Entries |
Document | Title | Date |
20080203842 | MOTOR - A motor includes a stator formed of a stator iron-core having salient pole iron-cores and windings, and a rotor having a rotor iron-core in which permanent magnets are buried. A magnetic pole centerline connecting a rotary center of the rotor to a magnetic pole center crosses an external shape of the rotor iron-core at end point X, and the magnetic-pole boundary line connecting the rotary center to a magnetic pole boundary point crosses the external shape of the rotor iron-core at end point Z. A straight line angled at a given angle θa from the magnetic pole centerline has end point A. Then a sectional view of the rotor iron-core shows an arc drawn between the end points X and A, and the arc's center is the rotary center. The end points A and Z are connected by one or more than one straight lines in series. | 08-28-2008 |
20080246361 | POWER GENERATION DEVICE - A device with the ability to harness electrical power utilizing magnetic arrays and electrically charged particulate to produce electrical power is provided. The present invention provides a device and system whereby the device may utilize a magnetic array to produce a electronic field that may collected in the form of electric energy. Moreover, the present invention provides a device having power generation effects whereby the device utilizes an arrangement of magnets on a magnetic array and a voltage ring having an input and an output connection to allow for discharge of collected electrical energy. | 10-09-2008 |
20080258572 | Variable Reluctance Dynamo-Electric Rotary Machine Provided with United Magnetic, Electric and Polarising Circuits and Method for Production Thereof - A monophase transverse circuit has two rows of cylindrical air gaps which are provided with conductors between terminal pairs of a machine of an EP 1 063 754 type. By anamorphic transformation according to figures, the terminal pairs are rotated at a quarter turn in order to come to FIG. | 10-23-2008 |
20080272665 | High Precision Motor and Its Machining and Assembling Method - A motor includes a stator, a rotor, a shaft ( | 11-06-2008 |
20080290751 | Brushless permanent magnet motor with unequal-width slots and method of producing the same - A brushless permanent magnet motor with unequal-width slots and its manufacturing method completes a design of a regular motor with equal-width slots, employs a single-layer centralized winding, increasing the width equally on left and right sides of a first type of teeth wound with a coil until a width W | 11-27-2008 |
20090001835 | Axial air gap type electric motor - An axial air gap type electric motor is constructed such that even if a relatively large force is added in the vertical direction to the rotor output, the bearings are protected against damage. The axial air gap type electric motor includes a stator and two rotors each of which is configured almost with a discoid shape and which are arranged as facing one another on a common rotation axle with a fixed gap being present therebetween. The stator has a stator core comprising multiple pole members connected annularly. One of the bearings for fixing the rotor output axle is installed inside the stator configured annularly and another bearing is installed on the rotor output axle between the outside of said rotor and the load connected. | 01-01-2009 |
20090009019 | ELECTRIC MOTOR - Having a stator core including a yoke, a plurality of inside teeth, and a plurality of outside teeth, an inside rotor, and an output rotor, the inside slot open angle/inside pole angle and the outside slot open angle/outside pole angle are determined so that the inside cogging torque due to rotation of the inside rotor and the outside cogging torque due to rotation of the outside rotor may cancel each other in inverted phases. Plural combinations are provided so that the amplitude of inside cogging torque and the amplitude of outside cogging torque due to rotation of outside rotor maybe approximate values in inverted phase, and the combination of the highest combined voltage value of the both induced voltage is selected. | 01-08-2009 |
20090015089 | PERMANENT-MAGNET SWITCHED-FLUX MACHINE - A permanent-magnet switched-flux (PMSF) device has a ferromagnetic outer stator mounted to a shaft about a central axis extending axially through the PMSF device. Pluralities of top and bottom stator poles are respectively mounted in first and second circles, radially outwardly in first and second transverse planes extending from first and second sections of the central axis adjacent to an inner surface of the ferromagnetic outer stator. A ferromagnetic inner rotor is coupled to the shaft and has i) a rotor core having a core axis co-axial with the central axis; and ii) first and second discs having respective outer edges with first and second pluralities of permanent magnets (PMs) mounted in first and second circles, radially outwardly from the rotor core axis in the first and second transverse planes. The first and second pluralities of PMs each include PMs of alternating polarity. | 01-15-2009 |
20090026865 | Motor and Its Rotor and Magnetic Core for Rotor - A first non-magnetic portion, a second non-magnetic portion, and a third non-magnetic portion are arranged around an axis, from an end toward the center of a permanent magnet burying hole. A fourth non-magnetic portion is further provided between the second non-magnetic portion and the third non-magnetic portion. Angles around the axis are determined as follows with reference to a position between permanent magnet burying holes. The position between the first non-magnetic portion and the second non-magnetic portion is expressed by a first angle. The position between the third non-magnetic portion and the fourth non-magnetic portion is expressed by a second angle, and the second angle is twice the first angle. The end of the third non-magnetic portion located closer to the pole center is expressed by a third angle. The first angle and the third angle are values obtained by dividing 360 degrees respectively by a value that is seven times, and a value that is three times, the number of the permanent magnet burying holes. | 01-29-2009 |
20090033166 | BRUSHLESS MOTOR - The brushless motor includes a stator having a electromagnetic coil and a position sensor; an axis fixed to the stator; and a rotor having a permanent magnet. The rotor rotates around the axis. The rotor is linked to a driven member that is driven by the brushless motor. | 02-05-2009 |
20090108693 | MOTOR AND WASHING MACHINE USING THE SAME - Disclosed is a motor which includes a stator including a plurality of aluminum coils and a rotor. The rotor includes a frame including a magnetic material, and a permanent magnet attached to the frame. The permanent magnet is made of neodymium. | 04-30-2009 |
20090189471 | Spindle Motor - A spindle motor having a stator and a rotor includes: a stator core provided in the stator having salient-poles; a stator coil arranged between the salient-poles; a rotor; and a permanent magnet provided in the rotor. The stator core includes a stack of steel sheets whose salient-poles are formed by etching. The permanent magnet includes a ferromagnetic material consisting mainly of iron. The ferromagnetic material has formed in laminae on a surface thereof a layer of a fluorine compound containing an alkali element, an alkaline earth element or a rare earth element formed in laminae. Near an interface between the ferromagnetic material and the layer of the fluorine compound, iron exists in the layer of the fluorine compound such that a basic crystal structure of the fluorine compound is not changed and the fluorine compound containing the iron exists in the layer of the fluorine compound. | 07-30-2009 |
20090206691 | MOTOR - A motor includes a rotor core, permanent magnets and non-magnetic layers. The permanent magnets are embedded in the rotor core with each of the permanent magnets defining a pole of the rotor having a pole center and a peripheral edge section, with the peripheral edge section located in a vicinity between the poles and a vicinity of the rotor surface. The non-magnetic layers are located in a vicinity of the rotor surface at a pole center side position with respect to the peripheral edge section of each of the permanent magnets. The peripheral edge sections and the non-magnetic layers are positioned to cancel 5-th or 7-th order harmonics of an induction voltage. The poles are disposed at every approximately constant interval, varying in a constant angle. The peripheral edge sections and the non-magnetic layers are independent from one another, and the rotor core is interposed between them. | 08-20-2009 |
20090212651 | MOTOR AND DISK DRIVE APPARATUS - A motor for holding a disk with a mounting opening in place includes a rotor unit including a rotor magnet rotatable about a central axis and a stator unit including a stator arranged opposite to the rotor magnet and a circuit board electrically connected to the stator. Wiring lines of the circuit board include output-side land portions electrically connected to first ends of coils of the stator, a connection-side land portion electrically connected to second ends of the coils forming a neutral point, a connection portion electrically connected to an external power source, output-side wiring portions arranged to electrically interconnect the output-side land portions and the connection portion, and a connection-side wiring portion arranged to electrically interconnect the connection-side land portion and the connection portion. Each of the output-side wiring portions has a width greater than a width of the connection-side wiring portion. | 08-27-2009 |
20090251020 | Permanent magnet dynamoelectric machine with variable magnetic flux excitation - A permanent magnet (PM) dynamoelectric machine with directly controllable field excitation control comprises: a drive shaft; a PM rotor assembly with multiple PMs arranged around an outer axial periphery of the rotor assembly; a stator assembly comprising a ferromagnetic stator yoke, multiple ferromagnetic stator teeth mounted to the stator yoke with distal ends proximate the outer axial periphery of the rotor assembly separated by an air gap and multiple stator coils mounted between the stator teeth; multiple saturable ferromagnetic shunts, each shunt coupling adjacent distal ends of the stator teeth to shunt air gap magnetic flux Φ | 10-08-2009 |
20090261675 | HIGH EFFICIENT MAGNETIC ENERGY SHIFTING DEVICE - A high efficient magnetic energy shifting device includes at least a magnetism unit consisting of plural induction coils and at least a magnetic element. Each of the induction coils is provided with plural individual coils formed by having wire coaxially wound in a same direction, an opening formed in the center of the individual coils and an induction stage formed around the outer surface of the individual coils. The induction coils are successively arrayed and fixed stably by positioning elements. The magnetic element is located at a position corresponding to a maximal surface of the induction stage so as to create a high voltage in a same unit area or kinetic energy under a low current, achieving a purpose of high efficient energy shift. | 10-22-2009 |
