction of the shaft, a magnet that is fixed to the rotor and alternately magnetized to different poles in a rotational direction of the shaft, a core that is fixed to the stator and disposed to face the magnet in a radial direction of the shaft, a coil that are wound around the core, and a magnetic shield that shields leakage flux leaking from the magnet to the coil. A magnetic center of the core is offset from a magnetic center of the magnet in the thrust direction, so that the shaft is attracted to the thrust bearing. | 10-02-2008 |
| 20080246358 | Magnetic bearing spindle device for machine tool - The control device displaces the main shaft in the axial direction and in the radial direction within the range of the gap between the rib member of the main shaft and the axial magnetic bearing and the gap between the main shaft and the radial magnetic bearings, by controlling the attraction forces of the axial electromagnets and the radial electromagnets, whereby the main shaft can be positioned. By controlling the axial magnetic. bearing and the radial magnetic bearings, it becomes possible to freely displace only the main shaft in the axial direction and in the radial direction, and therefore, the main shaft can be positioned at high speed and with high precision. Moreover, there is no necessity of providing the feeding mechanism in which the ball screw mechanism and linear motor etc. are employed for the purpose of displacing the magnetic bearing spindle device, and hence, reduction of the production cost for the grinding apparatus can be achieved. | 10-09-2008 |
| 20080252161 | Magnetic bearing device and magnetic bearing spindle device - A control device includes a differential amplifying circuit for obtaining a difference between values of exciting currents (exciting voltage values) supplied to a pair of axial electromagnets and a pair of radial electromagnets, multiplying the obtained difference by coefficient times, and outputting it as the bearing load in an axial direction and a radial direction. The exciting current includes steady current supplied to the axial electromagnets and the radial electromagnets and control current which varies by the displacement of a main shaft. By supplying the steady current to the axial electromagnets and the radial electromagnets, the magnetic attraction force of the axial electromagnets and the radial electromagnets having non-linearity is linearly approximated. Accordingly, the difference between the values of the exciting currents (exciting voltages) supplied to a pair of electromagnets is obtained and is multiplied by coefficient times, thereby obtaining a value corresponding to the bearing load. | 10-16-2008 |
| 20080252162 | PASSIVE MAGNETIC BEARING CONFIGURATIONS - A journal bearing provides vertical and radial stability to a rotor of a passive magnetic bearing system when the rotor is not rotating and when it is rotating. In the passive magnetic bearing system, the rotor has a vertical axis of rotation. Without the journal bearing, the rotor is vertically and radially unstable when stationary, and is vertically stable and radially unstable when rotating. | 10-16-2008 |
| 20080265704 | Magnetic Bearing Device With Simplified Wiring - A magnetic hearing device and a method of operation for such a device are provided. The device comprises a group ( | 10-30-2008 |
| 20080309184 | Support device for supporting a rotor for rotation - A support device for rotatably supporting a rotor ( | 12-18-2008 |
| 20080309185 | Permanent magnet motor having an axially magnetized pull magnet - A permanent magnet motor having an axially magnetized pull magnet consisting of a baseplate on which a stator lamination stack having stator windings is disposed, wherein a hub is disposed opposite the baseplate, the hub being connected to a shaft that is supported with respect to a bearing bush via one or more fluid bearings wherein the hub carries at least one annular rotor magnet that lies radially opposite the stator lamination stack, wherein a pulling device acting in an axial direction and operating under the influence of magnetic tensile forces is disposed in the region between the hub and the stationary part of the motor, wherein the pulling device consists of a permanent magnetic pull magnet on the side of the rotor that interacts magnetically with surfaces on the side of the stator | 12-18-2008 |
| 20090001830 | CALIBRATION OF A GENERATOR DEVICE - Methods are provided for calibrating a tachometer or generator device to reduce residual errors associated with the tachometer-generator device. A shim structure is positioned within the air gap of the tachometer-generator device. A physical characteristic or location of placement of the shim structure is selected to reduce variation in an output voltage of the tachometer-generator device. | 01-01-2009 |
| 20090009017 | Bearing apparatus and centrifugal compressor provided with same - A bearing apparatus include a rotor having a flange portion, a foil bearing for supporting the rotor in a radial direction, and a magnetic bearing for supporting the rotor in an axial direction by an electromagnet, and a control portion for controlling electric current supplied to the electromagnet. The control portion controls such that a first electric current is supplied to the electromagnet so as to cause the electromagnet to attract the flange portion so as to support the rotor in the axial direction. The control portion also controls such that when the number of revolutions of the rotor is smaller than the number (R | 01-08-2009 |
| 20090009018 | Magnetic bearing unit - Displacement data of axial position targets measured by axial displacement sensors is transmitted to a first main spindle elongation computation section, which then computes elongation of a main spindle between the axial position targets. The computation result is transmitted to a second main spindle elongation computation section, which then computes elongation of the main spindle between one of the axial position targets provided on the side of a tool and the tool. The computation result is transmitted to an axial position control section. The axial position control section changes the power to be supplied to axial magnetic bearing parts, thereby controlling the axial position of the main spindle so that the axial position of the tool becomes constant. | 01-08-2009 |
| 20090033165 | Magnetic Levitation Actuator - A rotating shaft is accommodated in a case. A ferromagnetic portion is formed on the rotating shaft, and electromagnets are provided to the case. Many projecting portions are formed so as to be arranged in a direction along which the movement of the rotating shaft is required to be regulated. Furthermore, Many projecting portions are likewise formed on the ferromagnetic portion. According to this construction, magnetic flux occurring in the electromagnets concentrates, so that restoring force occurs in the axial direction with suppressing reduction of the attractive force in a radial direction to the ferromagnetic portion. Therefore, the movement in the axial direction of the rotating shaft can be regulated. | 02-05-2009 |
| 20090072644 | THRUST MAGNETIC BEARING SYSTEM - A thrust magnetic bearing system separates magnetic circuits of electromagnets from those of permanent magnets so that each permanent magnet produces a bias magnetic field while each electromagnet functions only to control the position of a rotating body, thereby achieving desired displacement and current stiffness without flowing a bias current through the electromagnet. The magnetic bearing system includes a thrust displacement sensor and a thrust magnetic bearing to float a disk floating body based on displacement information detected through the displacement sensor. The magnetic bearing includes a donut permanent magnet, a pair of electromagnets connected in series to form an inductor at both sides of the donut permanent magnet, and a pair of magnetic poles provided opposite each other outside the pair of electromagnets. The magnetic bearing floats the floating body through a bias magnetic flux generated by the permanent magnet and a control magnetic flux generated by the electromagnets. | 03-19-2009 |
| 20090079284 | Hybrid Magnetic Bearing - In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. | 03-26-2009 |
| 20090096302 | MAGNETIC BEARING DEVICE AND METHOD - An energy-saving magnetic bearing device with no bias current for making the relation between the excitation current and the magnetic force of the electromagnet linear is provided. In a magnetic bearing device for supporting a rotor | 04-16-2009 |
| 20090096303 | MOTOR PROVIDED WITH CHUCKING DEVICE AND DISK DRIVING DEVICE EQUIPPED WITH THE MOTOR - A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core. | 04-16-2009 |
| 20090108692 | Laying Head with a Vibration Damping Device - A laying head for forming coils using continuous and substantially rectilinear rolled products such as rods or wire, having vibration damping means integrated in one of two rotor supports ( | 04-30-2009 |
| 20090121571 | MAGNETIC LEVITATION MOTOR AND PUMP - A magnetic levitation motor including a stator having magnetic bearing units and a motor unit, and a rotor provided to the stator. And the occurrence of an eddy current at a magnetic bearing is suppressed and the rotation loss of the rotor can be reduced, and also to provide a pump using such the magnetic levitation motor. | 05-14-2009 |
| 20090127956 | MOTOR BUILT-IN MAGNETIC BEARING DEVICE - The device includes a rolling bearing unit supporting a radial load and a magnetic bearing unit supporting an axial load and/or a bearing preload; an electromagnet fitted to a spindle housing so as to confront, on a non-contact basis, a flange shaped thrust plate mounted on a main shaft; a motor rotor of a motor for driving the shaft, and a motor stator opposed to the rotor, the shaft being driven by magnetic or Lorentz forces developed between the rotor and the stator; and a sensor detecting an axial force acting on the bearing unit, and a controller controlling the electromagnet. In this device, the stiffness of a composite spring formed by the bearing unit and a support system for the bearing unit is chosen to be higher than the negative stiffness of a composite spring of a motor part comprised of the electromagnet and the motor. | 05-21-2009 |
| 20090134727 | Method for Operating an Electromotive Drive - A method for operating an electromotive drive of a textile machine, comprising a contactlessly mounted rotor and catch bearings. The rotor rests on one catch bearing prior to initial operation, and is spaced therefrom by an air gap during stationary operation. A control device allows the rotor to be held in a force-free floating state during stationary operation. The method executes the following steps: (a) inputting an output signal from the control device for maintaining the force-free floating state during operation; (b) calculating the air gap by evaluating the output signal; (c) comparing the calculated value with predetermined limit values; and (d) deactuating the drive when the limit values are passed. The control device comprises a position sensor with at least one sensor coil, at least one actuator coil, a position controller and an integrator, at which the output signal is obtained to determine the air gap. | 05-28-2009 |
| 20090146515 | Magnetic axial bearing and a spindle motor having this kind of magnetic axial bearing - The invention relates to a magnetic axial bearing for taking up axial forces that act on a rotor component that is rotatably supported about a rotational axis with respect to a stator component. The bearing comprises a first bearing part consisting of at least one permanent magnet and at least two flux guide elements associated with the permanent magnet that are disposed on opposing end faces of the permanent magnet and aligned substantially radial and perpendicular to the rotational axis, and a second bearing part consisting of at least two flux guide elements that are disposed at a mutual spacing to one another and aligned substantially radial and perpendicular to the rotational axis, each flux guide element of the second bearing part being associated with a flux guide element of the first bearing part and lying directly opposite the latter in a radial direction and separated from it by an air gap. The invention further describes a spindle motor having a magnetic axial bearing of this kind, used, for example, for driving a hard disk drive. | 06-11-2009 |
| 20090160279 | Magnetic Levitation System - A magnetic levitation system for supporting an object against gravity by a supporting force includes a permanent-magnet dipole aligned in a vertical position and coupled to the object, a supporting-field generator and a stabilization system. The supporting-field generator generates a supporting force on the permanent-magnet dipole via a supporting field. The supporting field is a two-dimensional or three-dimensional magnetic quadrupole field so that the supporting force is independent of a position of the dipole. The stabilization system constrains the dipole against movements in at least one horizontal direction, and includes a diamagnetic element coupled to the dipole and arranged below the dipole, and a stabilizing-field generator generating a second two-dimensional or three-dimensional stabilizing field to restore said diamagnetic element to a position where the field strength of the stabilizing field has a local minimum. | 06-25-2009 |
| 20090174270 | DEVICE FOR SAFEGUARDING AN UNINTERRUPTIBLE POWER SUPPLY OF A MAGNET BEARING IN THE EVENT OF FAILURE OF AN ELECTRICAL SUPPLY VOLTAGE - The invention relates to a device for safeguarding uninterrupted power supply of a magnetic bearing ( | 07-09-2009 |
| 20090184595 | SYSTEM AND METHOD FOR MAGNETIC LEVITATION WITH TILTED ORIENTATION - A system and method for magnetic levitation with a tilted orientation. In one embodiment, a magnetic levitation base together with a magnetic levitation affecting element that is located to the side of the levitation base support the magnetic levitation of a spinning magnetic top in a tilted orientation. The tilt angle of the levitating magnetic top may be greater than the tilt angle of the levitation base. In one embodiment, the levitation affecting element may comprise one or more magnets similar to that of the levitation base. The mass of the top and the tilt of the levitation base that are required for magnetic levitation may be adjusted by adjusting the levitation affecting element (e.g. altering its position and/or the strength of its magnetic field.) The general direction of the tilt may be reversed by changing the magnetic north-south direction (e.g. turning over or reversing the electromagnetic current) of the levitation affecting element. | 07-23-2009 |
| 20090189469 | MAGNETIC BEARING APPARATUS - A magnetic bearing apparatus supports a rotating object using magnetic levitation by a magnetic force of electromagnets. The magnetic bearing apparatus includes a PWM driver configured to supply exciting currents to the electromagnets, a driver power source configured to drive the PWM driver, and a displacement error signal removing section configured to extract a displacement error signal of the displacement information from a current flowing through the driver power source and to remove the displacement error signal from the displacement information. | 07-30-2009 |
| 20090200883 | Axial Gap Dynamo Electric Machine with Magnetic Bearing - An axial gap electric dynamo machine has a horizontally disposed rotor disk that is stabilized at its periphery by a plurality of permanent magnets connected to a ferromagnetic bearing plate that provides an opposing or repulsive force against the rotor magnets. In some preferred embodiments, the bearing plate magnets are configured in a dual band to further enhance the magnetic field that supports the periphery of the spinning rotor. | 08-13-2009 |