20090309446 | ELECTRIC ARC WELDING SYSTEM POWERED BY PERMANENT MAGNET ELECTRIC GENERATOR - An electric arc welding system is powered by a power generator with a rotor assembly circumferentially surrounding a stator assembly. The arc welding system generates a three phase AC current, which is converted into a DC current by a converter. An electrode coupled to the converter receives the DC current, wherein a welding arc is created between the electrode and a workpiece. A controller is coupled to the converter. The controller is operable to apply a control signal to the converter to cause the converter to vary the magnitude of the DC current. | 12-17-2009 |
20090322173 | Electromagnetic machine with magnetic gap channels - An electromagnetic machine has a moving component, a stationary component, and a support component coupling the moving and stationary components in physical and electromagnetic proximity. The stationary component is a wound coil of insulated, electrically conductive tape defining a side face which has a plurality of spaced apart channels in it. The coil carries an electric current so that its opposite faces are north and south electromagnet pole faces and these pole faces are interrupted with spaced apart channels. The moving component is made up of a plurality of permanent magnets arranged in north-to-south pole alignment sequence and spaced apart. Non-magnetic pole surfaces of the magnets are positioned in close mutual proximity to the coil pole face. Electromotive forces are produced by electromagnetic interaction between the coil channels and the permanent magnet pole faces. | 12-31-2009 |
20100007232 | Sintered Magnet Motor - Disclosed herein is a sintered magnet motor having a sintered magnet rotor, the rotor comprising: a ferromagnetic material comprising iron as a main ingredient to be sintered; a fluorine compound or an oxyfluoride compound formed in the inside of a crystal grain or to a portion of a grain boundary of the ferromagnetic material; and at least one of alkalis, alkaline earth elements, and rare earth elements contained in the fluorine compound or the oxyfluoride compound; a portion of the fluorine compound or the oxyfluoride compound being distributed with a concentration gradient established from the surface to the inside of the ferromagnetic material, and a rare earth element being distributed with a concentration gradient established between the grain boundary surface and the parent phase of the ferromagnetic material, wherein the concentration distribution of the fluorine compound is asymmetrical when viewed from the pole center of the sintered magnet rotor. The amount of use of a fluorine compound can be decreased in this sintered magnet motor. | 01-14-2010 |
20100045131 | ELECTRIC MOTOR - It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M. | 02-25-2010 |
20100052452 | Rotor For Electric Motor - A rotor for an electric motor ( | 03-04-2010 |
20100066188 | Brushless motor - Teeth of a stator core are arranged one after another in the circumferential direction at alternating first and second pitches. Each corresponding adjacent two of the teeth, which are spaced from each other by the first pitch, are wound with corresponding two, respectively, of stator coils, which form a corresponding common phase. Each corresponding adjacent two of the teeth, which are spaced from each other by the second pitch, are wound with corresponding two, respectively, of the stator coils, which form corresponding different phases, respectively. | 03-18-2010 |
20100079024 | Rotating Machine with Sintered Magnet and Method for Producing Sintered Magnet - A rotating machine is equipped with a sintered magnet. The sintered magnet includes: a ferromagnetic material consisting mainly of iron; a layer of a fluoride compound or a layer of an oxyfluoride compound formed inside crystal grains or in a portion of grain boundary area of the ferromagnetic material; at least one element selected from the group consisting of alkalis, alkaline earth elements, and rare earth elements and carbon contained in the layer of the fluoride compound or the layer of the oxyfluoride compound; and a continuously extending layer formed by a portion of the layer of the fluoride compound or the layer of the oxyfluoride layer, the continuously extending layer extending from a surface of the ferromagnetic material through the inside of the ferromagnetic material to an opposite side surface of the ferromagnetic material. A ratio of an average concentration of fluorine in an area within 100 μm from the surface of the ferromagnetic material to an average concentration of fluorine in an area including a central part at a distance of at least 100 μm is in the range of 1±0.5, and a concentration gradient of the rare earth elements is present in a matrix near the grain boundary of the ferromagnetic material. | 04-01-2010 |
20100084937 | MOTOR WITH LOBED ROTOR HAVING UNIFORM AND NON-UNIFORM AIR GAPS - A motor having a rotor including first outer surface segments providing uniform air gaps and second outer surface segments providing non-uniform air gaps. The rotor has an outer surface contour comprising a number of first outer surface segments defined by arcs having a first radius centered on a central longitudinal axis and a number of second outer surface segments defined by lines other than arcs having a first radius centered on a central longitudinal axis. | 04-08-2010 |
20100090554 | OUTER-ROTOR BRUSHLESS MOTOR - An outer-rotor brushless motor is smaller, flatter, and lighter but has no drop in motor performance. A motor substrate on which a motor driving circuit is formed is fixed to a bracket in a space formed in the axial direction between (i) a rotor and a stator and (ii) an opening bottom portion of the bracket. | 04-15-2010 |
20100187931 | High Power Rotary Device - A high power rotary device includes a stator comprising a plurality of wire coils each surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a position sensor operably connected to the rotor; and a control circuit operably connected to the position sensor and the wire coils to activate the wire coils. In this motor the control circuit transfers electrical charge from a first coil to a second coil. | 07-29-2010 |
20100219709 | CIRCULAR SELF-POWERED MAGNETIC GENERATOR - An improved power generation apparatus | 09-02-2010 |
20100244605 | PERMANENT MAGNET TYPE ROTATING ELECTRICAL MACHINE AND ELECTRIC POWER STEERING DEVICE - A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is h | 09-30-2010 |
20100253169 | ELECTRIC MACHINE - An interior permanent magnet machine is disclosed. The machine comprises an air gap, and a rotor comprising a plurality of multilayered magnets each placed substantially along circumferential chords of the air gap, wherein each of the magnets comprises a plurality of segments and at least one segment adjacent said air gap comprises a high resistivity magnetic material. A method to make an interior permanent magnet machine is also disclosed. | 10-07-2010 |
20100253170 | LOW PROFILE SPINDLE MOTOR - A low profile spindle motor for supporting and rotating media disk or disks of a hard disk drive includes a plurality of stator teeth, a winding layer which may be formed by printed circuit board or the like, and a rotor. The plurality of stator teeth are disposed in an annular region surrounding an axis of rotation of the motor, and have projected ends for increasing the tooth area facing a magnet ring of the rotor. The winding layer has a plurality of windings disposed surrounding the axis of rotation. Each winding is coupled to one of the plurality of stator teeth. The magnet ring is positioned radially spaced apart and coplanar with the annular region. The magnet ring has magnetic poles annularly distributed to generate magnetic fluxes along radial direction. Spindle motor formed according to the invention has a low profile, improved performance and manufacturability. | 10-07-2010 |
20100259122 | Magnetic member, motor device, magnetizing method, and storage device - A method of magnetizing a magnetic member for a rotor of a motor device. The magnetic member has a thickness t in the radial direction of the magnetic member satisfying the relation πD/(0.75MP−π)10-14-2010 | |
20100277023 | ONE DIRECTIONAL ELECTRIFICATION-TYPE BRUSHLESS DC MOTOR PROVIDED WITH AC VOLTAGE OUTPUT WINDING AND MOTOR SYSTEM - [Problem] The invention provides a unidirectionally-energized brushless DC motor including an AC voltage output winding, and the brushless DC motor simultaneously exerts a motor function of being able to continuously obtain a constant torque and a power generation function of being able to obtain a continuous electromotive force. | 11-04-2010 |
20100289365 | ELECTRIC MOTOR AND ROTOR FOR ROTATING ELECTRIC MACHINE - An electric motor (M) includes first and second stators ( | 11-18-2010 |
20100289366 | Rare Earth Magnet and Motor Using the Same - The present invention makes it possible to increase the residual magnetic flux density and the coercive force of a rare earth magnet; and raise the Curie temperature. In a magnet formed by compressing magnetic particles, the surface of a magnetic particle is covered with a metal fluoride film, the magnetic particle has a crystal structure containing a homo portion formed by bonding adjacent iron atoms and a hetero portion formed by bonding two iron atoms via an atom other than iron, and the distance between the two iron atoms in the hetero portion is different from the distance between the adjacent iron atoms in the homo portion. | 11-18-2010 |
20100295400 | METHOD FOR PRODUCING A ROTOR ASSEMBLY FOR A ROTATING ELECTRICAL MACHINE, ESPECIALLY AN ALTERNATOR - A method for producing a rotor assembly for a rotating electrical machine, especially an alternator, the rotor assembly including two rotors defining between themselves at least one inter-rotor space suitable for accommodating at least one magnet structure, which includes at least one index mark. The magnet structure is positioned against at least two of the rotors, using the index mark to identify a direction of orientation of the magnetization of the magnet structure. | 11-25-2010 |
20100301695 | Rotor and Motor - A motor includes a rotor and a stator. The rotor includes a plurality of magnets, which function as first magnetic poles, and salient poles, which function as second magnetic poles. A ratio X | 12-02-2010 |
20100314962 | Three-Phase Brushless DC Motor - An object of the present invention is to provide a three-phase brushless DC motor providing a high torque and performs stable operations which can be used even when an installation space is restricted. To achieve the object, the present invention adopts an inner rotor-type three-phase brushless DC motor in which an inner rotor-type three-phase brushless DC motor comprising a rotor provided with a plurality of magnetic poles divided equally in a circumferential direction at an outer peripheral of the rotor and a stator separately arranged along an outer peripheral of the rotor, wherein the stator is provided with M−n (wherein, n is an integer equal to or larger than 1) of stator sections each provided with three stator poles each having different phases, and the relationship between number of magnetic poles provided in the rotor and the total number of stator poles is made different from the conventional one. | 12-16-2010 |
20110012461 | Permanent Magnet Synchronization Motor | 01-20-2011 |
20110025158 | ROTATING ELECTRICAL MACHINE - In a rotating electrical machine, when a stator winding is wound in concentrated winding, an improvement in performance is achieved by reducing a magnetomotive force harmonic without reducing a fundamental wave magnetic flux generated by a stator. A rotating electrical machine ( | 02-03-2011 |
20110050020 | ELECTRONIC MACHINES WITH COMPOSITE POLES - An electric motor or generator consists of a stator carrying pole pieces and their coacting coils, the stator being surrounded on one side by the field creating permanent magnets adjacent one face of the poles and on the other by a flux return path element positioned adjacent the other face of the poles. The stator coils are preferably bobbin mounted. | 03-03-2011 |
20110133589 | LOW PROFILE PERMANENT MAGNET SYNCHRONOUS MOTOR WITH SEGMENT STRUCTURE - A low profile permanent magnet synchronous motor with segment structure. In accordance with this invention, a stator assembly for an electromagnetic motor is provided. The stator assembly has a first stator core and a second stator core that couple windings. Teeth extend outward from each stator core and through the windings to contact the other stator core. | 06-09-2011 |
20110148239 | BRUSHLESS MOTOR - A brushless motor includes: a stator assembly including a stator core which includes a plurality of pole teeth each having a winding therearound; and a rotor assembly including a magnet which has a ring shape, is rotatably disposed so as to oppose the pole teeth of the stator core and which is circumferentially magnetized with a plurality of magnetic poles with opposite polarities alternating with each other, wherein the number of the pole teeth of the stator core is twice the number of the magnetic poles of the magnet such that each magnetic pole opposes a pair of adjacent pole teeth, one pair of adjacent windings have the same number of winding turns and the same winding direction as each other, and wherein another pair of windings located next to the one pair of windings have a winding direction opposite to the winding direction of the one pair of windings. | 06-23-2011 |
20110169363 | Variable Speed Electric Motor/Generator - The present invention is an electric energy converter for converting between mechanical and electric energy. The energy converter is operable at a high efficiency over a very wide rpm band. The energy converter includes a first peripheral magnetic field element (magnet) having a north pole and a second peripheral magnetic field element (magnet) having a south pole, the north pole of the first peripheral magnet being aligned with the south pole of the second peripheral magnet. The energy converter also includes a central magnetic field element (magnet) positioned between the first and second peripheral magnets, the central magnet having opposite north and south poles, the central magnet being oriented such that the north pole of the central magnet is aligned with the north pole of the first peripheral magnet and the south pole of the central magnet is aligned with the south pole of the second peripheral magnet. The energy converter also includes an armature comprising a plurality of parallel pairs of linear coils positioned between the peripheral magnets with the central magnet positioned between each pair of linear coils. | 07-14-2011 |
20110169364 | ROTOR FOR USE IN IPM ROTATING ELECTRIC MACHINE, AND IPM ROTATING ELECTRIC MACHINE PROVIDED WITH THE ROTOR - A rotor includes a rotor core; and first permanent magnets and second permanent magnets arranged in the rotor core so that, on a cross-sectional plane of the rotor core perpendicular to the rotation axis thereof, the first and second magnets corresponding to each other define the letter V having an apex pointing toward the rotation axis. The first and second magnets corresponding to each other are arranged so that a straight line interconnecting the rotation axis and the apex of the letter V is interposed therebetween, an angle of the first magnet relative to the straight line being smaller than that of the second magnet relative to the straight line, a width of the first magnet in the direction parallel to the first side of the letter V being smaller than that of the second magnet in the direction parallel to the second side of the letter V. | 07-14-2011 |
20110175478 | PERMANENT MAGNET ELECTRIC MOTOR - An increase of the magnetization current can be restrained during demagnetization and magnetization, and a variable speed operation can be achieved at a high power output over a wide range of from a low speed to a high speed. A rotor | 07-21-2011 |
20110175479 | PERMANENT MAGNET ROTOR - A permanent magnet rotor for a brushless electric motor of the kind with an internal stator, has a carrier structure of molded plastic that includes a disc portion fixed to a shaft. The disc portion has a periphery joined to a substantially cylindrical cage portion coaxial with the shaft. The cage portion accommodates a magnetic flux conducting structure forming an wall which is coaxial with the shaft, and a plurality of permanent magnets shaped as ring segments, disposed at angular intervals within and adjacent to the flux conducting structure. Each magnet has its circumferentially terminal faces parallel with each other or converging in the outward direction. The cage portion is overmolded onto the flux conducting structure and has a plurality of angularly spaced struts which are essentially parallel to the axis of the rotor and which protrude radially inwards. Each of the struts having on its flanks respective containment surfaces which are essentially parallel to, or converge in the outward direction with, corresponding facing surfaces of the adjacent struts, such that between the magnetic flux conducting structure and each pair of adjacent struts there is defined a respective seat adapted to snugly receive a respective permanent magnet. | 07-21-2011 |
20110187218 | METHOD AND APPARATUS FOR ACTIVATING AN ELECTRIC MACHINE, AND ELECTRIC MACHINE - A method of activating an electric machine having a stator, and a rotor which rotates about an axis with respect to the stator; the stator having a plurality of stator segments arranged about the axis; the rotor having modules made of magnetizable material and arranged about the axis; and the method including the steps of connecting the rotor to the stator by means of a bearing; and magnetizing the modules of magnetizable material when the rotor is connected to the stator. | 08-04-2011 |
20110204738 | Method For Estimating The Magnetization Level Of One Or More Permanent Magnets Established In One Or More Permanent Magnet Rotors Of A Wind Turbine Generator And Wind Turbine - A method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator includes the steps of: establishing one or more magnetization sensors at the stator of the generator, connecting the one or more magnetization sensors to a measuring mechanism, processing measured data in the measuring mechanism, and establishing values of magnetization. Furthermore the invention also relates to a wind turbine. | 08-25-2011 |
20110227440 | ELECTRIC MOTOR WITH NO COUNTER ELECTROMOTIVE FORCE - An electromagnetic motor system with no counter/back electromotive force due to the ability of the system to change from one magnetic state to another magnetic state in a defined sequence. In the first state a kinetic energy component is added to the system's rotor where two permanent magnetic materials, which are affixed to the rotor, are allowed to come into an angular range such that they act in a symmetrical manner on a fixed soft ferromagnetic material. This fixed soft ferromagnetic material also acts as the core of an electromagnetic coil and when the rotor's permanent magnets are at the closest proximity to the soft ferromagnetic core a voltage is applied across the coil, resulting in the soft ferromagnetic coil being saturated in a horizontal manner where previously it was polarized in a vertical manner while under the influence of the rotor's two permanent magnets. | 09-22-2011 |
20110241466 | PERMANENT MAGNET SYNCHRONOUS MACHINE, AND PRESSING OR EXTRUSION MACHINE INCLUDING PERMANENT MAGNET SYNCHRONOUS MACHINE - To provide a permanent magnet synchronous machine capable of expanding a high-speed operation range without reducing torque, and a pressing machine or an extrusion machine using the permanent magnet synchronous machine. In order to achieve the object described above, the present invention provides a permanent magnet synchronous electric machine having at least one permanent magnet on a radial surface of a rotor core, the permanent magnet having a rotor constituting a field pole, wherein a plurality of slits constituted by nonmagnetic material is provided on a core part between adjacent permanent magnets with opposite magnetic polarities of the rotor. According to the present invention, expansion of a high-speed operation range can be achieved without reducing torque. | 10-06-2011 |
20110266908 | ROTATING ELECTRIC MACHINE, ESPECIALLY SYNCHRONOUS PERMANENT MAGNET MACHINE - A rotating electric machine, especially synchronous permanent magnet machine, is provided. The machine includes a rotor with a given number of magnets distributed along the circumference and a given number of rotor pole pairs, and further comprising a stator with a given number of stator pole pairs and a given number of stator slots. The efficiency and the power of the machine are improved by making the number of stator pole pairs independent of the number of rotor pole pairs. | 11-03-2011 |
20110273047 | ROTOR LAMINATION ASSEMBLY - An electric machine includes a stator, and a rotor lamination assembly configured to rotate relative to the stator. The rotor assembly includes at least one lamination member that includes a body having an inner diametric edge that extends to an outer diametric edge, and at least one magnet receiving member. The at least one magnet receiving member is formed in the body and includes a first end that extends to a second end. The second end is spaced from the outer diametric edge to form a bridge portion. The at least one lamination member includes at least one stress concentration element positioned between the inner diametric edge and the outer diametric edge. The at least one stress concentration element is configured and disposed to reduce stress in the bridge portion. | 11-10-2011 |
20110285235 | Electro Magnetic Pulse Motor/Generator - An apparatus and method of providing output power from electrical pulse current in a highly efficient configuration. The input pulse current passes through a series of configured and wound input coils specifically positioned in an alternating manner in respect to wound and “tapped” output coils. Current is induced in the output coils in a highly efficient manner and can be output from the apparatus at each layer of winding, reducing resistance to induction. In an embodiment, the apparatus comprises a “power wheel”, a plurality of magnetic nodes spaced evenly over the outer circumference of said power wheel, each of said magnetic nodes having the same magnetic polarity facing radially outward from the center of said power wheel; an electro-magnetic generator, which electromagnetically causes said power wheel to rotate, with alternating layered windings of input coils and output coils such that said output coils are “tapped” at each layer of winding; and a means for switching, in which rotation of said power wheel causes pulse current to be applied to said input coils. | 11-24-2011 |