| 20090243413 | ROBOT DRIVE WITH MAGNETIC SPINDLE BEARINGS - A drive section for a substrate transport arm including a frame, at least one stator mounted within the frame, the stator including a first motor section and at least one stator bearing section and a coaxial spindle magnetically supported substantially without contact by the at least one stator bearing section, where each drive shaft of the coaxial spindle includes a rotor, the rotor including a second motor section and at least one rotor bearing section configured to interface with the at least one stator bearing section, wherein the first motor section is configured to interface with the second motor section to effect rotation of the spindle about a predetermined axis and the at least one stator bearing section is configured to effect at least leveling of a substrate transport arm end effector connected to the coaxial spindle through an interaction with the at least one rotor bearing section. | 10-01-2009 |
| 20090261673 | Cooling of a bearing journal - A rotary machine, which can be a turbine or a rotary compressor, is provided. The rotary machine includes a stationary housing and a rotating shaft supported in the housing by a magnetic bearing, whereby the magnetic bearing includes a laminated bearing journal with a shaft-mounted rotating lamination and a corresponding housing-mounted stationary lamination surrounding the rotating lamination, whereby both laminations extend axially to the shaft within a bearing portion, limited on one side by the end of the shaft. In addition, an axial duct extends axially through the shaft from the end to at least one substantially radial duct connecting the axial duct with an orifice in the shaft surface adjacent the other side of the bearing portion, and whereby a stationary tube is inserted in the axial duct supplying it with fluid. This arrangement provides sufficient cooling for a laminated bearing journal of the rotary machine. | 10-22-2009 |
| 20090295244 | Apparatus for Magnetic Bearing of a Rotor Shaft With Radial Guidance and Axial Control - Radial, soft magnetic rotor disk elements which engage in each other and soft magnetic stator disk elements form a magnetic bearing device. The elements are provided with teeth-like extensions which are arranged opposite to each other over an air gap on sides which are oriented towards each other. Magnetic fields, which may be produced by permanent magnets or electromagnets, are assigned to the stator disk elements to produce a magnetic maintaining flow which is oriented in an axial direction between the disk elements for radial adjustment. An electromagnetic winding is also provided in the region of the central plane of the bearing device for axial adjustment, which enables a magnetic control flow, which superimposes the magnetic maintaining flow, to be produced. | 12-03-2009 |
| 20090302698 | ELECTRICAL MACHINE WITH MAGNETIC BEARING AND SAFETY BEARING - In case there is a malfunction of the magnetic bearing in an electrical machine, in which such magnetic bearings drive a rotary shaft in a stator ( | 12-10-2009 |
| 20090302699 | METHOD FOR MOUNTING A BODY - In a magnetic bearing arrangement, support coils are connected in series and can be fed with a current. By coupling a point connecting the two support coils to a voltage source, the support coils can be used as actuating elements and, by feeding the support coils with voltage pulses, the inductance of the support coils can be inferred which is an indication of the position of the body to be mounted. This provides for a position control arrangement. Using one and the same support coils, both a stably controlled load-bearing capacity can thus be produced and at the same time a position sensor can be replaced. | 12-10-2009 |
| 20090309440 | System and Method For Device Suspension and Wireless Power Transmission - A system and method for device suspension and wireless power transmission are disclosed. According to one embodiment, an apparatus, comprises a suspended object having a wireless receiving circuit. A wireless transmission circuit is configured to transmit power to the wireless receiving circuit housed in the suspended object. A magnetic stabilization mechanism is beneath and not in contact with suspended object. A circuit is configured to magnetically control a position of the suspended object. | 12-17-2009 |
| 20090315421 | HYBRID MAGENTIC BEARING - In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. | 12-24-2009 |
| 20090322172 | HYBRID THREE-POLE ACTIVE MAGNETIC BEARING AND METHOD FOR EMBODYING LINEAR MODEL THEREOF - Disclosed are a hybrid three-pole active magnetic bearing and a method for embodying a linear model thereof. The hybrid three-pole active magnetic bearing comprises: a stator including a main-magnetic pole in which three magnetic poles are arranged in a fan-shape at an interval of 120 degrees and the three magnetic poles are wound by a coil respectively and a sub-magnetic pole in which three magnetic poles are arranged in a fan-shape at an interval of 120 degrees and a permanent magnet is provided at peripheral ends of the three magnetic poles respectively; and a rotor enclosing a circumference of the stator, in which the three magnetic poles of the main-magnetic pole and the three magnetic poles of the sub-magnetic pole are alternately located at the same interval, and the sub-magnetic pole further includes a pole shoe is formed as a āUā shape and provided at a peripheral end of the permanent magnet. | 12-31-2009 |
| 20100013332 | MAGNETIC RADIAL BEARING AND MAGNETIC BEARING SYSTEM HAVING A THREE-PHASE CONTROLLER - A magnetic radial bearing and a bearing system for supporting a rotating shaft are disclosed. The bearing has a number of electromagnets circumferentially arranged around a rotating shaft. Each of the electromagnets has a coil which is electrically connected so as to generate both a magnetic bias and a rotating three-phase field. First terminals of opposing coils are connected in common to a corresponding phase of a three-phase controller for generating the rotating field, whereas second terminals of the coils not connected to the same phase are connected at corresponding star points. The star points are connected to DC power for generating the magnetic bias. | 01-21-2010 |
| 20100013333 | MAGNETIC RADIAL BEARING HAVING PERMANENT-MAGNET GENERATED MAGNETIC BIAS, AND A MAGNETIC BEARING SYSTEM HAVING A MAGNETIC RADIAL BEARING OF THIS TYPE - A magnetic radial bearing and a magnetic bearing system for non-contact support of a rotor shaft are disclosed. The magnetic radial bearing for non-contact support of a rotor shaft includes a rotating-field machine stator with a plurality of stator slots distributed in a circumferential direction, and stator teeth with radial ends arranged between adjacent stator slots. The number of stator teeth is equal to the number of stator slots. A three-phase stator winding is wound around the stator slots for producing a rotating magnetic field. An axially extending permanent magnet in form of a strip or plate is arranged at the radial end of each stator tooth, wherein permanent magnets that are adjacently arranged in the circumferential direction have alternating opposing radial magnetization directions. | 01-21-2010 |
| 20100026120 | MAGNETIC CENTRE-FINDING DEVICE WITH NO MAGNET ON THE ROTOR AND WITH SMALL AIR GAP - The present invention relates to a magnetic centre-finding structure, and more particularly a magnetic centre-finding bearing structure intended notably for space applications. The present invention proposes a magnetic concept with no magnet on the rotor, the rotor being reduced to a crown comprising magnetic yokes, to arrange an item of equipment that can be tested on the ground, under gravity, in all positions, without the addition of extra energy, and with a reduction in the complexity of said device. | 02-04-2010 |
| 20100026121 | SUPERCONDUCTING MAGNETIC THRUST BEARING WITH INTEGRATED DYNAMOTOR - In a superconducting magnetic thrust bearing with integrated dynamotor, a first fixed core is formed to have a U-shaped cross-section in a direction of the central axis of the cylindrical shape with an opening of the U-shape being directed perpendicularly to the central axis, and a superconducting coil is arranged on the inside of the U-shaped portion of the first fixed core formed into the U-shape. A rotary core has projecting ends at positions opposite to two projecting ends of the U-shape of the first fixed core, and a magnetic flux guide path, at a position opposite to an armature core, with a shape varying at predetermined intervals in the winding direction of the superconducting coil. The rotary core is constituted such that it rotates relatively to the first fixed core and is able to move in the direction of the central axis of the first fixed core. The armature core is arranged fixedly in a magnetic flux path that introduces a magnetic flux, which is generated from the superconducting coil and led out from one of the two projecting ends of the U-shape of the first fixed core, to the projecting ends of the rotary core, and leads out the magnetic flux from the projecting ends of the rotary core. | 02-04-2010 |
| 20100033046 | ROTATING ELECTRIC MACHINE - A rotating electric machine in which an adequate magnetic supporting force can be produced even when the gap length of the rotator is long. The rotating electric machine comprises a rotator ( | 02-11-2010 |
| 20100072845 | METHOD FOR DETERMINATION OF RESONANT FREQUENCIES OF A ROTOR USING MAGNETIC BEARINGS - The resonant frequencies of a rotor supported on magnetic bearings, in particular a rotor of a turbomolecular vacuum pump, are determined. While the rotor is stationary or the rotor is rotating at a relatively low rotation frequency, mechanical oscillations of the rotor are generated by electromagnets in the magnetic bearing. The rotor oscillations are detected by rotor-position sensors in the magnetic bearing. The resonant frequencies of the rotor are determined from the detected rotor-position oscillations. | 03-25-2010 |
| 20100072846 | MAGNETIC BEARING DEVICE - A magnetic bearing device has a rotating shaft ( | 03-25-2010 |
| 20100109463 | Hybrid Five Axis Magnetic Bearing System Using Axial Passive PM Bearing Magnet Paths and Radial Active Magnetic Bearings with Permanent Magnet Bias and Related Method - An extremely energy efficient, compact, integrated hybrid five axis passive and active magnetic bearing system is developed for suspending a rotor within a non-rotating stator without conventional rolling element or fluid film bearings wherein 1) an axial permanent magnetic set of poles generates a magnetic flux path creating an axial repulsive force which keeps the rotor axially centered in the stator without using a thrust disk or radial thrust faces, 2) two radial electromagnetic bearings generate radial magnetic flux paths which create radial forces which keep the rotor radially centered in the housing, and 3) an integrated axial/radial permanent flux path which provides a bias flux for the radial bearings. | 05-06-2010 |
| 20100127589 | BEARING DEVICE HAVING A SHAFT WHICH IS MOUNTED MAGNETICALLY SUCH THAT IT CAN ROTATE ABOUT AN AXIS WITH RESPECT TO A STATOR, AND HAVING A DAMPING APPARATUS - The invention relates to a bearing device ( | 05-27-2010 |
| 20100133936 | ELECTROMAGNETIC ATTRACTION TYPE MAGNETIC BEARING AND CONTROL METHOD THEREOF - An electromagnetic attraction type magnetic bearing includes at least a pair of electromagnets ( | 06-03-2010 |
| 20100156219 | Advanced Flywheel and Method - A flywheel levitation apparatus and associated method are described for use in a flywheel driven power storage system having a rotor and which provides for an upward vertical movement of the rotor along an axis of rotation. The rotor includes a rotor face defining a cutaway section. A magnetic lifting force is applied to the rotor to at least in part serve in levitating the rotor. The magnetic lifting force exhibits a modified gap sensitivity that is smaller as compared to a conventional gap sensitivity that would be exhibited in an absence of the cutaway section. | 06-24-2010 |
| 20100164315 | PROCESSING APPARATUS - A rotary floater ( | 07-01-2010 |
| 20100181854 | METHOD AND BEARING FOR SUPPORTING ROTATABLE DEVICES, PARTICULARLY A MEDICAL SCANNER - A method is provided for supporting rotatable devices, particularly a medical scanner having an inner ring and an outer ring. According to the invention, the inner ring and outer ring are guided without contact in the axial and/or radial direction by the magnetic field of electromagnets, and the distance between them is monitored and controlled by means of distance sensors. For a bearing implementing said method according to the invention, the outer ring is made in multiple parts and has a U-shaped cross section that is open to the inside in the assembled state, into which the inner ring ( | 07-22-2010 |
| 20100181855 | MAGNETIC BEARING CONTROL DEVICE HAVING A THREE-PHASE CONVERTER, AND USE OF A THREE-PHASE CONVERTER FOR CONTROLLING A MAGNETIC BEARING - The invention relates to a magnetic bearing control device and the use of a three-phase converter for controlling a magnetic bearing. According to the invention, a three-phase converter ( | 07-22-2010 |
| 20100194224 | Magnetic bearing assembly for rotors - A rotor assembly includes a rotor having a central axis extending between the two opposing ends and a radial surface, and is rotatable about the central axis. At least one electromagnet is disposed proximal to and configured to exert magnetic force on a portion of the rotor. Further, a channeling member is disposed generally adjacent to the electromagnet and has a radial surface disposed adjacent to the rotor radial surface. As such, magnetic flux generated by the electromagnet extends generally radially between the electromagnet and the rotor portion and generally axially between the rotor portion and the channeling member so that the magnetic force biases the rotor both radially and axially to maintain the rotor at a desired position. Preferably, the assembly includes a plurality of magnets proximal to each end, two channeling members, and a tubular body extending between the channeling members and enclosing the rotor. | 08-05-2010 |
| 20100194225 | Self Sensing Integrated System and Method for Determining the Position of a Shaft in a Magnetic Bearing - A magnetic bearing system and related method that utilizes self-sensing in order to determine and adjust the position of a shaft within the bearing. Magnetic bearings levitate a rotating object with a magnetic field and are unstable in open-loop operation. Position feedback control is required to maintain a rotor in a centered position. The system and related method uses a unique design to sense the position of the rotating object with greater accuracy. It comprises coils which are used both to detect and adjust the position of the rotating object and a control system which supplies signals in a time-multiplexed manner in order to determine the position with accuracy while still allowing the same coils that are used to detect position to also supply a field to control the position of the rotor. | 08-05-2010 |
| 20100201216 | BEARING DEVICE FOR NON-CONTACTING BEARING OF A ROTOR WITH RESPECT TO A STATOR - The invention relates to a bearing device ( | 08-12-2010 |
| 20100213777 | BODY OF REVOLUTION - The invention relates to a body of revolution, in particular for a centrifugal, which comprises a rotator, an electric motor with a stator and a rotor wherein said latter is fixed to the rotator for rotational movement therewith, a support to which the stator of the electric motor is attached and a bearing unit for rotational arrangement of the rotor around an axis of rotation which comprises at least one bearing adapted to coact with an electromagnetic stabilizer unit in such a way that disturbing forces and/or disturbing vibrations of the rotator are counteracted and/or compensated. | 08-26-2010 |
| 20100231075 | LARGE CAPACITY HOLLOW-TYPE FLYWHEEL ENERGY STORAGE DEVICE - Disclosed is a large capacity hollow-type flywheel energy storage device. The energy storage device includes a hollow shaft, a vacuum chamber receiving the hollow shaft, a flywheel having a predetermined weight and disposed at an inner edge of the vacuum chamber, and a hub connecting the flywheel to the hollow shaft and disposed in the vacuum chamber to be rotatable together with the flywheel. A superconductive bearing and an electromagnet bearing are disposed inside and outside the hollow shaft, respectively, such that magnetic forces thereof can be shielded from each other. Thus, magnetic interference between the superconductive bearing and the electromagnet bearing is shielded by the magnet shield interposed therebetween, thereby preventing rotation loss by stabilizing a structural mechanism during rotation while improving design adaptability. | 09-16-2010 |
| 20100231076 | BEARINGLESS MOTOR - Provided is a bearingless motor capable of stably performing magnetic levitation and rotation even when a thrust disk is not provided and gap length is wide. | 09-16-2010 |
| 20100277020 | HYDROSTATIC BEARING MADE OF MAGNETIC MATERIAL WHICH IS ALSO USED AS A MOTOR MAGNET - A permanent magnet motor is provided with a housing, a rotating shaft supported within the housing, and magnetic coils arranged within the housing. A hydrostatic bearing is disposed on the rotating shaft, the hydrostatic bearing having a permanent magnet incorporated therewith that restricts movement of the rotating shaft in a radial direction. | 11-04-2010 |
| 20100327687 | Systems, Devices, and/or Methods for Managing Magnetic Bearings - Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium storing machine-implementable instructions for, activities that can comprise and/or relate to, via magnetic radial bearings, magnetically levitating a rotating shaft, each of said magnetic radial bearings comprising stator magnet groups, each of said stator magnet groups comprising stator magnets, each of said stator magnet groups operatively adapted to fully support said rotating shaft independently of each other of said stator magnet groups so that the magnetic bearing system continues to operate with the failure of one or more components of the system. | 12-30-2010 |
| 20110001379 | PASSIVE MAGNETIC BEARING - A passive magnetic bearing which has an exceptionally low friction couple. Radial and axial restraint is achieved through magnetic and mechanical means. The embodiment of the passive magnetic bearing has two axially magnetized rings, which each exhibit at least one pair of north and south poles. The magnetized rings are positioned in a manner where the poles are in a repulsive magnetic interaction such that the plane of symmetry which separates the like poles lies perpendicular to the axis of the rotation of a shaft and this radially constrains the movement of the shaft. Axial rigidity is added to the system by the use of ceramic bearings and related axial retaining mechanisms on one of the ring magnets thus maintaining the magnetic bearing in an otherwise unstable axial plane. | 01-06-2011 |
| 20110001380 | PERMANENT MAGNET AND ROTATING BEARING HAVING SUCH PERMANENT MAGNETS - A permanent magnet ( | 01-06-2011 |
| 20110012456 | MAGNETIC BEARING DEVICE AND METHOD - An energy-saving magnetic bearing device with no bias current for making the relation between the excitation current and the magnetic force of the electromagnet linear is provided. In a magnetic bearing device for supporting a rotor | 01-20-2011 |
| 20110025153 | optimised levitation device - Device for levitation of an item over an optimized base by means of permanent magnets. The equilibrium is stable along one or two axes by means of these permanent magnets, and along the one or two others by means of a combination of electromagnets of near zero consumption at equilibrium. | 02-03-2011 |
| 20110025154 | Electric rotary drive - An electric rotary drive is proposed, designed as a bearingless external rotor motor, having a magnetically supported, substantially ring-shaped rotor ( | 02-03-2011 |
| 20110031836 | Rotational machine, method for the determination of a tilting of a rotor of a rotational machine, as well as a processing plant - The invention relates to a rotational machine adapted as a bearing-free engine including a stator ( | 02-10-2011 |
| 20110043063 | ENCAPSULATED MAGNET ASSEMBLY AND PROCESS FOR MAKING - The present invention provides an encapsulated magnet assembly, comprising (a) a magnet disposed within a housing, said housing comprising at least one wall and defining at least one aperture; and (b) a housing cover; the housing cover comprising a first portion made of a magnetic material and a second portion made of a non-magnetic material, wherein the housing cover is configured to hermetically seal said aperture, the first portion being fixedly attached to the second portion wherein a point of attachment is heat treated; and wherein the housing wall is formed of the non-magnetic material and is fixedly attached to the second portion of the housing cover. In one embodiment, the magnet of the encapsulated magnet assembly is a permanent magnet, and in an alternate embodiment an electromagnet. In one embodiment the encapsulated magnet assembly is a component of a stator-rotor assembly. | 02-24-2011 |
| 20110050016 | MAGNETIC BEARING DEVICE FOR SUPPORTING ROLL SHAFT - A magnetic bearing device includes a magnet generating a magnetic field at a protrusion formed toward a roll shaft, and a body portion supporting the magnet in one direction. The roll shaft is supported while an air gap is formed between the roll shaft and the protrusion, and both sides of the protrusion are rounded. | 03-03-2011 |
| 20110050017 | METHOD AND APPARATUS FOR CONTROLLING A BEARING THROUGH A PRESSURE BOUNDARY - A rotating apparatus includes a housing, a shaft at least partially disposed within a first pressure environment defined by the housing, a first magnetic bearing supporting the shaft and being at least partially disposed within the first pressure environment, a sensor operable to sense a position of the shaft relative to the first magnetic bearing, a controller disposed in a second pressure environment independent of the first pressure environment and operable to communicate with the sensor and to generate a control signal for the first magnetic bearing based on the sensed position, and a communication device operable to communicate the control signal between the controller and the first magnetic bearing and to communicate the sensed position between the sensor and the controller without penetrating a pressure boundary defined between the first and second pressure environments. | 03-03-2011 |
| 20110057528 | BEARING SYSTEM FOR HIGH SPEED ROTARY MACHINE IN A SUB SEA ENVIRONMENT - The present invention discloses a bearing system for a high speed rotary machine, said bearing system comprising a rotor shaft ( | 03-10-2011 |
| 20110074237 | Magnetic Levitation Novelty Device - An apparatus for animating a magnetically levitated object. The apparatus includes a display with an overhead housing. A magnetic levitation and oscillation assembly is included with an electromagnet in the overhead housing. A levitated object with a body in which a magnetic element is embedded is positioned proximate to the electromagnet and levitated within the display. The levitation and oscillation assembly includes a levitation actuator driving the electromagnet with a control signal to generate a levitating magnetic field. The assembly includes an oscillating signal generator that oscillates the levitating magnetic field at an oscillating frequency. During magnetic field oscillation, the object body is levitated by the electromagnet and is concurrently subjected to first oscillating movements while attached elements such as wings are subjected to second oscillating movements near their resonant frequency with larger displacements, whereby the object body appears stationary while attached elements vibrate with a reciprocating or flapping motion. | 03-31-2011 |
| 20110084563 | AUXILIARY BEARING SYSTEM WITH PLURALITY OF INERTIA RINGS FOR MAGNETICALLY SUPPORTED ROTOR SYSTEM - An auxiliary bearing system for supporting a rotating shaft including a first auxiliary bearing coupled to the rotating shaft. A first inertia ring is coupled to and circumscribes the first auxiliary bearing. A second inertia ring circumscribes the first inertia ring. A radial clearance is defined between the first and second inertia rings when the rotating shaft is supported by a primary bearing system, and the first inertia ring engages the second inertia ring when the rotating shaft is not supported by the primary bearing system. A second auxiliary bearing is engaged with an outer surface of the second inertia ring. | 04-14-2011 |
| 20110089780 | MAGNETIC BEARING WITH HIGH-TEMPERATURE SUPERCONDUCTOR ELEMENTS - A magnetic bearing with high-temperature superconductor elements which has a stator and a rotor, which is held such that it can rotate with respect to the stator and is mounted in an axially and radially self-regulating manner in the stator. A body of a Type-2 superconductor, in particular a high-temperature superconductor, is provided on the rotor. The stator has a coil of a superconducting material. | 04-21-2011 |
| 20110095633 | Magical Power - Electric generator also can generate from silicon magnetic and quartz material by attract and repulsion polarity of silicon magnetic north and south apply force compress and decompress on quartz material to create electric signal. The other useful of silicon magnetic can keep holes charge at bay to create more free flow of electrons that help silicon switching faster and low heat. | 04-28-2011 |
| 20110101808 | MAGNETIC BEARING DEVICE - Provided is a magnetic bearing device capable of facilitating manufacture of the magnetic bearing device and improving precision in production thereof while maintaining eddy current reducing effects. The magnetic bearing device | 05-05-2011 |
| 20110127868 | MAGNETIC BEARING AND METHOD FOR OPERATION THEREOF - The invention relates to a magnetic bearing and to a method for operation thereof. The magnetic bearing contains a ferromagnetic, movably mounted bearing element ( | 06-02-2011 |
| 20110133587 | BEARING CONCEPT FOR SEGMENT MOTORS - An electrical machine includes a stator coupled to a machine frame and constructed to produce a magnetic field. A rotor which is connected to a shaft magnetically interacts with the stator and is separated there from by an air gap which is arranged such that the magnetic field within the air gap is directed essentially parallel to the shaft axis during operation of the electrical machine. Arranged between the rotor and the stator is an axial bearing which absorbs attraction forces acting between the stator and the rotor in a direction of the shaft axis. An elastic coupling mechanically couples the stator to the machine frame and is made less stiff than the axial bearing with respect to a force acting in the direction of the shaft axis, and constructed such that a force acting on the rotor in the direction of the shaft axis is able to cause the stator to be translated with respect to the machine frame in the direction of the shaft axis. | 06-09-2011 |
| 20110140559 | Magnetic Bearing Device of a Rotor Shaft Against a Stator With Rotor Disc Elements, Which Engage Inside One Another, and Stator Disc Elements - The magnetic bearing device contains soft-magnetic rotor disc elements, which radially engage inside one another, and soft-magnetic stator disc elements. These elements are, on their sides facing one another, provided with annular tooth-like projections that are opposite one another on either side of an air gap. In addition, magnetic field generators for generating a magnetic flux oriented in an axial direction between the disc elements are assigned to the rotor disc elements or to the stator disc elements. | 06-16-2011 |
| 20110163622 | Combination Radial/Axial Electromagnetic Actuator - An electromagnetic actuator includes a body and first and second poles residing apart from the body. The first and second poles communicate magnetic flux across a gap with opposing end facing surfaces of the body. The body, the first pole, and the second pole are magnetically coupled and define an axial magnetic control circuit. A plurality of radial poles reside apart from the body, adjacent a lateral facing surface of the body, and communicate magnetic fluxes with the lateral facing surface. The body and the plurality of radial poles define a plurality of radial magnetic control circuits. The plurality of radial poles communicate magnetic fluxes with the lateral facing surface and at least one of the first pole or the second pole, and the body, the plurality of radial poles, and at least one of the first pole or the second pole define a magnetic bias circuit. | 07-07-2011 |
| 20110181140 | Apparatus Having a Stator and a Rotor Mounted in Said Stator - A stator has a first bearing for a first end of a shaft of the rotor, and a second bearing for a second end of the shaft. The first and the second bearings have a respective permanent magnet which exerts a magnetic force on the shaft. Alternatively, the shaft is in the form of a permanent magnet and the first and the second bearing have a respective ferromagnetic part. At least one of the two ends of the shaft is supported axially by means of a point bearing. The apparatus is, for example, a fan. | 07-28-2011 |
| 20110187217 | Magnetic bearing apparatus - A magnetic bearing apparatus is proposed having a stator ( | 08-04-2011 |
| 20110210631 | BEARING ARRANGEMENT AND BEARING BLOCK HAVING A MAGNETIC RADIAL BEARING AND A SAFETY BEARING FOR A ROTATING MACHINE - A bearing arrangement and a bearing block includes a magnetic radial bearing for the contact-less support of a rotor shaft of a rotating machine, and a touchdown bearing for catching the rotor shaft. Both bearings are connected to each other permanently and in an axially aligned manner, and are elastically suspended with regard to a bearing shield, a machine housing, or a foundation of the rotating machine. | 09-01-2011 |
| 20110234033 | COMBINATION RADIAL/AXIAL ELECTROMAGNETIC ACTUATOR WITH AN IMPROVED AXIAL FREQUENCY RESPONSE - A first bias magnetic flux may be communicated between a first axial pole and a first axial facing surface of the body. A second bias magnetic flux may be communicated between a second axial pole and a second axial facing surface of the body. A time-varying axial control magnetic flux may be communicated through the first and second axial facing surfaces of the body, and may be generated in a magnetic circuit including the body, the first and second axial poles, and an axial magnetic backiron. The first and second axial poles may include axial pole laminated inserts composed of electrically isolated steel laminations stacked along the body axis. The axial magnetic backiron may include laminated inserts composed of electrically isolated steel laminations stacked in the direction tangential to the body axis. The axial pole laminated inserts may be magnetically coupled to the axial magnetic backiron laminated inserts. | 09-29-2011 |
| 20110248587 | PERMANENT MAGNETIC DEVICE - An apparatus to operate with a rotor includes a plurality of permanent magnetic components and a plurality of hydraulic cylinders. The permanent magnetic components are arranged to surround the rotor. The hydraulic cylinders are coupled to permanent magnetic components and are connected via at least one hydraulic tube. | 10-13-2011 |
| 20110254396 | Magnetic-Assisted Linear Bearing - A door suspension system comprises a horizontally suspended ferromagnetic shaft; a nonmagnetic bracket comprising a bracket cylinder for enclosing a linear bearing and an attached bracket hanger plate for securing a door panel; a nonmagnetic cylindrical linear bearing sized to slide into the bracket cylinder and over the shaft; at least two spaced bores in the upper surface of the bracket cylinder; at least two spaced bores in the upper surface of the cylindrical linear bearing arranged so as to align with the spaced bores in the bracket cylinder; a cylindrical permanent magnet positioned in at least one of the spaced bores of the bracket cylinder; and a ferromagnetic armature to complete the magnetic circuit through the shaft and the magnet or magnets. | 10-20-2011 |
| 20110273044 | LARGE GAP HORIZONTAL FIELD MAGNETIC LEVITATOR - The invention is a magnetic levitation device that has a pair of permanent magnets or electromagnets, which are used to create a large constant magnetic field on a horizontal plane between two magnetic poles. An object is levitated between the two magnets and is kept within the horizontal magnetic field by an electromagnet that is controlled by a servomechanism. | 11-10-2011 |