20110285236 | Rotating machines using trapped field magnets and related methods - Rotors with trapped-field magnet (TFM) bulks, machines with TFM rotors, and methods of activating and/or using machines with TFM rotors. | 11-24-2011 |
20110291513 | Annular Power Converter Having A Motive Effect - The invention relates to an energy conversion apparatus between mechanical and electrical energy. In order to create a new geometry for the important system components of electric motors and electric generators, it is proposed to stationary arrange permanent magnets ( | 12-01-2011 |
20110309705 | MOTOR ROTOR AND A MOTOR HAVING THE SAME - A motor rotor includes an annular body and a plurality of magnetic bodies installed on an inner lateral surface of the annular body in an irregular manner, to prevent a rotating motor from generating a cogging effect, disperse the frequency of the cogging torque, and reduce the amplitude. Accordingly, noises generated while the motor is operating are reduced, the periodicity of a cogging torque is changed, and cogging torque is reduced. | 12-22-2011 |
20120074805 | ROTOR - A rotor includes a hub, a rotor core, holes and permanent magnets. Salient poles are each formed between neighboring openings on a circumference of the rotor core and, when viewed from a front along a line of axis of the rotor, a recessed portion that is formed by causing one portion of an inner circumferential surface of the rotor core to bulge radially outward of another portion is provided in a region enclosed by a first virtual line connecting a center of the hub and a circumferential middle position on the circumference of a magnetic pole of the rotor core having permanent magnets provided therein and a second virtual line connecting the center of the hub and a circumferential middle position on the circumference of the salient pole adjacent to the magnetic pole at a leading side in a rotational direction of the rotor. | 03-29-2012 |
20120074806 | REINFORCED MAGNET - A magnet that includes a composite body and at least one reinforcing element. The reinforcing element is embedded within the body and increases the radial strength of the body. As a result, the magnet is able to rotate at higher speeds without fracturing. Additionally, methods of manufacturing the magnet are described. | 03-29-2012 |
20120086294 | ELECTRIC MACHINE - The device comprises a single circular row of permanent magnetic poles and a circular row of electromagnets, magnetic-force-conducting elements of which have central polar part and two lateral polar parts connected to the central polar part and spaced from opposing (in the direction which is essentially perpendicular to the rotation axis) sides of the central polar part. Winding is situated upon central polar part. The part of winding positioned between the polar parts of the magnetic-force-conducting element is more than half the length of the whole winding. Central polar part may have at least one groove. The distance between the centers of adjacent polar surfaces of the magnetic-force-conducting element is set depending on the angle between the magnetic poles in the circular row. The angular dimension of the polar surface of the lateral polar part depends on the angular dimension of the polar surface of the central polar part. | 04-12-2012 |
20120091845 | BRUSHLESS MOTOR - A brushless motor includes a rotor and a stator. The rotor is provided with a rotor core including a plurality of magnet poles and a plurality of core poles. A void is formed at a boundary between each core pole and an adjacent magnet pole in the circumferential direction. Each magnet pole includes a peripheral core portion located closer to the stator than the magnet in the radial direction of the rotor. The void formed in at least one of two circumferential sides of each magnet pole includes an extended void region that extends into the peripheral core portion toward a middle point of the magnet pole in the circumferential direction. | 04-19-2012 |
20120091846 | ROTOR CORE - There is provided a rotor core which increases the quality and reliability thereof by preventing the occurrence of a core separation of the rotor core. There is provided a rotor core including a plurality of substantially cylindrical core blocks which are stacked on each other; and a plurality of magnets, characterized in that a plurality of magnet holes extending in an axial direction are provided in the plurality of core blocks so as to extend over the plurality of core blocks in that the plurality of magnets are accommodated in each of the plurality of magnet accommodation holes and fixed therein with a resin, and in that an axial position of core block boundary planes where the plurality of core blocks are brought into abutment with each other and an axial position of magnet boundary planes where the plurality of magnets are brought into abutment with each other differ from each other. | 04-19-2012 |
20120098376 | PERMANENT-MAGNET SYNCHRONOUS MOTOR AND ELECTRIC POWER-ASSISTED STEERING SYSTEM - The present invention relates to a permanent-magnet synchronous motor, particularly an electric three-phase motor, comprising a stator having a stator yoke in which stator teeth with interposed stator grooves are arranged, wherein on each stator tooth at least one winding is provided, further comprising a rotor having permanent magnets, wherein the stator teeth are arranged in layers as disks in the axial direction of the stator and designed at least as two different disks, wherein the stator teeth in a first disk are connected peripherally among each other at the ends thereof pointing toward the rotor in the form of a stator star by a connecting bridge and in a second disk have an interruption instead of the connecting bridge. The present invention further relates to an electric power-assisted steering system. | 04-26-2012 |
20120126651 | ELECTRIC MOTOR - It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M. | 05-24-2012 |
20120133229 | ELECTRIC DEVICE ROTOR AND METHODS FOR MANUFACTURE | 05-31-2012 |
20120153761 | Base assembly for motor and motor including the same - There is provided a base assembly for a motor, including: a base member having a shaft system of the motor mounted therein; a pulling plate bonded to the base member to prevent excessive floating of the motor; and at least one adhesive filling part formed in the pulling plate, and providing an adhesion space for an adhesive used for bonding the pulling plate to the base member to increase a contact area with the adhesive. | 06-21-2012 |
20120175986 | RARE-EARTH MAGNET - In a ferromagnetic material containing at least one kind of rare-earth element, a layer containing at least one kind of alkaline earth element or rare-earth element and fluorine is formed at the grain boundary or near the powder surface of the ferromagnetic material. A further layer containing at least one kind of rare-earth element, having a fluorine concentration lower than that of the layer described first and having a rare-earth element concentration higher than that of the host phase of the ferromagnetic material, or an oxide layer containing a rare-earth element is formed in adjacent with a portion of the layer described first. | 07-12-2012 |
20120181888 | ROTARY ELECTRIC MACHINE ROTOR - A rotary electric machine rotor is provided with a rotor shaft, a rotor core, and a group of permanent magnets. The rotor core includes a group of flux barriers arranged at intervals. At least one of the flux barriers includes at least one bridge joining an inner edge and an outer edge of that flux barriers. The permanent magnets are arranged at the rotor core between the flux barriers as viewed in the cross sectional plane. | 07-19-2012 |
20120194024 | BRUSHLESS DC MOTOR - A brushless DC motor includes a plurality of permanent magnet segments arranged on an outer circumferential surface of a yoke member. Each of the permanent magnet segments includes a thinnest portion positioned in a circumferential center portion of each of the permanent magnet segments, thickest portions positioned in circumferential opposite end portions of each of the permanent magnet segments, and gradually changing portions positioned between the thinnest portion and the thickest portions. The gradually changing portions have a thickness gradually increasing from the thinnest portion toward the thickest portions. A border between the magnetic poles is positioned in the circumferential center portion of each of the permanent magnet segments. | 08-02-2012 |
20120200185 | ROTOR FOR ROTARY ELECTRIC MACHINE AND MANUFACTURING METHOD THEREOF - A rotor for a rotary electric machine includes a plurality of magnetic poles disposed at intervals in a circumferential direction, on an outer periphery of a rotor core that is a steel sheet stack that has a shaft hole in a central portion thereof configured so that a shaft is passed through and fixed to the shaft hole. The magnetic poles each have two permanent magnets and a magnetic flux suppression hole that regulates flow of magnetic flux from the permanent magnets, and are formed in such a manner that a shape of the magnetic flux suppression hole of at least one magnetic pole is different from a shape of the magnetic flux suppression hole of another magnetic poles, depending on the presence or absence of a positioning portion. | 08-09-2012 |
20120200186 | ROTOR FOR ELECTRIC ROTATING MACHINE - An iron rotor core includes a first permanent magnet in an outer peripheral portion of the iron rotor core, second permanent magnets on both circumferential sides of the first permanent magnet and arranged in a generally V-shaped configuration opening radially outward, and a first region provided opposite to the first permanent magnet radially inside the region between the second permanent magnets and having a low magnetic permeability. A q-axis magnetic flux path is formed in an iron core region among the first permanent magnet, the second permanent magnets and the first region, and a central portion thereof is formed between the first permanent magnet and the first region, and entrance/exit portions of the q-axis magnetic flux path formed between the second permanent magnets and second regions provided on both circumferential sides of the first permanent magnet and having a low magnetic permeability with generally the same width. | 08-09-2012 |