| 20110285233 | INDUCTION MACHINE BEARING SYSTEM - A bearing assembly for an induction machine, such as an alternating current motor, includes a magnetic bearing for supporting a rotating shaft. An auxiliary bearing, also supporting the shaft in the event of magnetic bearing failure, is aligned with the motor end shield and frame so that shaft loads supported thereby are transferred to the frame in a manner that reduces likelihood of magnetic bearing contact with the shaft or its deformation. The bearing assembly may incorporate shock absorbing and vibration damping/isolation elements, such as o-rings, between the auxiliary bearing and its support structure interface to the frame. The auxiliary bearing may be incorporated in a removable cartridge for ease of machine maintenance. The bearing assembly may include heat dissipating fins. | 11-24-2011 |
| 20110291506 | CENTRIFUGALLY DECOUPLING TOUCHDOWN BEARINGS - Centrifugally decoupling mechanical bearing systems provide thin tensioned metallic ribbons contained in a support structure. This assembly rotates around a stationary shaft being centered at low speeds by the action of the metal ribbons. Tension springs are connected on one end to the ribbons and on the other end to the support structure. The ribbons pass through slots in the inner ring of the support structure. The spring preloading thus insures contact (or near-contact) between the ribbons and the shaft at rotation speeds below the transition speed. Above this speed, however, the centrifugal force on the ribbons produces a tensile force on them that exceeds the spring tensile force so that the ribbons curve outward, effectively decoupling them from mechanical contact with the shaft. They still remain, however, in position to act as a touchdown bearing in case of abnormally high transverse accelerations. | 12-01-2011 |
| 20110291507 | MAGNETIC BEARING ELEMENT WITH ADJUSTABLE STIFFNESS - A compact magnetic bearing element is provided which is made of permanent magnet discs configured to be capable of the adjustment of the bearing stiffness and levitation force over a wide range. | 12-01-2011 |
| 20110291508 | COMBINED RADIAL STABILIZER AND CENTERING ELEMENT FOR PASSIVE MAGNETIC BEARING SYSTEMS - A compact magnetic bearing element for radial centering is described. At zero and low speeds, the centering occurs through mechanical contact of a rotating slotted pole structure with stretched metallic ribbons. At higher speeds, eddy currents induced in the metallic ribbons provide non-contacting centering forces. Exemplary uses for the invention are generally in rotating machinery and in flywheel energy storage systems. | 12-01-2011 |
| 20110304232 | ELECTROMAGNETICALLY DRIVEN MOTOR AND ELECTRIC POWER GENERATOR - Method and apparatus for powering an electric motor by circumferentially positioning an array of drive magnets on a rotor and positioning a series of electromagnets on a platform surrounding the drive magnets. The electromagnets are energized and provided with a repulsive polarity at exact time and position necessary to repel a corresponding drive magnet on the rotor so as to drive the rotor in one direction. The rotor includes arrays of permanent magnets that induce current in wire coils circumferentially disposed in one or more stators around and in close proximity to the induction magnets. | 12-15-2011 |
| 20110309702 | ELECTRO-ACTUATED MAGNETIC BEARINGS - Techniques are generally described for adjusting a magnetic field in a magnetic bearing by moving permanent magnets in real time. Some example devices or systems include a magnetic bearing comprising electro-actuators adapted to move permanent magnets relative to a rotor to balance the rotor. For instance, in one example, each electro-actuator includes electro-active material adapted to deform in response to being exposed to an electrical field. This deformity causes permanent magnets attached to a surface of each electro-actuator to move relative to a rotor to balance the rotor. In many examples, a measurement circuit may be coupled to each electro-actuator and adapted to measure a capacitance of each electro-actuator. The capacitance measurement may be used to determine an adjustment signal to adjust the magnetic field in real time. | 12-22-2011 |
| 20110316376 | Split Magnetic Thrust Bearing - Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to: via a thrust stator of a magnetic bearing, the thrust stator adapted to be split into sectors so that a shaft of a machine can be removed from the magnetic bearing, producing an axi-symmetric field at each pole face of the thrust stator when the sectors are operatively assembled in the machine; and/or a magnetic bearing thrust stator, comprising a plurality of stator sectors, each of the stator sectors comprising a semi-circumferentially slotted stator portion comprising a plurality of semi-circumferential poles and a first coil portion shaped to fit substantially within the semi-circumferentially slotted stator portion. | 12-29-2011 |
| 20120001507 | SYSTEM AND METHOD FOR ACTIVELY CONTROLLING THE THRUST ACTING ON A ROTOR - Embodiments of the present invention provide a method and system of actively controlling, in real-time, a thrust load experienced by a rotor. The rotor may have the form of a single or multi-part shaft, upon which rotatable components are mounted. Embodiments of the present invention incorporate electromagnets, which may be in the form of an electromagnetic device located adjacent a thrust piston on the rotor, or other embossed feature. A control system may modulate the electrical current through the electromagnetic device to control the thrust load and the axial movement of the rotor. This may create a balance thrust or zero thrust condition, if desired. Alternatively, modulating the electrical current may allow biasing the thrust load in a desired direction. | 01-05-2012 |
| 20120013215 | METHOD AND APPARATUS FOR HYBRID SUSPENSION SYSTEM - A system for suspending a rotating body consisting of a combination of magnetic and engineered materials. The suspension system allows for some axial motion to account for varying system loads. | 01-19-2012 |
| 20120025648 | AXIALLY-ADJUSTABLE MAGNETIC BEARING AND A METHOD OF MOUNTING IT - The axially adjustable magnetic bearing comprises an annular body secured to a support, a magnetic bearing stator structure having an annular sheath for supporting electromagnet windings placed concentrically relative to said body, and an annular rotor armature placed concentrically relative to the stator structure, leaving an airgap relative thereto. The annular body includes at least one radial slot associated with clamping means, and includes a set-back portion in its face facing towards the stator structure. The face of the annular body facing towards the stator structure includes a sliding surface that co-operates with a facing portion of said sheath, and the set-back portion of the annular body presents a threaded portion that co-operates with a threaded portion of an adjustment ring engaged in an annular groove formed in the face of the sheath that faces towards the body. The adjustment ring is prevented from moving in the axial direction in said annular groove. | 02-02-2012 |
| 20120038232 | AXIAL MAGNETIC SUSPENSION - The present invention generally relates to an apparatus and method for axially supporting a shaft. In one aspect, a magnetic suspension system for supporting a shaft in a housing is provided. The magnetic suspension system includes an array of magnet members disposed between the shaft and the housing. The array of magnet members comprising a first magnet member, a second magnet member, and a third magnet member, wherein the first magnet member and the second magnet member generate a first force that is substantially parallel to a longitudinal axis of the shaft and the second magnet member and the third magnet member generate a second force that is substantially parallel with the longitudinal axis of the shaft The first force and the second force are configured to position the shaft axially within the housing. In another aspect, a method of supporting a shaft along a longitudinal axis of a housing is provided. In a further aspect, a suspension system for supporting a shaft in a housing is provided. | 02-16-2012 |
| 20120038233 | MAGNETIC BEARING, A ROTARY STAGE, AND A REFLECTIVE ELECTRON BEAM LITHOGRAPHY APPARATUS - A magnetic bearing ( | 02-16-2012 |
| 20120062060 | MAGNETIC FAN DEVICE - A magnetic fan device includes a stator, at least three bearings fixed on the stator, a rotor fixedly connected to the stator, a motor, and at least three magnetic posts. The at least three bearings are permanent magnets. The rotor includes a shaft and a plurality of impellers rotatably connected to the shaft. The at least three magnetic posts with an opening at its lateral surface are configured for respectively receiving the at least three bearings by the opening. A first magnet is adhered to ends of the at least three magnetic posts, and a second magnet is adhered to opposite ends of the at least three magnetic posts. The magnetic pole of the first magnet adjacent to ends of the at least three bearings is opposite to the magnetic pole of the second magnet adjacent opposite ends of the at least three bearings. | 03-15-2012 |
| 20120062061 | METHOD AND APPARATUS FOR ELEVATING AND MANIPULATING OBJECTS USING ELECTROMAGNETIC FIELDS ONLY - An enclosure to enclose the vertical electromagnetic repulsive elevation and manipulation of electromagnets is presented. The enclosure is capable of elevating the electromagnet to various heights and additionally horizontally repelling the elevated electromagnet from one elevated position to the next. The heights of the elevated electromagnet may vary depending on the voltage of the base electromagnets, the polarities of the electromagnets and the desired height of the elevated electromagnet. | 03-15-2012 |
| 20120074803 | Electric generator - My Improved Electrical Generator is a high efficiency generator that functions by a series of frictionless bearings and rotating magnets. | 03-29-2012 |
| 20120098369 | Suspended Rotors for Use in Electrical Generators and Other Devices - Apparatuses employing suspended rotors are provided. In one embodiment, an apparatus includes a housing forming an internal cavity and a rotor disposed in the internal cavity of the housing. The rotor has a first end and a second end. The apparatus also includes a first end ring coupled to the first end of the rotor and a second end ring coupled to the second end of the rotor. The first end ring and the second end ring are each magnetically repulsed from the housing to cause the rotor to be suspended relative to the housing. | 04-26-2012 |
| 20120098370 | STABILIZATION OF FLYWHEELS - This invention improves the operation of flywheels by allowing rotation about an inertial axis without the generation of imbalance forces that arise from the use of bearings to support the rotating components of the flywheel. The system uses periodic positional corrections to the rotating components of the flywheel so as to ensure that the system rotates within a predetermined boundary without continuously confining the rotating components to rotate about their geometric axis. | 04-26-2012 |
| 20120098371 | STABILIZATION OF ROTATING MACHINERY - This invention improves the operation of rotating machinery by allowing rotation about an inertial axis without the generation of imbalance forces that arise from the use of bearings to support rotating components. | 04-26-2012 |
| 20120112589 | MAGNETIC AND/OR ELECTROSTATIC PIVOT - Method for orienting a timepiece component made of magnetic/electrostatic material. | 05-10-2012 |
| 20120112590 | Magnetically Levitating Vehicle - The magnetically levitating vehicle comprises of a frame, a control device, tire chambers, and tires. The frame comprises of a magnetic shield, a cabin, and an undercarriage. The control device comprises of a control stick and a mounting system. The control stick comprises of an accelerator, levitation, and brake button. The mounting system comprises of a horizontal piece, a vertical and base piece, and push button locks. The plurality of tire chambers comprises of a plurality of sensor and levitation electromagnet pairs, propulsion electromagnets and permanent propulsion magnets. The vertical piece and horizontal piece both comprise of an inner and outer shaft, the latter of which comprises of a plurality of holes. The inner shell comprises of an orientation device, a plurality of permanent levitation magnets and sensor and propulsion electromagnet pairs, a plurality of permanent safety magnets, and an axle. The outer shell comprises of a tire tread. | 05-10-2012 |
| 20120126648 | MACHINE AND METHOD FOR MONITORING THE STATE OF A SAFETY BEARING OF A MACHINE - The invention relates to a method for monitoring the state of a safety bearing ( | 05-24-2012 |
| 20120139374 | MAGNETIC LEVITATION ASSEMBLY - A method and system for transportation using a magnetic bearing structure is disclosed. In one aspect, there is an apparatus for carrying a load along a magnetizable structure. In one embodiment, the apparatus comprises a third structure spaced apart vertically from the magnetizable structure and configured to generate magnetic flux and repel from the magnetizable structure. In one embodiment, the apparatus comprises at least one coil positioned at at least one end portion proximal to the magnetizable structure. In one embodiment, the apparatus comprises at least one flux guide comprising a magnetizable material and configured to concentrate magnetic flux. A first portion of the flux guide is thinner than a second portion of the flux guide that is positioned closer to the magnetizable structure than the first portion of the flux guide. | 06-07-2012 |
| 20120139375 | MAGNETIC LEVITATION CONTROL DEVICE AND HYBRID TYPE MAGNETIC BEARING - A bias magnetic flux is formed so as to be passed through the electromagnet core of an electromagnet, and a bypass magnetic path, serving as a magnetic path for a control magnetic flux, is formed in parallel with a permanent magnet, the bypass magnetic path being magnetized in a direction in which passage of the bias magnetic flux is blocked, and thus, even if the permanent magnet and the electromagnet are disposed in locations where the mutual magnetic fluxes of the permanent magnet and the electromagnet are superimposed, the control magnetic flux formed by the electromagnet is passed through the bypass magnetic path, whereby loss of the control magnetic flux can be suppressed. Thereby, the permanent magnet and the electromagnet can be disposed in locations where the mutual magnetic fluxes are superimposed, whereby the device can be made smaller in size. | 06-07-2012 |
| 20120169167 | Axial Hybrid Magnetic Bearing, Method for Operation thereof, and Structure for Rotor thereof - An axial hybrid magnetic bearing (HMB) is disclosed herein. The HMB has a first electric magnet, a second electric magnet, and a rotor being between the two electric magnets. The rotor has a permanent magnet (PM) structure facing the two electric magnets by its two sides. By doing so, the power consumption can be lower by a bias magnetic flux provided by the PM structure; the equilibrium point of the rotor can be adjusted by the magnetic force of the two electric magnets, which will not change the magnetic characteristic of the PM structure. | 07-05-2012 |
| 20120169168 | METHOD FOR ON-LINE DETECTION OF RESISTANCE-TO-GROUND FAULTS IN ACTIVE MAGNETIC BEARING SYSTEMS - A magnetic bearing is disclosed that includes a sensing wire wrapped around one or more of the bearing coils and configured to measure the resistance to ground of each bearing coil. With the presence of contaminants such as liquids, a protective coating disposed about the bearing coils degrades over time, thereby reducing the resistance to ground of the bearing coils. The sensing wire transmits the detected resistance to ground of the bearing coils to an adjacent sensing device, which can provide an output that informs a user whether corrective action is required to prevent damage or failure of the magnetic bearing. | 07-05-2012 |
| 20120175985 | PASSIVE MAGNETIC BEARING SYSTEM - An axial stabilizer for the rotor of a magnetic bearing provides external control of stiffness through switching in external inductances. External control also allows the stabilizer to become a part of a passive/active magnetic bearing system that requires no external source of power and no position sensor. Stabilizers for displacements transverse to the axis of rotation are provided that require only a single cylindrical Halbach array in its operation, and thus are especially suited for use in high rotation speed applications, such as flywheel energy storage systems. The elimination of the need of an inner cylindrical array solves the difficult mechanical problem of supplying support against centrifugal forces for the magnets of that array. Compensation is provided for the temperature variation of the strength of the magnetic fields of the permanent magnets in the levitating magnet arrays. | 07-12-2012 |
| 20120181887 | SAFETY BEARING FOR RETAINING A ROTOR SHAFT OF A MACHINE - The invention relates to a safety bearing for retaining a rotor shaft ( | 07-19-2012 |
| 20120212093 | LAMINATED CORE FOR A MAGNETIC BEARING AND METHOD FOR CONSTRUCTING SUCH A LAMINATED CORE - The core of a combined radial-axial magnetic bearing is stacked with coated laminations each equipped with at least one radial cut ( | 08-23-2012 |
| 20120299422 | ELECTROMAGNETIC ACTUATOR - A body is equipped with magnetically connected radial and axial actuator targets. The radial actuator target features a cylindrical lateral surface. The axial actuator target features the first and the second end-facing surfaces. A radial pole is adapted to communicate a magnetic flux with the cylindrical lateral surface. Magnetically connected first and second axial poles are located axially on one side of the radial pole and adapted to communicate magnetic fluxes with the first and the second end-facing surfaces. The first axial pole, the second axial pole and the axial actuator target form a magnetic axial control circuit. The radial pole, the radial actuator target, the axial actuator target, the first axial pole and the second axial pole form the magnetic bias circuit. Superposition of magnetic fluxes in the axial control circuit and in the bias circuit results in an axial force acting on the axial actuator target. | 11-29-2012 |
| 20120306304 | Motor - There is provided a motor including: a rotating member including a first magnet; and a fixed member supporting the rotating member and including a second magnet configuring a magnetic bearing part together with the first magnet, wherein a gap between the first and second magnets is larger than at least one of a contact prevention gap between the rotating member and the fixed member and a clearance between a shaft and a sleeve supporting the shaft. | 12-06-2012 |
| 20120306305 | ARRANGEMENT OF AXIAL AND RADIAL ELECTROMAGNETIC ACTUATORS - Systems, methods, and devices for generating electromagnetic forces may involve generating an axial control magnetic flux in an axial control magnetic circuit comprising a first axial pole, a second axial pole, and an axial actuator target, the axial actuator target coupled to a body having a rotational axis. A radial control flux can be generated in a radial control magnetic circuit comprising a first radial pole, a second radial pole, and a radial actuator target. An electrical compensation current can be applied to an electrical bias flux leveling coil to cancel or nearly cancel any changes of the magnetic flux leaking from either the first or the second axial poles into the radial poles, electrical bias flux leveling coil wound around the rotational axis and located axially between the radial poles and the closest of the first or the second axial poles. | 12-06-2012 |
| 20130009501 | MAGNETIC BEARING STRUCTURE AND TURBO MACHINE HAVING THE SAME - Disclosed is a magnetic bearing structure including a permanent magnet, levitating a rotation body without a bias current, and easily magnetizing the permanent magnet. The magnetic bearing structure includes a ring-shaped permanent magnet provided on a side of a rotation shaft and magnetized in a direction parallel with a shaft direction of the rotation shaft, a coil installed on a side of the permanent magnet, and a conductor installed on an external side of the coil and used to form a magnetic field path. According to the configuration, when an additional bias current is not supplied to the coil installed in the magnetic bearing, a rotation body levitates according to the magnetic field caused by the permanent magnet, and a magnetized direction of the permanent magnet is in parallel with a shaft direction of the rotation shaft thereby allowing easy magnetization and increasing productivity of the magnetic bearing. | 01-10-2013 |
| 20130020895 | APPARATUS, SYSTEM AND METHOD FOR DETECTING ANOMALOUS AXIAL DISPLACEMENTS OF A MAGNETICALLY LEVITATED FLYWHEEL IN AN ELECTROMECHANICAL BATTERY SYSTEM AND RELATED SYSTEMS AND METHODS - A magnetic-stabilizer bearing apparatus is described for stabilizing the magnetic bearing of an electromechanical battery (EMB) system, which includes a magnetic bearing arrangement having magnetic-stabilizer bearing elements, at least two Halbach arrays attached to the flywheel with a fixed conductive element positioned in-between each of the arrays and an EMB flywheel, and a control arrangement to monitor the current and detect an anomalous axial displacement of the flywheel from its equilibrium position if currents measured by the control arrangement exceed a characterized distribution of currents. Also described is a related method for stabilizing a magnetic bearing of an electromechanical battery (EMB) system. | 01-24-2013 |
| 20130038157 | Active Magnetic Bearing - An active magnetic bearing includes a bearing housing, a bearing stator, a bearing armature, a position detector, a jacket, and a stress buffering member. The bearing stator is accommodated in the bearing housing to support rotation of a rotor by using a magnetic force. The bearing armature is disposed to be spaced apart from the bearing stator by an interval and fixed to the rotor. The position detector is installed in the bearing housing to detect a position of the rotor. The jacket is interposed between the bearing stator and the bearing armature to seal a space between the bearing stator and the bearing housing. The stress buffering member connected to opposite ends of the jacket and the bearing housing, to buffer a stress generated due to differences between thermal exposition coefficients and temperatures of the bearing housing and the jacket. | 02-14-2013 |
| 20130049507 | PASSIVE MAGNETIC BEARINGS FOR ROTATING EQUIPMENT INCLUDING INDUCTION MACHINES - Permanent magnet bearings are incorporated into rotating equipment, such as induction machines, in addition to active magnetic or lubricated primary shaft support bearings. The passive magnetic bearings incorporate permanent magnets that generate directionally oriented magnetic fields of selective intensity. The magnetic field directions are aligned with a desired shaft support bearing preload direction and intensity, for example to exert axial thrust or radial preloads on the support bearings. A plurality of magnetic bearings may be oriented in opposed relationship with neutral or offsetting resultant forces. The passive magnetic force preload may be utilized to offset rotor vertical weight during induction startup or stopping cycles. Passive magnetic force preload may be applied to lubricated bearings to assure their operational stability. The passive magnetic bearings can also absorb radial or axial thrust forces imparted on the rotor shaft during induction machine operation, that may reduce machine operational noise, and energy consumption. | 02-28-2013 |
| 20130057097 | Displacement Sensor and a Magnetic Bearing System Using the Same - In a displacement sensor and a magnetic bearing system using the same, the displacement sensor includes: a first coil unit including at least one first coil; a second coil unit including at least one second coil differentially connected to one side of the at least one first coil of the first coil unit; a sensor drive means for supplying a first power source voltage and a second power source voltage having the same drive frequency to the first coil unit and the second coil unit, respectively; and a detection circuit for extracting displacement information from a differential signal produced by the first coil unit and the second coil unit due to a change in inductances of the at least one first coil and the at least one second coil according to a position change of a displacement measurement object. | 03-07-2013 |
| 20130062982 | METHOD FOR ADJUSTING RESISTANCE OF ELECTROMAGNET IN MAGNETIC BEARING AND FOR SENSORLESS DETERMINATION OF POSITION OF OBJECT MOUNTED IN MAGNETIC BEARING, TAKING INTO ACCOUNT ADJUSTED VALUE OF RESISTANCE - For an object on a bearing mounting having a magnetic bearing providing a magnetic field generally produced by an electromagnet, the bearing is regulated based on a position of the object relative to the bearing. The position of the object is determined by reference to an estimate of the inductance obtained using a least squares method, in which the electrical resistance of the bearing is taken into account. The resistance is subject to variations, for example due to temperature fluctuations; however, the electrical resistance can be estimated by regulating the inductance error, Ī{circumflex over (L)}={circumflex over (L)} | 03-14-2013 |
| 20130069466 | SPINDLE MOTOR - Disclosed herein is a spindle motor including: a shaft; a bearing receiving the shaft therein to thereby rotatably support the shaft; a bearing holder having the bearing mounted therein; an armature including a core stacked on an outer diameter of the bearing holder and a coil wound around the core; a rotor case having a magnet mounted therein so as to rotate by electromagnetic force with the armature and mounted on an outer diameter of the shaft; and an electromagnet selectively mounted on the armature or the bearing holder so as to face the rotor case, thereby preventing floating or separation of the rotor case by attractive force. | 03-21-2013 |
| 20130147296 | MAGNETIC LEVITATION TYPE VACUUM PUMP AND MAGNETIC LEVITATION DEVICE - A magnetic levitation type vacuum pump includes an electromagnet magnetically levitating a rotor by a magnetic force, an electromagnet driving circuit supplying an electromagnet current including a magnetic levitation control current component and a carrier wave current component having a frequency band higher than the magnetic levitation control current component to the electromagnet coil, a levitated position detecting circuit detecting the carrier wave current component and generating a levitated position signal of the rotor, a magnetic levitation control circuit inputting a current command of the magnetic levitation control current component to the electromagnet driving circuit based on the levitated position signal. The electromagnet coil has a primary coil and a secondary coil connected in parallel with the primary coil. An interrupting circuit connected in series with the secondary coil for the carrier wave current component passing therethrough and interrupting the magnetic levitation control current component is further included. | 06-13-2013 |
| 20130181560 | Electric Machine having Two Rotors and at least Two Bearings - An electric machine is provided. The electric machine includes at least one stator, a shaft, movable in rotation around an axis of rotation, two rotors, each being interdependent of the shaft, at least two bearings, able to support both rotors and the shaft. A single bearing is located between both rotors along the axis of rotation. | 07-18-2013 |
| 20130207495 | Electric Machine - An electric machine, for example, a motor, is provided. The machine or motor includes a stator, a rotor, at least one main bearing for supporting the rotor relative to the stator in a main range of speeds and at least one secondary bearing suitable for supporting the rotor relative to the stator when the first main bearing is faulty. Each secondary bearing is a passive electrodynamic bearing and includes at least one permanent magnet and a moveable electric conductor element. | 08-15-2013 |
| 20130207496 | SYSTEM AND METHOD FOR PERFORMING MAGNETIC LEVITATION IN AN ENERGY STORAGE FLYWHEEL - A system for performing magnetic levitation of an energy storage flywheel, including an upper levitator pole which includes a permanent magnet and an electromagnet, a lower levitator pole fixed to the energy storage flywheel and being formed of a material capable of being attracted to or repelled from the upper levitator pole when a magnetic flux is applied to the magnetic flux path of the permanent magnet of the upper levitator pole, an electromagnetic driver which applies an electric current through the electromagnet of the upper levitator pole, and a controller which controls the electromagnetic driver so as to control the electric current applied through the electromagnet, causing the lower levitator pole to be controllably attracted to or repelled from the upper levitator pole. | 08-15-2013 |
| 20130229078 | CONTROL FOR ROTATING ELECTRICAL MACHINERY - An example rotating electrical machine includes a stator assembly, a rotor, and a controller. The stator assembly has two or more stator control coils and is centered on a Z axis that is perpendicular to an XY plane defined by mutually perpendicular X and Y axes. The rotor is configured to rotate about a rotational axis that is nominally collinear with the Z axis and has a magnet array that provides a magnetic field configured to pass through the stator control coils. The controller is configured to control the stator control coils to selectively generate magnetic fields that interact with the magnetic field of the magnet array to: control rotation of the rotor about the second axis; and one or both of: control translation of the rotor in the XY plane; and control rotation of the rotor about the X axis and the Y axis. | 09-05-2013 |
| 20130229079 | MAGNETIC BEARING CONTROL DEVICE AND EXHAUST PUMP HAVING MAGNETIC BEARING CONTROL DEVICE - To provide a magnetic bearing control device that identifies a movable range of an eddy current gap sensor configuring a magnetic bearing and a center of the movable range and easily controls a rotor shaft and other controlled shafts, which are lifted by the magnetic bearing, in a central position of a protective bearing. The magnetic bearing control device has a first function for detecting an X-axis direction movable limit position of the rotor shaft; a second function for identifying a center of an X-axis movable range of an X-axis eddy current gap sensor (āX sensor, +X sensor) based on the X-axis direction movable limit position detected by the first function; a third function for detecting a Y-axis direction movable limit position of the rotor shaft; a fourth function for identifying a center of a Y-axis movable range of a Y-axis eddy current gap sensor (+Y sensor, āY sensor) based on the Y-axis direction movable limit position detected by the third function; and a fifth function for turning an excitation current of a Y-axis electromagnet (+Y electromagnet, āY electromagnet) OFF when the first function detects the X-axis direction movable limit position and the second function identifies the center of the X-axis movable range, and turning an excitation current of an X-axis electromagnet (+X electromagnet, āX electromagnet) OFF when the third function detects the Y-axis direction movable limit position and the fourth function identifies the center of the Y-axis movable rage. | 09-05-2013 |