20120206006 | ROTOR OF AN ELECTRIC MACHINE - In a rotor of an electric machine, which rotor consists of individual segments which each have a first part which is in contact with a second cooperating part wherein the first part of an individual segment and the second cooperating part of an adjacent individual segment are positively interlocked in the radial and circumferential directions resulting in a self-supporting annular structure of the assembled rotor. The individual sections have openings accommodating permanent magnets which are fixed in the openings by wall sections bent into the openings during assembly of the segments for fixing the permanent magnets in the openings as the individual segments are joined to form a ring. | 08-16-2012 |
20120212095 | ROTOR, ROTATING ELECTRIC MACHINE, VEHICLE, ELEVATOR, FLUID MACHINE, AND PROCESSING MACHINE - A rotor includes first and second permanent magnets provided in each magnetic pole inside a rotor core. The rotor is configured such that when a first end of the first permanent magnet located on the outer circumferential side of the rotor core and the second permanent magnet side is located at a position that faces a first end in the circumferential direction of one of teeth of a stator, a second end of the first permanent magnet located on the axis of rotation side of the rotor core and the second permanent magnet side is located at a position that faces a second end in the circumferential direction of the tooth that faces the first end of the first permanent magnet. | 08-23-2012 |
20120217833 | PERMANENT-MAGNET TYPE ELECTRIC ROTATING MACHINE - According to one embodiment, a permanent-magnet type electric rotating machine has a stator, a magnetizing coil, a rotor and a case. The stator has an armature coil configured to form a magnetic circuit for driving. The magnetizing coil is configured to form a magnetic circuit for magnetizing. The rotor has a constant magnetized magnet, a rotor core and a variable magnetized magnet. The rotor core holds the constant magnetized magnet. The constant magnetized magnet is arranged closer to the magnetic circuit for driving than the variable magnetized magnet. The variable magnetized magnet is arranged closer to the magnetic circuit for magnetizing than the constant magnetized magnet. | 08-30-2012 |
20120235530 | ELECTRIC MACHINES INCLUDING STATOR MODULES - In implementations of the present disclosure, a rotating electric machine includes a rotor assembly supported for rotation about a rotational axis, the rotor assembly including a plurality of rotor poles, the rotor poles being supported for rotation about the rotational axis, and a stator assembly including a plurality of independent stator modules with each stator module including multiple independently energizable stator segments, each stator segment defining a plurality of stator poles of the stator assembly for magnetically interacting with the rotor poles, each stator module being independently removable and replaceable from the stator assembly to adjust the total number of stator poles included in the stator assembly, and/or to vary the maximum power output of the electric machine. | 09-20-2012 |
20120248915 | PERMANENT MAGNET EMBEDDED ROTOR FOR ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE - An accommodating recess ( | 10-04-2012 |
20120267975 | EMBEDDED PERMANENT MAGNET ELECTRIC MOTOR - The embedded permanent magnet electric motor includes: a rotor having: a rotor core that has an outer circumferential surface that is constituted by a plurality of convex surfaces that are circular arc-shaped curved surfaces that are arranged continuously at a uniform angular pitch circumferentially; and a plurality of permanent magnets that are embedded in the rotor core so as to be positioned on a radially inner side of each of the circular arc-shaped curved surfaces; and a stator having: a stator core in which teeth are respectively disposed so as to extend radially inward from an annular core back and are arranged at a uniform angular pitch circumferentially to configure open slots; and a stator coil that is constituted by a plurality of concentrated winding coils that are wound into concentrated windings on each of the teeth. | 10-25-2012 |
20120274165 | ROTOR MAGNET, ROTOR, AND ROTOR MANUFACTURING METHOD - A purpose is to provide a rotor manufacturing method including a magnet assembly formed of divided permanent magnet pieces to enhance insulation and advance cost reduction. The rotor manufacturing method includes forming permanent magnet pieces by dividing a permanent magnet, arranging and resin-molding the permanent magnet pieces to form a magnet assembly, and placing the magnet assembly in a rotor. The method includes placing the permanent magnet pieces all together in a molding die for use in resin-molding, and moving the permanent magnet pieces by a moving device provided in the molding die to move the permanent magnet pieces within the molding die, thereby forming the magnet assembly. | 11-01-2012 |
20120274166 | PERMANENT-MAGNET SYNCHRONOUS MACHINE AND A METHOD FOR MANUFACTURING AND INSTALLING IT - An exemplary permanent-magnet synchronous machine is disclosed with a stator and a rotor located at the distance of the air gap (δ1) from the stator. The rotor is supported on the shaft in a rotating arrangement, and a maximum value has been determined for the eccentricity between the stator and the rotor. The value is higher than one-tenth of the air gap. The magnetization of the synchronous machine is arranged with permanent magnets fitted in the rotor for creating a magnetic flux (φ) which is closed via the stator, the air gap (δ1), and the rotor. A relation H≧(10*ε−δ)*μ | 11-01-2012 |
20120286612 | ELECTRIC MOTOR WITH PERMANENT MAGNETS IN STATOR THEREOF - In an electric motor, each tooth of the stator has a radially extending pillar portion and the number of teeth per magnetic pole is k. When the number k is odd and a center line passing each pole agrees with a center of a circumferential width of one tooth, the pole has first and second corners which are the closest to the stator and positioned before and after the center line in a rotational direction, respectively, and the teeth includes teeth which are the closest to the first and second corners and defined as first and second teeth, respectively. The first and second corners are located according to positional relationships of the first and second teeth and edges of the pillar portions of the first and second teeth in the rotation direction. | 11-15-2012 |
20120306307 | MOTOR - There is provided a motor including: a stationary member including a core having a coil wound therearound and generating rotation force; and a rotating member including a magnet facing the coil so as to be rotatable with respect to the stationary member, wherein the rotating member rotates while descending by thrust dynamic pressure directed downwardly in an axial direction and generated in the rotating member when power is applied to the coil. | 12-06-2012 |
20120306308 | R-Fe-B POROUS MAGNET AND METHOD FOR PRODUCING THE SAME - An R—Fe—B based porous magnet according to the present invention has an aggregate structure of Nd | 12-06-2012 |
20120326546 | Electrical Actuators with Eddy Current Reducer - The invention provides electrical actuators with reducer of Eddy current losses (Eddy current reducer) that improves the performance of actuator. In the electrical actuators, it greatly reduces the Eddy current losses in moving conductive part from stationary permanent magnets (or in stationary conductive part from moving magnets). | 12-27-2012 |
20130020896 | ROTOR FOR A PERMANENT MAGNET ELECTRIC MACHINE - A rotor for a permanent magnet electric machine includes an axis of rotation, an outer surface, and a cross-section orthogonal to the axis of rotation with a non-circular contour of the outer surface defined by a plurality of radii angularly distributed around the axis of rotation. | 01-24-2013 |
20130020897 | ELECTROMAGNETIC STEEL SHEET FORMED BODY, ROTOR CORE, ROTOR, ROTATING ELECTRICAL MACHINE, AND VEHICLE - An electromagnetic steel sheet formed body to be used in a rotor core in which a forward rotational direction and a reverse rotational direction are assigned to a clockwise direction along a circumferential direction around an axial center when viewed from a visual line including the axial center, wherein a first hollow portion, a second hollow portion, and a rib partitioning the first hollow portion and the second hollow portion is formed at the electromagnetic steel sheet formed body such that permanent magnets constituting a plurality of poles are arranged substantially at regular intervals at predetermined pole pitch angles along the circumferential direction, and that the permanent magnet disposed at one pole is arranged in a segmented manner as the first permanent magnet and the second permanent magnet, when viewed from the visual line, and wherein the first hollow portion when viewed from the visual line is located closer to a side of the forward rotational direction than a centerline passing through a center angle of the pole pitch angle, and is arranged such that a longitudinal axis of the first hollow portion obliquely intersects in the clockwise direction with respect to a line perpendicular to the centerline. | 01-24-2013 |
20130038160 | SEQUENTIALLY LAMINATED, RARE EARTH, PERMANENT MAGNETS WITH SULFIDE-BASED DIELECTRIC LAYERS AND REINFORCED BY DIFFUSION REACTION LAYERS - Laminated, mechanically strong, rare earth, permanent magnets with dielectric layers having increased electrical resistivity and improved mechanical strength suitable for use in high performance, rotating machines comprising sequential laminates of permanent magnet layers and transition and/or diffusion reaction layers; wherein the transition and/or diffusion reaction layers surround sulfide-based dielectric layers, thereby avoiding direct contact between the dielectric layers with permanent magnet layers. | 02-14-2013 |
20130038161 | PERMANENT MAGNET ROTOR - A permanent magnet rotor for a motor, the permanent magnet rotor including an iron core and a permanent magnet. The iron core includes an annular ring having a central axial bore and a plurality of magnetic induction blocks protruding outwards from an outer side of the annular ring. Between two adjacent magnetic induction blocks form a radial recess for mounting the permanent magnets. The magnetic induction blocks at both sides of an opening of the radial recess protrude with a hook block. The section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle. The permanent magnet rotor has a simple structure, low magnetic leakage and torque ripple, big counter-electromotive force constant, and smooth waveform of counter-electromotive force. | 02-14-2013 |
20130043753 | Rotor Core of Motor - Provided is a rotor core of a motor, the rotor core, the rotor core including a thin disk-shaped rotor core member, a shaft hole penetratively formed at a center of the rotor core member, a shaft press-fitted into the shaft hole, a plurality of magnet insertion holes penetratively formed at a position near to a periphery of the rotor core member for inserted coupling by a magnet, and a magnet fixing unit formed by stacking the rotor core members each at a predetermined height, and press-fitting the shaft into the shaft hole, wherein the rotor core members are stacked at a predetermined height, and the shaft is inserted into the shaft hole. | 02-21-2013 |