| 20130257206 | PRELOAD CONTROL DEVICE OF MAGNETIC BEARING - The present invention provides a preload control device of a magnetic bearing, which includes a main shaft, a housing, a first magnetic bearing mechanism, a second magnetic bearing mechanism, a pressing mechanism, and a sliding member. The main shaft is rotatably formed in the shape of a rod that is longitudinally long. The housing covers and is fixed outside the main shaft. The first magnetic bearing mechanism is disposed between the housing and the main shaft. The second magnetic bearing mechanism is spaced from the first magnetic bearing mechanism in the axial direction of the main shaft, between the housing and the main shaft. The pressing mechanism is disposed between the second magnetic bearing mechanism and the frusto-conical member. The sliding member is disposed between the pressing mechanism and the second magnetic bearing mechanism. | 10-03-2013 |
| 20130270946 | MAGNETIC BEARING DRIVE CIRCUIT - There is provided a magnetic bearing drive circuit driven from a pair of Direct Current (DC) link voltage rails, said magnetic bearing drive circuit having at least one amplifier providing an output PWM drive signal for driving a magnetic bearing winding, said output PWM drive signal being provided to the magnetic bearing winding through a plurality of drive signal rails, said magnetic bearing drive circuit comprising a pair of voltage offset devices coupled to the DC link voltage rails and arranged to provide a pair of offset catcher voltage rails from the DC link voltage rails, and primary clamping means coupled between each off-set catcher voltage rail and a respective one of the drive signal rails. | 10-17-2013 |
| 20130278101 | SPINDLE MOTOR - A spindle motor is provided, the motor including a bearing assembly including an upper surface-opened cylindrical bearing housing and a bearing accommodated in the bearing housing and formed with a rotation shaft hole; a stator including a core coupled to a periphery of the bearing housing and a coil wound on the core; a rotation shaft inserted into the rotation shaft hole; a rotor including a disk-shaped yoke coupled to the rotation shaft and a magnet coupled to the yoke to face the core; and a suction magnet arranged at the yoke facing the core, wherein the bearing housing includes a body coupled to the core and a core fixture bent from the body to face the core, and the suction magnet is so arranged as to face the core fixture corresponding to an external side of a bent unit bent from the body for forming the core fixture. | 10-24-2013 |
| 20130293049 | AXIAL PASSIVE MAGNET BEARING SYSTEM - An axial passive magnet bearing system utilizes the friction-less characteristic of non-contact type permanent magnet bearing to minimize the disadvantages induced by frictions. For example, both the energy and material loses of the mechanical bearing. Two permanents magnet are made of permanent magnet materials and positioned over two opposite surfaces of two mechanical structures, where mechanical bearing(s) is located therebetween. Hence, the magnetic force between the two magnets can improve some disadvantages among the two mechanical structures and the mechanical bearings, such as friction and energy loss. | 11-07-2013 |
| 20130293050 | HYBRID TYPE MAGNET BEARING SYSTEM - A hybrid type permanent magnet bearing system which utilizes four permanent magnet rings to replace the mechanical bearings. These rings are divided into two separated groups along an axis, where each group has an inner ring and a separated outer ring. At least one permanent magnet ring has a surface facing the gap between the two groups but being not vertical to the axis. Hence, inside the gap, the magnetic field between these permanent magnet rings is not non-uniform over different directions, and then it may behave as the axial and radical bearing simultaneously. | 11-07-2013 |
| 20130293051 | RADIAL MAGNETIC BEARING FOR MAGNETIC SUPPORT OF A ROTOR - A radial magnetic bearing for magnetic bearing of a rotor has a stator which includes a magnetically conductive stator element, arranged circulating around a rotor. The stator element has recesses running in the axial direction of the stator element in which electrical lines from coils are arranged, wherein magnetic fields can be generated by the coils which hold the rotor suspended in an air gap arranged between the rotor and stator. A softer progression of the components of magnetic flow density in the radial direction is achieved by design measures on the transitions from one magnetic pole to the next magnetic pole, which results in a reduction of the eddy currents induced in the rotor | 11-07-2013 |
| 20140015361 | LAMINATION SLEEVE WITH AN AXIAL HYDRAULIC FITTING PORT - A centrifugal gas compressor radial magnetic bearing ( | 01-16-2014 |
| 20140028135 | AXIAL BEARING DEVICE HAVING INCREASED IRON FILLING - An axial bearing device includes an annular electrical sheet arrangement having individual sheets which protrude radially outward. In addition, an electrical coil is provided in the axial bearing device and is inserted into the electrical sheet arrangement to generate a magnetic field in the electrical sheet arrangement. The electric sheet arrangement includes at least two concentric electrical sheet rings. All adjacent electrical sheets of each electrical sheet ring substantially abut at the inner circumference of the respective electrical sheet ring. | 01-30-2014 |
| 20140035411 | Non-Contact Thrust Bearing Using Permanent Magnets - A magnetic thrust bearing for use in a device for relatively free rotational movement of a first part relative to a second part includes axial and laterally spaced magnets. Each magnet has a magnetic field of force with opposing poles and a transition section which converges to a transition line. Axial magnets are spaced on an axis of the first part of the device and lateral magnets are arranged on the second part of the device. The lateral magnets operating in units, having paired lateral magnets positioned on opposite sides of the axis with each of the paired magnets having an equal length and equal gap or space from the axis. Axial magnets have an alternating polar orientation such that the nearest magnetic poles of adjacent axial magnets are repelling, and the distance between transition lines of the axial magnets is substantially equal to the length of the lateral magnets. Accordingly, the magnetic field of force of each lateral magnetic unit is perpendicular and attracting to the repelling fields of force between adjacent axial magnets for lateral displacement of the first part relative to the second part by a fixed gap, so that, with this arrangement, the permanent-magnet bearing enables non-contact, relative motion between the two parts of the device using both attractive and repelling forces generated by magnets. | 02-06-2014 |
| 20140035412 | Magnetic Bearing Assembly - Stray magnetic fields created by non-symmetrical magnetisation of the permanent magnets in a rotating magnet array of a magnetic bearing assembly, when used in turbo molecular pumps, can cause significant problems to devices such as scanning electron microscopes. In order to minimise the stray fields, at least the dipole and quadrupole moments of each magnet in the array is first measured. The magnets in the array are then arranged relative to one another such that both the dipole and quadrupole moments are minimised, thus minimising the stray magnetic field when the magnet array rotates in the turbomolecular pump. | 02-06-2014 |
| 20140062239 | ROTATIONAL MACHINE AS WELL AS APPARATUS HAVING A ROTATIONAL MACHINE - The invention relates to a rotational machine, designed as a bearing free motor, including a stator ( | 03-06-2014 |
| 20140077645 | DEVICE AND METHOD FOR CONTROLLING AN ACTIVE MAGNETIC BEARING - A command procedure for an active magnetic bearing, the magnetic bearing comprising a series of electromagnetic actuators forming a stator, each actuator being suitable for exerting radial force on the rotor, a ferromagnetic body forming a rotor, kept free of contact between the electromagnetic actuators and suitable for being set in rotation around an axis of rotation, the rotor being suitable to undergo precession movements in particular. Sensors suitable for detecting radial displacements of the rotor and issuing position signals representative of the radial position of the rotor in relation to the actuators. Calculation of at least one actuator command signal the calculation of the command signal consisting of the application of at least one transfer function to the position signals, the transfer function containing a number of correction coefficients. | 03-20-2014 |
| 20140111047 | MAGNETIC BEARING APPARATUS AND METHOD FOR VARYING SHAFT THRUST LOAD SUPPORT IN INDUCTION MOTORS AND OTHER ROTATING MACHINERY - A permanent magnet bearing supports part of thrust loads of a vertical shaft induction motor, or the thrust loads of other types of rotation machinery regardless of shaft rotational axis orientation, in parallel with a lubricated mechanical bearing. The permanent magnet has a stationary magnet portion coupled to a bearing bracket and a rotating portion adapted for coupling to a rotor shaft. The permanent magnet bearing exerts a directional magnetic force that generates a preload support force on the rotor shaft that is selectively varied by varying air gap between the stationary and rotating magnet portions. Air gap between the magnet portions is varied with an air gap adjustment mechanism. The gap adjustment mechanism may be coupled to a control system that in some embodiments causes the permanent magnet bearing to vary the air gap based on external load applied on the motor. | 04-24-2014 |
| 20140117801 | ACTIVE MAGNETIC BEARING COMPRISING MEANS FOR DAMPING THE RADIAL MOTION OF A SHAFT OF A ROTARY MACHINE - An active magnetic bearing comprising a plurality of electromagnetic actuators, each actuator receiving for control thereof an input current and being able to exert a radial force on a shaft of a rotary machine, with respect to the rotation axis of said shaft, the shaft being able to be held without contact between the electromagnetic actuators and to undergo radial motion when it is in rotation, means for supplying input current of each actuator, the supply means comprising means for controlling the input current of each actuator, according to the position of the shaft with respect to the actuators. The supply means comprise means for damping the radial motion of the shaft. | 05-01-2014 |
| 20140125176 | Hybrid Bearing - A method and apparatus for radial and axial hybrid bearings using gas sector(s) and magnetic sector(s) to increase bearing load capacity and stiffness, reduce bearing size and bearing span, and reduce cost comprises a stator and a rotor. An illustrative embodiment of a stator for use with a hybrid bearing may include one or more bearing pads positioned in a gas sector, and the stator may also include one or more magnetic sectors. The hybrid bearings may provide for the elimination of much of the magnetic bearing structure and associated power electronics using a pressurized gas/air bearing to react the bearing steady load while reserving the magnetic bearing and its controls to react dynamic loads and stabilize the bearing. In addition, the magnetic bearing controls for a hybrid bearing may be used to monitor bearing operating condition and provide communications of these conditions to the outside world. | 05-08-2014 |
| 20140145534 | MAGNETIC BEARING SYSTEMS AND METHODS OF CONTROLLING THE SAME - A magnetic bearing system includes a first electromagnet, a second electromagnet opposing the first electromagnet, and a rotor positioned between the first and second electromagnets. The first and second electromagnets are configured to apply a magnetic force. The system also includes a controller configured to determine a control action necessary to move the rotor to a predetermined rotor setpoint. The system further includes a nonlinear compensation device configured to calculate a first electrical current setpoint for the first electromagnet and a second electrical current setpoint for the second electromagnet to maintain a predetermined stiffness during at least one of startup, operation, and shutdown of the magnetic bearing system. The first and second electrical current setpoints are calculated based on the control action determined by the controller. | 05-29-2014 |
| 20140159526 | RADIAL DIRECTION CONTROLLER AND MAGNETIC BEARING APPARATUS UTILIZING SAME - Provided is a radial direction controller capable of handling changes in negative bearing stiffness according to the mounting orientation. This radial direction controller, which is a magnetic bearing device that lifts and supports a rotating body by electromagnets, is equipped with: a radial control circuit for controlling displacement of the axis of the rotating body in the radial direction; a negative bearing stiffness elimination circuit that is connected in parallel with the radial control circuit and outputs a signal about the negative bearing stiffness; converters that output current values for controlling the electromagnets, based on the output signals from these circuits; filters that extract the DC component from the current values; computing units that compute correction coefficients based on the extracted DC components and the bias current of the electromagnets; and multiplication units that multiply the computed correction coefficients with the signal output from the negative bearing stiffness elimination circuit. | 06-12-2014 |
| 20140167543 | MAGNETIC THRUST BEARINGS - Rotating machines and magnetic thrust bearings therefor are disclosed. Magnetic thrust bearings may include a rotor core configured to extend coaxially around a shaft of a rotating machine, a non-magnetic element configured to be coaxially disposed on the shaft, and a stator comprising a stator core and a coil, both of which are configured to extend coaxially around the axis. The rotor core may include a substantially radially extending thrust face and a substantially axially extending peripheral surface. The non-magnetic element may radially space the thrust face from the shaft. The stator core may include a substantially radially extending first pole surface and a substantially axially extending second pole surface. The first pole surface may define an axial air gap with the thrust face, and the second pole surface may define a radial air gap with the peripheral surface. | 06-19-2014 |
| 20140175925 | MAGNETIC BEARING APPARATUS AND METHOD FOR REDUCING VIBRATION CAUSED BY MAGNETIC BEARING APPARATUS - A magnetic bearing apparatus for supporting a rotational shaft includes a magnetic bearing, a rotation sensor, a controller which controls an electric current flown to an electromagnet, and at least one vibration sensor. The controller controls the electric current flown to the electromagnet as follows: in a first control mode, a first electric current is flown to the electromagnet for levitating and supporting the rotational shaft; and in a second control mode, a second electric current is flown to the electromagnet in place of the first electric current at a first periodic timing which is detected by the rotation sensor so that vibration is reduced to a lower level than a first vibration value detected in the first control mode in at least one of setting location of the at least one vibration sensor. | 06-26-2014 |
| 20140191604 | MECHANICAL BACKUP BEARING ARRANGEMENT FOR A MAGNETIC BEARING SYSTEM - The present disclosure describes a mechanical backup bearing system arrangement to work in conjunction with non-contact magnetic bearings and capable of coping with thermal expansions of the bearing components during operations. Expansions or contractions of an inner or outer race of a bearing can be compensated using particular springs providing a low profile and a proper stiffness. An electric machine system includes a rotational portion and a stationary portion. The electric machine further includes a magnetic bearing configured to support the rotational portion to rotate within the stationary portion. A mechanical back-up bearing resides in a cavity between the rotational portion and the stationary portion. A flat spring is carried by the stationary portion and abutting the back-up bearing. | 07-10-2014 |
| 20140232226 | HIGH CONICAL ANGLE TOUCH DOWN BEARING - A machine comprises a rotor ( | 08-21-2014 |