20130076185 | Electromechanical Limited Rotation Rotary Actuator - An electromechanical limited rotation rotary actuator comprises a stator having an aperture extending axially therein and at least two teeth having arcuate end portions forming an aperture. A rotor includes a diametral magnetized magnet bidirectionally operable with the stator and extending into the aperture. A non-uniform gap is formed between the magnet and the end portions of the teeth, and wherein the shape of the gap provides a restoration torque resulting in a spring-like return-to-center action of the rotor. An electrical coil extends around at least a portion of one tooth and is excitable for magnetizing the tooth and providing bidirectional torque to the rotor. | 03-28-2013 |
20130082560 | CORELESS ELECTROMECHANICAL DEVICE, MOBILE UNIT, ROBOT, AND MANUFACTURING METHOD OF CORELESS ELECTROMECHANICAL DEVICE - A coreless electromechanical device includes permanent magnets provided in a first member, M (M is an integer number equal to or more than two) phases of α-wound air core electromagnetic coils provided in a second member, and a coil back yoke provided in the second member, wherein the electromagnetic coil has two effective coil regions that generate force for relative rotational transfer of the first member with respect to the second member and two coil end regions, and the coil end regions of at least the (M-1) phases of electromagnetic coils of the M phases of electromagnetic coils are bent toward an inner circumference side or an outer circumference side of a cylindrical surface containing the cylindrical region so as not to interfere with the coil end regions of the other phases of electromagnetic coils. | 04-04-2013 |
20130106223 | METHOD AND APPARATUS FOR ACTIVATING AN ELECTRIC MACHINE, AND ELECTRIC MACHINE | 05-02-2013 |
20130119805 | MOTOR AND COMPRESSOR - A motor having improved heat resistance is provided. The motor includes a rotor comprising a rotor core, two or more slots arranged in a circumferential direction of the rotor in the rotor core, two magnets in a plate shape having a thickness in a radial direction of the rotor, and divided and arranged in the circumferential direction in each of the two or more slots, and a spacer for dividing the two magnets; and a stator disposed outside of the rotor in the radial direction with a clearance from the rotor and comprising a stator core having two or more slots wound with one or more winding wires; and the two magnets are separated from each other by the spacer, by a distance which is 10% to 50% of a circumferential length of the slot having the two magnets. | 05-16-2013 |
20130119806 | MOTOR AND ELECTRICAL APPLIANCE PROVIDED WITH SAME - An electric motor includes a stator that has a stator winding wound on a stator iron core; a rotor having a rotating body with a rotating shaft in the center; a bearing for journaling the rotating shaft; and two conductive brackets for fixing the bearing. The rotating body holds a magnet such that the magnet faces the stator, and is fastened to the rotating shaft penetrating through the center of the rotating body. In the rotating body, a dielectric layer is formed between the rotating shaft and the outer circumference of the rotating body. The dielectric layer has a polygonal shape with the rotating shaft in the center. An electric device includes the thus configured electric motor. | 05-16-2013 |
20130127280 | ELECTRIC ROTATING MACHINE AND ELECTRIC VEHICLE USING THE SAME - An electric rotating machine that can improve efficiency in the high-speed operation state thereof and improve the efficiency of an electric vehicle in the high-speed operation state thereof by the use of the electric rotating machine. An electric rotating machine includes a stator and a rotor. The stator has a stator core with slots and stator windings. The rotor includes a rotor core and a plurality of first permanent magnets and of second permanent magnets. The rotor core is provided with laminated electromagnetic steel sheets and formed with a plurality of magnetic poles arranged in a circumferential direction. The plurality of first and second permanent magnets form the plurality of corresponding magnetic poles. The first permanent magnet and the second permanent magnet for forming each of the magnetic poles of the rotor are different from each other in recoil permeability. | 05-23-2013 |
20130140932 | ROTOR CORE FOR AN ELECTRIC MACHINE - A rotor core is provided for an electric machine. The rotor core includes a body extending a length along, and being configured to rotate about, a central longitudinal axis. The body includes spokes arranged radially about the central longitudinal axis and conductor openings arranged radially about the central longitudinal axis. The radial arrangement of the spokes and conductor openings about the central longitudinal axis includes an alternating pattern of spokes and conductor openings. The spokes include slots extending therethrough along the central longitudinal axis. The slots are positioned radially about the central longitudinal axis between adjacent conductor openings. The rotor core also includes conductors extending within the conductor openings of the body. | 06-06-2013 |
20130147299 | INTERIOR PERMANENT MAGNET MACHINE WITH POLE-TO-POLE ASYMMETRY OF ROTOR SLOT PLACEMENT - An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first barrier is defined by the first, second, third and fourth slots. The slots are configured to be symmetric relative to their respective pole axes. A first angle is defined between the first and second slots. A second angle is defined between the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is minimized. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor. | 06-13-2013 |
20130162088 | ELECTRIC ROTATING MACHINE - An electric rotating machine is provided. A tooth portion of a stator is divided into a first tooth portion and a second tooth portion that are movable relative to each other between a first position, in which a magnetic resistance between the first and second tooth portions is small, and a second position, in which the magnetic resistance is relatively large. In a state in which the second tooth portion is in the second position, a region from a stator yoke portion side end of a current-carrying winding disposed around the tooth portion to a rotor side end of a winding arrangeable region is divided into a first region and a second region. A current-carrying winding space factor in the first region is set to be relatively smaller than in the second region. | 06-27-2013 |
20130162089 | Sintered Magnet Motor - A sintered magnet motor includes a rotor, a stator, and coils. Sintered magnets are disposed on the rotor. In the sintered magnet motor, a residual magnetic flux density of each of the sintered magnets is controlled by a magnetic field generated by a coil current. | 06-27-2013 |
20130169094 | Rotor Lamination Structure For Permanent Magnet Machine - A rotor structure is provided to block direct axis flux from a stator armature without reducing the main magnetizing flux from permanent magnet inside the rotor. For example, a rotor may be provided including a magnet and a non-magnetic region located radially between the magnet and an edge of the rotor. | 07-04-2013 |
20130169095 | SYNCHRONOUS ROTARY ELECTRIC MACHINE HAVING A DOUBLE EXCITATION ROTOR - A machine ( | 07-04-2013 |
20130187504 | DYNAMO-ELECTRIC MACHINE - A dynamo-electric machine includes: a stator ( | 07-25-2013 |
20130200739 | MOTOR - A motor realizes mechanical field-weakening control by controlling the leakage magnetic flux from the rotor cores of the motor. The motor includes a stator, a rotor including rotor cores circumferentially spaced apart from one another inside the stator and permanent magnets disposed between the respective rotor cores which extend radially from the stator, and a magnetic flux adjustment unit including a ring-shaped main frame, magnetic substance portions extending from the main frame so as to be circumferentially spaced apart from one another and non-magnetic regions defined between the magnetic substance portions. The magnetic flux adjustment unit is rotatable to control the leakage magnetic flux from the rotor cores. | 08-08-2013 |
20130207498 | SYNCHRONOUS MOTOR - A double-stator synchronous motor has a rotor, an inner stator and an outer stator. The rotor has segment-magnetic poles arranged in a ring shape. Magnetic poles formed in the inner stator and the outer stator face to each other in a same circumferential position. Each stator has q (q≧2) slots per pole and phase to disperse magnetomodive force. A radially minimum width Wr of each segment magnetic pole is within a range of 1.3 | 08-15-2013 |
20130249340 | PERMANENT-MAGNET-EXCITED ELECTRIC MOTOR WITH HEATING DEVICE, AND OPERATING METHOD - The aim of the invention is to provide an electric motor which has a high torque at low rotation speeds and a high power at high rotation speeds. The invention therefore proposes an electric motor with permanent-magnet excitation having a first active part ( | 09-26-2013 |
20130270952 | AXIALLY ASYMMETRIC PERMANENT MAGNET MACHINE - A permanent magnet machine is provided with a rotor positioned at least partially within a stator. The rotor includes first and second ring segments oriented axially around a central axis. The rotor defines first and second configurations in the first and second ring segments, respectively. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. A first layer of slots, defining a slot outer edge, may be formed in the rotor. In one embodiment, a stator-to-slot gap varies between the first and second ring segments. In another embodiment, a stator-rotor gap varies between the first and second ring segments. In another embodiment, a bridge thickness varies between the first and second ring segments. Thus the rotor exhibits axial asymmetry. | 10-17-2013 |
20130278104 | Rare Earth Magnet and Motor Using the Same - The present invention makes it possible to increase the residual magnetic flux density and the coercive force of a rare earth magnet; and raise the Curie temperature. In a magnet formed by compressing magnetic particles, the surface of a magnetic particle is covered with a metal fluoride film, the magnetic particle has a crystal structure containing a homo portion formed by bonding adjacent iron atoms and a hetero portion formed by bonding two iron atoms via an atom other than iron, and the distance between the two iron atoms in the hetero portion is different from the distance between the adjacent iron atoms in the homo portion. | 10-24-2013 |
20130300241 | COMPOSITE STATOR FOR ELECTROMECHANICAL POWER CONVERSION - A rotating electromechanical apparatus includes a cylindrical ironless stator coil comprising a plurality of wires, a magnetic rotor arranged with the stator coil, wherein the magnetic field flux associated with the rotor interacts with the stator coil wires by electromagnetic induction, a cylindrical bobbin arranged to support the wires, a strand woven on at least the outer circumference of the wire-wrapped cylindrical bobbin, and a curable potting material potting the wires, bobbin and strand to provide an ironless composite stator coil when cured. | 11-14-2013 |
20130307363 | ROTOR FOR ELECTRIC MACHINE | 11-21-2013 |