| 20140246937 | ANTI-WHIRL TOUCHDOWN BEARING - Stabilizing techniques are provided that prevent whirl-type instabilities during the operation of magnetically levitated rotating systems. Examples include tensioned foil and tensioned wire based designs, where a restraining force arises from contact between a rotating shaft and the tensioned elements, which elements may be of either metallic or non-metallic composition. Another stabilizing technique provides a variation with azimuth in the tension of an array of foils (or wires) so as to create anisotropic stiffness for displacements that are 90Ā° apart in azimuth. Another exemplary technique restrains displacements that have components that are transverse to (i.e., parallel with) the axis of rotation. | 09-04-2014 |
| 20140252899 | ROTATING ELECTRICAL MACHINE AND METHOD FOR MEASURING A DISPLACEMENT OF A ROTOR OF A ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes a stator, a rotor and at least one active magnetic bearing including a bearing winding, which is an air-gap winding, and includes at least a first phase winding and a second phase winding. A measurement arrangement measures the radial displacement of the rotor by injecting a displacement measurement injected signal into at least one section of at least one of the bearing windings of one of the magnetic bearings, and capturing at least one displacement measurement signal wherein this displacement measurement signal depends on the rotor displacement in a radial direction relative to the stator, this dependency being due to eddy currents in the rotor induced by the displacement measurement injected signal. | 09-11-2014 |
| 20140265688 | ELECTROSTATIC STABILIZER FOR A PASSIVE MAGNETIC BEARING SYSTEM - Electrostatic stabilizers are provided for passive bearing systems composed of annular magnets having a net positive stiffness against radial displacements and that have a negative stiffness for vertical displacements, resulting in a vertical instability. Further embodiments are shown of a radial electrostatic stabilizer geometry (using circuitry similar to that employed in the vertical stabilizer). This version is suitable for stabilizing radial (lateral) displacements of a rotor that is levitated by annular permanent magnets that are stable against vertical displacements but are unstable against radial displacements. | 09-18-2014 |
| 20140265689 | GENERATING RADIAL ELECTROMAGNETIC FORCES - An electromagnetic actuator can exert a radial electromagnetic force on a body that is configured to rotate about a rotational axis. The actuator includes a radial control magnetic pole assembly that includes radial control poles adjacent to and spaced apart by air gaps from the body. The actuator includes a permanent magnet (PM) magnetized along the axis, having one pole in contact with an axial face of the assembly and located proximate to a lateral surface of the body. The PM is magnetically coupled to the body in a non-contact manner resulting in a bias magnetic flux in the air gaps. The actuator includes a control coil around the radial control poles located radially outwards from the PM. Electrical current in the coils generates control magnetic flux in air gaps. The non-uniform net magnetic flux distribution around the body results in a radial electromagnetic force exerted on the body. | 09-18-2014 |
| 20140265690 | MAGNETIC LEVITATION OF A STATIONARY OR MOVING OBJECT - A magnetic lifting device is described. The magnetic lifting device can be configured to generate magnetic lift using a moving magnetic field to generate an eddy current effect in conductive substrate beneath the device. In one embodiment, the moving magnetic field can be generated by a rotor with arrangement of permanent magnets which is driven by a motor. In operation, the rotor can be spun up from rest to above a threshold velocity, which causes the magnetic lifting device to rise up from the conductive substrate, hover in place in free flight and move from location to location. In free flight, the magnetic lifting device can be configured to carry a payload, such as a person. | 09-18-2014 |
| 20140285046 | METHOD FOR CORRECTING VARIATIONS OF PARAMETERS OF COMPONENTS AND/OR OF ASSEMBLY OF ACTIVE MAGNETIC BEARING AND ACTIVE MAGNETIC BEARING FOR BEARING ROTATING WORKING MEANS - The invention relates to a method for correcting variations of parameters of components of active magnetic bearing and/or assembly of active magnetic bearing as a whole. At the latest before starting to operate the active magnetic bearing are detected mechanical and/or electrical and/or installation variations and/or other variations of parameters of at least one component of the active magnetic bearing and/or of the whole active magnetic bearing assembly, whereupon the detected variations and/or correction values based on the variations are recorded in memory (M), which is an integral part of the active magnetic bearing assembly, and subsequently these variations and/or correction values are used from the memory (M) for adjustment of system for detecting position of the rotating working means in the active magnetic bearing during operation of the active magnetic bearing. The invention further relates to an active magnetic bearing for bearing a rotating working means which comprises in the basic body placed means of creating a magnetic field, in which the rotating working means is arranged and which further comprises sensors of position of the rotating working means, whereby, with each said sensor of position are aligned detector of its output signal and evaluation circuits. In the active magnetic bearing assembly there is arranged a memory (M), in which are stored values of production and/or electrical and/or installation variations of at least one component of the active magnetic bearing and/or variations of the whole active magnetic bearing assembly and/or in the memory (M) are stored correction values formed from said variations, whereby the memory (M), the control system and/or the detectors (D) of the output signal of the sensors (A) of the position and/or the evaluation circuits are interconnected or interconnectable. | 09-25-2014 |
| 20140339940 | METHOD FOR OPERATING A THREE-PHASE INVERTER OF A CONVERTER-FED MAGNETIC BEARING - In a method for operating a three-phase inverter of a converter-fed magnetic bearing, two coils are connected to respective outputs of the three-phase inverter at one end and are connected to each other and to a third output of the three-phase inverter at the other end. A variable control current is injected into the third output. A constant bias current flows between the respective outputs and thus serially through the two coils. The control current is divided among the two respective outputs so as to flow parallel through the two coils. This arrangement significantly reduces the effective current load of the three-phase inverter and significantly increases the slew rate of the control current. | 11-20-2014 |
| 20140339941 | MAGNETIC RADIAL BEARING HAVING SINGLE SHEETS IN THE TANGENTIAL DIRECTION - The invention relates to an easily mountable and highly dynamic radial bearing. According to the invention, a magnetic radial bearing for the rotatable mounting of a rotor ( | 11-20-2014 |
| 20140354098 | Auxiliary bearing for magnetically suspended rotor system - An assembly that includes a rotating shaft supported with respect to a stationary housing by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing having a bushing fixed to the housing and a sleeve fixed on the rotating shaft. The bushing and the sleeve have opposite surfaces that define a clearance (E2) which is less than the mean radial air gap (E1). The bushing and the sleeve each exhibit symmetry around a longitudinal axis of the shaft and have different profiles in a longitudinal cross-section including the longitudinal axis to optimize the contact pressure distribution when the rotating shaft lands on the auxiliary bearing. | 12-04-2014 |
| 20140361651 | COMPOSITE MAGNETIC BEARING HAVING AUXILIARY BEARING COUPLED THERETO - The present invention relates to a composite magnetic bearing having an auxiliary bearing coupled thereto, which has an improved structure for minimizing a length of a rotor and a system volume. | 12-11-2014 |
| 20150028706 | AUXILIARY BEARING OF THE BALL BEARING TYPE FOR A MAGNETICALLY SUSPENDED ROTOR SYSTEM - An assembly includes a rotating shaft supported with respect to a stationary housing by at least one active magnetic bearing presenting a mean radial air gap and at least one auxiliary bearing having first and second coaxially arranged annular surfaces is provided. One of the first and second coaxially arranged annular surfaces defines a clearance (E | 01-29-2015 |
| 20150054368 | MOTOR - A motor includes a rotor module and a stator module. The rotor module includes a plurality of first magnet units, a plurality of second magnet units, a hollow magnetic conductance pillar and a rotating shaft. The first and second magnet units are alternately arranged to form a hollow pillar. An outer surface of the hollow pillar includes a plurality of first surfaces and second surfaces of the first and second magnet units. The first and second surfaces have different magnetic poles. The hollow magnetic conductance pillar and the rotating shaft are disposed in and through the hollow pillar and the hollow magnetic conductance pillar, respectively. The stator module includes a shell and a coil unit. The rotor module is disposed in the shell and the rotating shaft is extended out of the shell. The coil unit is disposed on an inner surface of the shell and around the rotor module. | 02-26-2015 |
| 20150084464 | PERMANENT MAGNET ROTOR SHAFT ASSEMBLY AND METHOD - A permanent magnet rotor shaft assembly for a high speed electrical machine provides a permanent magnet cylindrical core having a longitudinal axis, the cylindrical core being axially compressed by first and second end shafts and being radially compressed by a sleeve made of a non-magnetic high strength metal. At least one of the first and second end shafts includes, facing the cylindrical core, a central shoulder head that cooperates with a mating central recess made in a central portion of a front face of the cylindrical core. An easy concentric alignment of the first and second end shafts with the permanent magnet cylindrical core is allowed while inserting the sleeve and the stiffness of the assembled set is enhanced. | 03-26-2015 |
| 20150097457 | MACHINE HAVING A BACK-UP BEARING HAVING A HYBRID ARRANGEMENT - A machine having a stator and a rotor having a rotor shaft supported in bearings, such that the rotor is rotatable about a rotation axis. The bearings are designed as active magnetic bearings in which the rotor is supported without contact. A respective back-up bearing is associated with each active magnetic bearing to catch the rotor when the respective active magnetic bearing fails. The respective back-up bearing has a bushing arranged on the rotor shaft and a sliding device arranged on the stator. The respective bushing has an inner ring arranged radially inside to fasten the bushing on the rotor shaft, and an outer ring that surrounds the inner ring radially outside and slides in the sliding device of the respective back-up bearing when the respective active magnetic bearing fails. The inner and outer rings are made of different materials and are connected to each other in a bonded manner. | 04-09-2015 |
| 20150115756 | AXIAL-LOADING MEGNETIC RELUCTANCE DEVICE - A magnetic bearing retains a rotatable shaft in a selected position by magnetic coupling between a circular magnet and one or more magnet arrays. Each magnetic coupling completes a magnetic circuit. The magnet arrays focus magnetic flux towards the circular magnet to facilitate magnetic coupling. Magnet arrays configured in Halbach series may be employed. Magnet arrays configured as electromagnets may also be employed. The shaft may be attached either to the circular magnet or the magnet arrays. Shaft rotation does not affect the magnetic circuit, but axial displacement of the shaft disrupts the magnetic circuit and increases magnetic reluctance. Increasing magnetic reluctance inhibits axial displacement. The shaft thereby supports a load while rotating freely, constrained to a selected position by forces of magnetic reluctance. A centering bearing may be employed to maintain gap distance between circular magnet and one or more magnet arrays. | 04-30-2015 |
| 20150130313 | Method and Apparatus For Hybrid Suspension System - A system for suspending a rotating body consisting of a combination of magnetic and engineered materials. The suspension system allows for some axial motion to account for varying system loads. | 05-14-2015 |
| 20150137642 | MAGNETIC BEARING AND METHOD FOR MOUNTING A FERROMAGNETIC STRUCTURE AROUND A CORE OF A MAGNETIC BEARING - Magnetic bearing that is provided with a radial actuator part and an axial actuator part, whereby the aforementioned radial actuator part comprises a laminated stator stack that is provided with a stator yoke, wherein the stator yoke is linked to a closed ferromagnetic structure that surrounds the stator yoke. | 05-21-2015 |
| 20150137643 | RADIAL MAGNETIC BEARING AND METHOD OF MANUFACTURE - A radial magnetic bearing having an inner rotor including a central shaft having a ferromagnetic armature mounted on the shaft and an outer stator providing a plurality of electromagnets including poles made of ferromagnetic material which project radially inwardly towards the rotor is provided. As such, air-gaps (e) are left between end faces of the poles and the ferromagnetic armature, and coils wound around the poles. The poles are extended through outer portions attached to a supporting member. Each pole and the corresponding outer portion are included in an angularly segmented module providing a stack of laminations made of ferromagnetic material. The outer portion defines shoulders with respect to the corresponding pole, the outer portion contacting outer portions of neighboring segmented modules and the outer portions of all segmented modules being assembled by clamping rings, wherein the coils located in free spaces around the poles are mounted in a string. | 05-21-2015 |
| 20150145362 | END PLATE FOR AN ELECTRIC MACHINE, ELECTRIC MACHINE AND METHOD FOR ASSEMBLING AN ELECTRIC MACHINE - An end plate for an electric machine includes: a bearing receptacle in which a magnetic bearing which is configured for rotatably mounting a rotor of the electric machine can be accommodated; and a radially outwardly pointing circumferential contour on which a number of at least three supporting elements are provided, which supporting elements each protrude radially beyond the circumferential contour by a determined protruding amount, with the result that the supporting elements define a discontinuous external circumferential contour of the end plate. The respective protruding amounts of the support elements are dimensioned such that the end plate can be fitted in by making a center of the magnetic bearing correspond to at least one of a geometric longitudinal axis of the electric machine and a magnetic longitudinal axis of the electric machine. | 05-28-2015 |
| 20150145363 | MAGNETIC WHEEL BEARING - An active magnetic wheel bearing including at least two electromagnetic units arranged to support a wheel hub flange of a vehicle within a bearing outer ring. The active magnetic wheel bearing requires little change to surrounding known structure of the wheel hub flange unit. In addition a method of control and operation of the magnetic wheel bearing is presented. | 05-28-2015 |
| 20150300407 | ELECTRONIC MAGNETIC BEARING CONTROLLER WITH AN AUTOMATIC REACTIVE POWER COMPENSATION DEVICE - An electronic magnetic bearing controller for controlling the position of a rotor of an electrical machine supported by an active magnetic bearing the position of which being measured by at least one inductive position sensor having an inductive coil, comprising an automatic reactive power compensation device for automatically compensating the reactive power consumed by the inductive position sensor. | 10-22-2015 |