20140001906 | BRUSHLESS MOTOR AND ELECTRIC DEVICE MOUNTED WITH SAME | 01-02-2014 |
20140001907 | HIGH-EFFICIENCY POWER GENERATOR | 01-02-2014 |
20140009023 | PERMANENT MAGNET MOTOR - A permanent magnet motor ( | 01-09-2014 |
20140015363 | MOTOR AND ELECTRIC APPARATUS EQUIPPED WITH SAME - A motor of the invention has a rotary body of a rotor, and the rotary body includes an outer core constituting an outer portion of the rotary body, an inner core constituting an inner portion connected to a shaft, and a dielectric layer disposed between the outer core and the inner core. The outer core has a protruding portion that protrudes inward from an inner surface thereof, and the inner core has a protruding portion that protrudes outward from an outer surface thereof, wherein the outer core and the inner core are so disposed that an end face of the protruding portion of the outer core and an end face of the protruding portion of the inner core confront partially with respect to each other. | 01-16-2014 |
20140035416 | ELECTRIC MOTOR - An electric motor includes a stator, a rotor and a can arranged between the stator and the rotor, wherein the stator exhibits several stator pole pairs, which are each formed by two adjacent stator poles, which are designed in such a way as to generate oppositely polarized magnetic fields, and wherein the rotor exhibits a plurality of magnetic rotor poles distributed over the circumference, and is configured in such a way as to enable a magnetic flux between two adjacent rotor poles, as well as a pumping set with such an electric motor. | 02-06-2014 |
20140042853 | ELECTRIC ROTATING MACHINE - A magnetic resistance changing mechanism for changing a magnetic resistance of a stator magnetic path including a stator yoke portion and each tooth portion by mechanically changing the stator magnetic path is provided. A pair of side protruded portions are formed on circumferential sides of a rotor side end portion of each tooth portion. The rotor side end face of each tooth portion is shaped so that a gap between the rotor side end face of each tooth portion and an outer periphery of the rotor is increased continuously or stepwisely from a circumferential intermediate portion of the rotor facing end face toward circumferential end portions thereof. | 02-13-2014 |
20140049129 | ROTOR FOR INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR AND INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR INCLUDING THE SAME - Disclosed herein is a rotor for an interior permanent magnet synchronous motor, the rotor including: a rotor core having a through-hole formed in an axial direction so that a shaft is press-fitted thereinto, a permanent magnet receiving part formed at an outer peripheral portion thereof in a circumferential direction so that a permanent magnet is inserted thereinto, and slits formed to be adjacent to the permanent magnet receiving part and be extended toward a circumferential end in a radial direction; and at least one permanent magnet inserted into the permanent magnet receiving part. | 02-20-2014 |
20140054997 | PERMANENT MAGNET TYPE MOTOR AND METHOD FOR MANUFACTURING PERMANENT MAGNET TYPE MOTOR - Provided is a permanent magnet type motor capable of improving a demagnetization proof stress almost without lowering a generated torque, and reducing a torque ripple and a cogging torque by improving a gap magnetic flux density distribution. | 02-27-2014 |
20140070653 | MOTOR - A motor having a structure that enhances durability of the motor. The motor includes a stator and a rotor rotatably disposed at an inside outside of the stator. The rotor includes a plurality of rotor cores radially disposed and a plurality of magnets respectively disposed between rotor cores. The area of a lateral surface of each of the magnets adjoining a lateral surface of a corresponding one of the rotor cores is greater than the area of an imaginary plane connecting one end of an upper end portion of each of the magnets to one end of a lower end portion of each of the magnets. | 03-13-2014 |
20140084728 | ROTATING ELECTRICAL MACHINE AND ELECTRIC POWER STEERING SYSTEM USING THE SAME - A concentrated winding motor having the combination of the number of poles and the number of slots of 10:12 or 14:12 includes coils in the same phase that are adjacent to each other and have mutually different numbers of coil turns. | 03-27-2014 |
20140084729 | ELECTRIC ROTATING MACHINE - The electric rotating machine includes a stator having an inner hole, a rotor disposed in the inner hole of the stator with a gap with an inner periphery of the stator and formed with magnet housing holes each housing a permanent magnet as a magnetic pole embedded in the outer periphery of the rotor, and a shaft pressure-inserted into a center hole of the rotor. The rotor includes, for each adjacent two of the magnet housing holes, a beam portion formed radially outside the magnet housing holes, a projecting portion projecting radially inward to define the center hole, an extension portion formed radially outside the projecting portion and radially outside the magnet holes, and a plate-shaped bridge portion connecting the beam portion and the extension portion. | 03-27-2014 |
20140084730 | METHODS FOR MANUFACTURING ROTORS FOR ELECTRIC MOTORS AND ROTORS MANUFACTURED USING SAID METHODS - A method for manufacturing a rotor with permanent magnets may include providing a central core with a desired cross-section; providing a plurality of ferromagnetic discs having a hole shaped in a complementary manner to the cross-section of the central core; stacking up the ferromagnetic discs around the central core to form a cylindrical structure with a longitudinal cavity, wherein the longitudinal cavity is formed by the holes of the stacked-up ferromagnetic discs; integrally blocking together the stacked-up ferromagnetic discs; and removing the central core. A rotor may be manufactured by the method. The rotor may be used in an electric motor. | 03-27-2014 |
20140117802 | ROTOR HAVING PROJECTIONS FOR POSITIONING PERMANENT MAGNETS AND ELECTRIC MOTOR INCLUDING SUCH ROTOR - A rotor includes a rotor core having an outer circumferential surface provided with projections extending in a direction of a rotational axis and projecting outwardly in a radial direction, and a plurality of permanent magnets arranged between the projections. The projections extend at an angle with respect to the direction of a rotational axis. The permanent magnets have inclined sides on both side faces, which incline with respect to the direction of a rotational axis. Side faces of the projections and the inclined side of the permanent magnets which face each other incline so as to define the same angle with respect to the direction of a rotational axis. An electric motor including such a rotor is also provided. | 05-01-2014 |
20140117803 | MAGNETICALLY LOADED COMPOSITE ROTORS AND TAPES USED IN THE PRODUCTION THEREOF - A method of making a magnetically loaded pre-impregnated tape uses a drum | 05-01-2014 |
20140125180 | ELECTRIC MOTOR - The invention relates to an electric motor having a rotatably mounted rotor magnet and a stator enclosing the rotor magnet, said stator comprising at least three coil windings and a winding carrier, wherein coil axes of the at least three coil windings are disposed radially to an axis of rotation of the rotor magnet in various radial directions. The coil windings of the electric motor are designed so that a gap that is parallel to the axis of rotation of the rotor magnet extends between at least two adjacent coil windings, in which at least one media line extending in the longitudinal direction is provided. | 05-08-2014 |
20140139063 | PERMANENT MAGNET, AND MOTOR AND POWER GENERATOR USING THE SAME - In one embodiment, a permanent magnet includes a sintered compact including: a composition expressed by a composition formula: R | 05-22-2014 |
20140139064 | PERMANENT MAGNET, AND MOTOR AND POWER GENERATOR USING THE SAME - In one embodiment, a permanent magnet includes: a composition expressed by R | 05-22-2014 |
20140152135 | MOTOR WITH VARIABLE MAGNET FLUX - Disclosed therein is a motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor. The rotor includes a rotor housing, a plurality of unit rotor cores and magnets which are attached to the inner wall surface of the rotor housing, and the unit rotor cores and the magnets are arranged in turn. The stator includes a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof. | 06-05-2014 |
20140159528 | ROTOR PERMANENT MAGNET APPARATUS FOR DRIVE MOTOR BASED ON TEMPERATURE DISTRIBUTION - Disclosed herein is a rotor permanent magnet apparatus for a drive motor based on temperature distribution. The permanent magnet may enhance coercivity without a substantial decrease in magnetic flux density Br by applying a grain boundary diffusion process of diffusing dysprosium on the surface of the permanent magnet based on the temperature distribution of the permanent magnet | 06-12-2014 |
20140159529 | SWITCHED RELUCTANCE MACHINE WITH ROTOR EXCITATION USING PERMANENT MAGNETS - Various embodiments are described herein for a switched reluctance machine having a rotor excitation. In one example embodiment, the switched reluctance machine comprises a stator and a rotor. The rotor may be disposed inside or outside the stator. The rotor is spaced from the stator, and the rotor and the stator are concentrically disposed. The rotor has a plurality of rotor poles having an excitation source, where the excitation source comprises at least one adjustable parameter. The excitation source is provided by a permanent magnet. The dimensions and various other parameters associated with the permanent magnets are adjustable. | 06-12-2014 |
20140167547 | ELECTRIC MACHINE WITH FRACTIONAL SLOT WINDINGS - An electric machine includes a stator core defining a number of stator slots (Z). A rotor assembly is positioned at least partially within the stator core. The rotor assembly includes at least one permanent magnet and defines a number of poles (M). A plurality of stator windings are positioned in the number of stator slots and define a number of phases (M). The machine defines a non-integer slots per pole per phase value (X), which is expressed as a mixed fraction in the form of A.(B/C), where A, B and C are integers. Optimal configurations for the electric machine are specified that maximize torque while minimizing torque ripple, noise and manufacturing complexity. In one embodiment, the slots per pole per phase value (X) is 2½. In another embodiment, the slots per pole per phase value (X) is 3½. | 06-19-2014 |
20140167548 | MOTOR - A rotor of a motor includes a first rotor that includes a first rotor core and a plurality of first magnets that are coupled to an outer circumferential surface of the first rotor core, a second rotor that includes a second rotor core and a plurality of second magnets that are coupled to an outer circumferential surface of the second rotor core, and a third rotor that is stacked between the first rotor and the second rotor and includes a third rotor core and a plurality of third magnets that are coupled to an outer circumferential surface of the third rotor core, wherein magnetic fluxes of the plurality of third magnets are less than magnetic fluxes of the plurality of first magnets or second magnets. | 06-19-2014 |