| 20150300448 | FLYWHEEL - A computer controlled support and stabilisation unit comprising of a vertical array of magnets for levitating a flywheel containing fluid, a computer controlled adjustable bearing support means that can clamp and unclamp the rotating centre shaft of a flywheel containing fluid between a plurality of bearings, a computer controlled adjustable magnetic lifting support means for lifting the flywheel containing fluid to reduce the forces placed on the vertical array of magnets for levitating a flywheel containing fluid and reduce the forces placed on the plurality of bearings clamping the rotating centre shaft of a flywheel containing fluid. | 10-22-2015 |
| 20150303768 | PROPULSION AND CONTROL FOR A MAGNETICALLY LIFTED VEHICLE - Electromechanical systems using magnetic fields to induce eddy currents and generate lift are described. Magnet configurations which can be employed in the systems are illustrated. The magnet configuration can be used to generate lift and/or thrust. Lift and thrust predictions for various magnet configurations are provided. Arrangements of hover engines, which can employ the magnet configurations, and an associated guidance, navigation and control system, are described. Finally, a number of different applications, such as trains, elevators and printing, which utilize embodiments of the electromechanical systems described herein, are presented. | 10-22-2015 |
| 20150316097 | THRUST MAGNETIC BEARING FOR BIAS COMPENSATION - The present invention relates to a thrust magnetic bearing for bias compensation, and more particularly, to a thrust magnetic bearing for bias compensation in which annular permanent magnets and electromagnets are disposed to face each other with respect to a levitated member and the permanent magnets are formed to be asymmetrical in lengths thereof in an axial direction to thus exert an attractive force for compensating for a bias by the difference in the lengths of the permanent magnets in the axial direction to compensate for the bias, and a current supply for bias magnetic flux is not required, saving energy. | 11-05-2015 |
| 20150330444 | SYMMETRICAL ELECTROMAGNETIC ACTUATOR - A system includes a body having a rotational axis. The system also includes an electromagnetic actuator radially offset from the body and configured to support the body to rotate about the rotational axis. The electromagnetic actuator includes a radial pole assembly magnetically coupled to and cooperating with a radial actuator target to define a radial magnetic control circuit, a first axial pole assembly magnetically coupled to and cooperating with a first axial actuator target to define a first axial magnetic control circuit, and a second axial pole assembly magnetically coupled to and cooperating with a second axial actuator target to define a second axial magnetic control circuit. The structural arrangement of the radial pole assembly and the first and second axial pole assemblies is symmetrical about a radial midplane through the radial pole assembly, wherein the radial midplane is orthogonal with respect to the rotation axis of the body. | 11-19-2015 |
| 20150354627 | ACTIVE MAGNETIC BEARING COILS ROLLED IN SERIES - An axial magnetic bearing comprising a rotor stop disc which is mounted perpendicularly and integral with a rotating shaft and a coaxially stator assembly and comprising at least one stator element of magnetic material having an inner face parallel to a side of the rotor stop disc and separated from it by an air gap, the at least one stator element comprising two annular coils and housed in two annular notches formed continuously in the magnetic material of the at least one stator element and opening to the side of the rotor stop disc, the two annular notches being separated by an annular tooth, rolled in series and are formed by a single continuous wire, a bridging recess being cut in the annular tooth for receiving a massive insert part that extends the annular tooth without locally modifying the air gap with the rotor stop disc. | 12-10-2015 |
| 20150362015 | Device and Method for Magnetically Axially Supporting a Rotor - The invention relates to a device ( | 12-17-2015 |
| 20160036294 | LAMINATED CORE FOR A MAGNETIC BEARING HAVING INDIVIDUAL LAMINATIONS WITH AT LEAST ONE PHYSICAL INTERRUPTION AND METHOD FOR CONSTRUCTING SUCH A LAMINATED CORE - The core inside a combined radial-axial magnetic bearing is stacked with coated laminations each equipped with at least one radial cut. These cuts prevent the inducement of circulating currents caused by varying axial control fluxes through the central hole of the stack. Magnetic symmetry is preserved by pivoting every lamination with respect to the previous one over a particular angle. This arrangement not only reduces the losses in the bearing, but improves the performance of the axial channel as well. | 02-04-2016 |
| 20160036310 | Magnetic Levitation Electrical Generator - A device for generating an electric charge, having: a base; at last one capacitor; at least one magnet; a cover; a splitter; a load; a conductive core; a frictionless surface; and at least one discharge point. The at least one capacitor adapted and configured to store electricity generated from the electric charge. The splitter is adapted and configured to receive a first portion of electricity from the conductive core and divert a second portion of electricity back to the at least one capacitor and further divert a third portion of electricity to the load. The load is adapted and configured to store electricity and use a fraction of the total electricity generated by the device. The at least one magnet is adapted and configured to levitate and rotate on an electromagnetic rail around said conductive core in an infinite loop, wherein said rotation causes a magnetic field. | 02-04-2016 |
| 20160065098 | MAGNETIC LEVITATION DEVICE FOR PROLONGED ROTATION - Disclosed is a magnet in a high vacuum tube levitated by at least one magnet outside the tube and stabilized by at least one diamagnet inside or outside the tube. The magnet may have a rotational symmetry axis aligned with the magnetization axis and the diamagnet may be laminated to minimize eddy-current damping. The magnet or magnets outside the tube are used to control the levitation position and to temporarily bring the magnet into contact with a part of the tube structure. Contact is used in combination with a rotor to initiate the spinning motion of the magnet. The passively spinning and levitating magnet will continue to spin for an unusually long period of time due to the lack of contact and extremely low air drag and eddy-current friction. | 03-03-2016 |
| 20160084304 | MAGNETIC BEARING PROTECTION DEVICE - A radial magnetic bearing may include an annular housing including a radial outer wall disposed between radially outer ends of two annular axial end plates and an isolation sleeve which may include a helical arrangement of a plurality of ferromagnetic wires. The isolation sleeve may be an annular structure extending axially between the two annular axial end plates, and the isolation sleeve and the annular housing may define an isolation cavity therebetween. The radial magnetic bearing may also include an isolation sleeve retainer configured to maintain a position of the isolation sleeve between the two annular axial end plates. The radial magnetic bearing may further include a plurality of laminations disposed adjacent the isolation sleeve and about a shaft of the rotating machine. A gap may be defined between the plurality of laminations and the isolation sleeve. | 03-24-2016 |
| 20160084315 | ELECTROSTATIC STABILIZER FOR A PASSIVE MAGNETIC BEARING SYSTEM - Electrostatic stabilizers are provided for passive bearing systems composed of annular magnets having a net positive stiffness against radial displacements and that have a negative stiffness for vertical displacements, resulting in a vertical instability. Further embodiments are shown of a radial electrostatic stabilizer geometry (using circuitry similar to that employed in the vertical stabilizer). This version is suitable for stabilizing radial (lateral) displacements of a rotor that is levitated by annular permanent magnets that are stable against vertical displacements but are unstable against radial displacements. | 03-24-2016 |
| 20160102704 | ROTATION-SPEED-INDEPENDENT STABILIZER FOR PASSIVE MAGNETIC BEARING SYSTEMS - By employing a combination of magnetic forces and those from electrostatic fields, a new stabilizer is able, unlike those employing dynamic effects, to function at any speed with no need for sensors or dynamically generated electrical currents. Embodiments are provided that stabilize the radial, axial and tilt instability. In addition to its use for stabilization, the radial stabilizer described herein also functions as an eccentricity detector. | 04-14-2016 |
| 20160102705 | ROTATING MACHINE WITH AT LEAST ONE ACTIVE MAGNETIC BEARING AND AUXILIARY ROLLING BEARINGS - A rotating machine comprises a shaft, a casing, at least one main magnetic bearing connected to the shaft for rotatably supporting the shaft inside the casing, at least one auxiliary radial rolling bearing and at least one auxiliary axial rolling bearing which are disposed between the shaft and the casing to respectively support radial loads only and axial loads only. | 04-14-2016 |
| 20160102712 | ELECTRO-MAGNETIC BEARING ASSEMBLY WITH INNER VENTILATION TO COOL THE BEARING - A magnetic bearing assembly for a rotary machine, having a rotor circuit and a stator magnetic circuit secured to a stationary support element having at least one body of ferromagnetic material and at least one coil, both being fitted in a protective annular housing leaving uncovered a surface of revolution of said ferromagnetic body and a surface of revolution of said one coil facing a surface of revolution of the rotor circuit. The bearing assembly comprises at least one row of blades secured on the rotor circuit. | 04-14-2016 |
| 20160108957 | MAGNETIC BEARING HAVING PERMANENT MAGNET ASSEMBLIES WITH REPULSIVE BEARING SURFACES - The magnetic bearings make use of magnet assemblies with a high magnetic field gradient. The magnet assemblies use two permanent magnets with opposite polarisation in a Kittel open domain structure. The basic factor of magnetic separation is the magnetic force, which acts on a particle of the substance and which is proportional to the magnetic susceptibility of the substance, the value of the magnetic induction B and the value of the gradient āB of the applied magnetic field. Therefore, increasing the sensitivity and selectivity of magnetic separation will require use of the highest possible values of magnetic induction B and magnetic field gradient āB, or their united factorāthe product BāB. The magnetic assembly have repulsive magnetic systems each having two juxtaposed permanent magnets | 04-21-2016 |
| 20160108967 | MAGNETIC BEARING ASSEMBLY HAVING INNER VENTILATION - A magnetic bearing assembly for a rotary machine having a rotor shaft, comprising a stator magnetic circuit secured to a stationary support element and comprising at least one body of ferromagnetic material and at least one coil, both being fitted in a protective annular housing leaving uncovered a surface of revolution of said ferromagnetic body and a surface of revolution of said one coil, the magnetic bearing assembly comprising an annular thrust collar secured to the rotor shaft and radially extending towards the stator magnetic circuit by a radial portion, said radial portion facing the uncovered surfaces of said ferromagnetic body and said one coil. The annular thrust collar comprises at least one flow channel. | 04-21-2016 |
| 20160123387 | PASSIVE MAGNETIC BEARING SYSTEMS STABILIZER/BEARING UTILIZING TIME-AVERAGING OF A PERIODIC MAGNETIC FIELD - A high-stiffness stabilizer/bearings for passive magnetic bearing systems is provide where the key to its operation resides in the fact that when the frequency of variation of the repelling forces of the periodic magnet array is large compared to the reciprocal of the growth time of the unstable motion, the rotating system will feel only the time-averaged value of the force. When the time-averaged value of the force is radially repelling by the choice of the geometry of the periodic magnet array, the Earnshaw-related unstable hit motion that would occur at zero rotational speed is suppressed when the system is rotating at operating speeds. | 05-05-2016 |
| 20160123388 | ROTATING MACHINE WITH AT LEAST ONE ACTIVE MAGNETIC BEARING AND SPACED AUXILIARY ROLLING BEARINGS - A rotating machine comprises a shaft, a casing, at least one main magnetic bearing connected to the shaft for rotatably supporting said shaft inside the casing, at least one first and one second auxiliary rolling bearings positioned between the shaft and the casing to support axial and radial loads, and first and second axial abutment means positioned on the shaft to transmit axial loads to inner rings of the rolling bearings. The machine further comprises a spacer axially positioned between facing faces of the inner rings of said rolling bearings for the transmission of the axial loads between said inner rings, and at least a first axial retaining means positioned on the casing and located axially between facing faces of the outer rings for the transmission of the axial loads between at least one of said outer rings and the casing. | 05-05-2016 |
| 20160146247 | MACHINE AND METHOD FOR MONITORING THE STATE OF A SAFETY BEARING OF A MACHINE - In a method for monitoring a state of a safety bearing of a rotor shaft of a machine, with the rotor shaft being supported by a magnetic bearing and the safety bearing having an outer ring and an inner ring arranged for rotation with respect to the outer ring, the rotor shaft of the machine is caught with the safety bearing when the magnetic bearing of the machine fails. The magnetic bearing is witched off for monitoring the state of the safety bearing. The rotor shaft is rotated with the machine under control of a higher-ranking controller by using a defined motion sequence, and a physical variable of the safety bearing is measured with a sensor. | 05-26-2016 |
| 20160150304 | MAGNETIC LEVITATION AUDIO DEVICE - A magnetic levitation audio device is disclosed. The magnetic levitation audio device comprises a magnetic levitation base capable of generating a magnetic field and a sound box levitated above the magnetic levitation base through a magnetic force. The magnetic levitation base comprises a base enclosure, an electromagnetic induction module disposed in the base enclosure, a PCB board and position indicator lamps, with the electromagnetic induction module and the position indicator lamps being electrically connected with the PCB board respectively; and the sound box comprises an enclosure, a magnet assembly disposed in the enclosure, a power supply module, an audio module, and a switch unit capable of sensing an instantaneous air flow. The present disclosure can control the sound box | 05-26-2016 |
| 20160153491 | NON-CONTACTING "SNUBBER BEARING" FOR PASSIVE MAGNETIC BEARING SYSTEMS | 06-02-2016 |
| 20160153492 | MAGNETIC BEARING, APPARATUS COMPRISING SUCH A MAGNETIC BEARING AND METHOD FOR MANUFACTURING SUCH A MAGNETIC BEARING | 06-02-2016 |
| 20160164371 | REDUCING BEARING FORCES IN AN ELECTRICAL MACHINE - A rotary coupling ( | 06-09-2016 |
| 20160169280 | SELF-SENSING ACTIVE MAGNETIC BEARING SYSTEMS AND METHODS | 06-16-2016 |
| 20160178005 | MAGNETIC BEARING, ROTARY APPARATUS COMPRISING SUCH A MAGNETIC BEARING AND METHOD FOR MANUFACTURING SUCH A MAGNETIC BEARING | 06-23-2016 |
| 20160195132 | METHOD FOR COMPENSATING A LOW-FREQUENCY DISTURBANCE FORCE OF A ROTOR BY MEANS OF ACTIVE MAGNETIC BEARINGS, ACTIVE MAGNETIC BEARING HAVING A COMPENSATION CONTROL CIRCUIT FOR PERFORMING THE COMPENSATION, AND USE OF THE MAGNETIC BEARING | 07-07-2016 |
| 20160201722 | RADIAL ELECTRODYNAMIC BEARING | 07-14-2016 |
| 20160250945 | MAGNETICALLY LIFTED VEHICLES USING HOVER ENGINES | 09-01-2016 |
| 20160252099 | MAGNETIC BEARING DEVICE, AND VACUUM PUMP HAVING SAME | 09-01-2016 |
| 20170234363 | MAGNETIC BEARING AND METHOD TO BUILD CONTROL MODELS FOR MAGNETIC BEARINGS | 08-17-2017 |
| 20170234364 | MAGNETIC BEARING | 08-17-2017 |
| 20180023938 | CENTER ERROR VALUE OF BEARINGS MEASURING METHOD | 01-25-2018 |