20140184005 | ROTOR FOR DRIVE MOTOR - A rotor is provided that includes a rotor core formed in a cylindrical shape so as to be disposed and rotatable in a hollow portion of a hollow cylinder of a stator and a rotating shaft that penetrates a rotational center of the rotor core and rotates together with the rotor core accordingly. Furthermore, permanent magnets are disposed along a circumference of the rotor core and are each divided into a plurality of individual units along an axial direction of the rotor core. In particular, the plurality of individual units includes an intermediate permanent magnet positioned at a center portion in the axial direction. This intermediate permanent magnet is made of a material having coercive force higher than that of the other individual units. | 07-03-2014 |
20140203680 | Easy-to-Start Motor and a Base Thereof - An easy-to-start motor includes a base, a stator and a rotor. The base has a plastic member and a metallic induction member wrapped with the plastic member. The metallic induction member includes at least one magnetic attraction portion. Each magnetic attraction portion is in the form of a protrusion. The stator is coupled with the base. The rotor has a shaft and a permanent magnet. The shaft is capable of being coupled with the base. The at least one magnetic attraction portion is magnetically attracted by the permanent magnet, so as to prevent the rotor from stopping at a dead location where it is difficult to start the motor. A base of the easy-to-start motor is also disclosed and adapted to be coupled with a rotor, including a plastic member and a metallic induction member wrapped with the plastic member. | 07-24-2014 |
20140210292 | CONTOURED-FIELD MAGNETS - Apparatus and methods for manufacturing magnets, and magnets, having magnetically oriented grains, and apparatus including such magnets. The field of a permanent magnet may be shaped by applying an external field to the material from which the magnet is made in such a way as to magnetize different regions of the material in different directions. The apparatus may include, and the methods may involve, a metal-powder press that may press metal powder in the presence of a magnetic field. The press may compress the powder in an axial direction. The field may have flux lines that are transverse to the axial direction. The field may have flux lines that are along the axial direction. | 07-31-2014 |
20140210293 | PERMANENT MAGNET EMBEDDED TYPE ROTOR FOR ROTATING ELECTRICAL MACHINE AND ROTATING ELECTRICAL MACHINE HAVING PERMANENT MAGNET EMBEDDED TYPE ROTOR - A permanent magnet embedded type rotating electrical machine includes a rotor includes a rotor core formed by a plurality of laminated magnetic steel plates and a plurality of permanent magnets and a stator. Each magnetic steel plate has a plurality of pairs of magnet holes, pairs of joining portions and peninsula portions. The magnet holes of each pair are disposed at positions adjacent to an outer periphery of the magnetic steel plate so as to form a V-shape that is divergent toward the outer periphery. The joining portion is configured to connect the magnet hole with a circumference of the peninsula portion. A distance between a center of the rotor core and at least one of a pair of ends of the circumference of the peninsula portion is smaller than a distance between the center and an intersection of a d-axis of the rotor and the circumference. | 07-31-2014 |
20140217846 | Electric Motor Having an Iron-Free Winding - An electric motor ( | 08-07-2014 |
20140246938 | PERMANENT MAGNET ELECTRICAL MACHINE - A 2-pole machine arrangement ( | 09-04-2014 |
20140265697 | DIRECT-CURRENT ELECTRIC MOTOR - For applications standard d-c machines require gear-boxes, there is designed a d-c motor provided with a first basic element ( | 09-18-2014 |
20140292132 | PERMANENT MAGNET ROTOR HAVING A COMBINED LAMINATED STACK AND METHOD OF ASSEMBLY - A rotor for an electromagnetic apparatus including: ferromagnetic laminates stacked along a longitudinal axis of the rotor; non-magnetic laminates stacked along the longitudinal axis, wherein the non-magnetic laminates are between the ferromagnetic annular laminates; cavities in the rotor formed by aligned slots in the ferromagnetic and non-magnetic laminates, wherein the cavities are parallel to the axis of the rotor, and a permanent magnet(s) in each of the aligned cavities. The laminates may each be an annular disc or may be segments arranged in an annular array around a shaft of the rotor. | 10-02-2014 |
20140292133 | MOTOR - A flux barrier includes a radially outer proximate part and a radially inner proximate part that are a rotor radially outer side surface and a rotor radially inner side surface extending from a communicating part, at least one of the radially outer proximate part and the radially inner proximate part is connected to an end part of a magnet fixing part of a magnet hole in an inward direction of the magnet hole, and a projecting part projecting in an inward direction of the flux barrier is provided on at least one of the radially outer proximate part and the radially inner proximate part connected to the magnet fixing part. A constricted part in which a width of the flux barrier is narrower than on a side closer to the communicating part than the projecting part is formed by the projecting part. | 10-02-2014 |
20140300232 | HIGH ACCELERATION ROTARY ACTUATOR - A rotary actuator having a tandem rotor, a first magnetic element, a second magnetic element and a tandem stator is disclosed. | 10-09-2014 |
20140346910 | PERMANENT MAGNET TYPE CONCENTRATED WINDING MOTOR - In a permanent magnet type concentrated winding motor, the number of magnetic poles is M, a stator Sr has an N number of teeth T around which coils are concentratedly wound and which are circumferentially arranged at equal intervals, M is equal to (18±4)n and N is equal to 18n, an armature winding AW has an m number of parallel circuits, and a 1-phase circuit of the parallel circuits is configured to have a 6n/m number of coils connected in series with each other. | 11-27-2014 |
20140354100 | RARE EARTH MAGNET, ROTOR AND MANUFACTURING METHOD FOR RARE EARTH MAGNET - A rare earth magnet may include a formed body having magnetic powder containing rare earth metal, the formed body being magnetized, a coating film which is formed on an outer face of the formed body, and a rust preventive treatment layer which is formed on a surface of the magnetic powder in a pore of the formed body. In a manufacturing method for a rare earth magnet, a forming step is performed in which a formed body having magnetic powder containing rare earth metal is formed, after that, a coating film forming step is performed in which a coating film is formed on an outer face of the formed body and, after that, a rust prevention processing step is performed in which rust preventive liquid is impregnated into the formed body. | 12-04-2014 |
20140375161 | STATOR UNIT AND MOTOR - A stator unit including a coil in which a distance between an m−1-th turn and an m-th turn is wider than each distance in a first turn to the m−1-th turn. The m+1-th turn is disposed between the m−1-th turn and the m-th turn. Further, in a cross-section perpendicular to a central axis and passing a tooth, an angle between a line segment connecting respective centers of the m+1-th turn and the m−1-th turn and a line segment connecting respective centers of the m+1-th turn and the m-th turn is about 120° or more. With this structure, bulging in a circumferential direction of the coil adjacent to an inner peripheral portion of the tooth can be suppressed and a clearance can be secured between adjacent coils such that the number of turns of the coil can be increased. | 12-25-2014 |
20150022041 | METHOD OF COOLING A GENERATOR OR MOTOR ROTOR WITH END DISKS AND A HYBRID SHAFT ASSEMBLY - A shaft assembly includes a shaft with magnets surrounding the shaft, and thermal conducting disks coupled to the shaft, and coupled to two ends of the magnets. | 01-22-2015 |
20150028707 | Interior Permanent Magnet Motor - An interior permanent magnet motor includes a stator having teeth on which a coil is wound, a rotor rotatably provided inside the stator, the rotor including a plurality of rotor sectors, and at least two permanent magnet recesses formed between the rotor sectors. Ferrite permanent magnets are embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor. Rare-earth permanent magnets are embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor. | 01-29-2015 |
20150035402 | SPOKE PERMANENT MAGNET MACHINE WITH REDUCED TORQUE RIPPLE AND METHOD OF MANUFACTURING THEREOF - An internal permanent magnet machine includes a rotor assembly having a shaft comprising a plurality of protrusions extending radially outward from a main shaft body and being formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions therein, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed therein to receive a respective shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a respective lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group. | 02-05-2015 |
20150042194 | SINGLE-PHASE BRUSHLESS MOTOR - A single-phase brushless motor includes a stator and a rotor rotatable with respect to the stator. The rotor includes a number of permanent magnetic poles. The stator includes a stator core and a winding wound on the stator core. The stator core includes an outer annular portion, an inner annular portion, and connecting portions connecting the inner and outer annular portions. The winding is wound around the connecting portions. The rotor is received in the inner annular portion. The inner annular portion and the rotor form a substantially uniform air gap. A recess is formed in an inner surface of a part of the inner annular portion between each pair of adjacent connecting portions. A center of each recess deviates from a center line of symmetry of the corresponding pair of connecting portions. | 02-12-2015 |
20150048704 | DOUBLE STATOR PERMANENT MAGNET MACHINE - A double stator permanent magnet machine includes an inner stator having a back iron and a set of inner stator poles connected to the back iron, a rotor having a shaft and a set of segments, each segment having a permanent magnet, adjacent the inner stator and rotatively coupled to the inner stator, an outer stator having a set outer stator poles, adjacent the rotor and rotatively coupled to the rotor, a set of inner windings disposed between each of the inner stator poles, and a set of outer windings disposed between each of the outer stator poles. | 02-19-2015 |
20150061441 | ELECTRIC MACHINE AND ASSOCIATED METHOD - An electric machine includes a machine housing and a stator disposed at least partially within the housing. The electric machine also includes a radially embedded permanent magnet rotor disposed at least partially within the housing and an endcap. The rotor has at least one radially embedded permanent magnet that is configured to provide increased flux to reduce motor efficiency loss. The endcap is operably connected to a distal portion of the rotor. | 03-05-2015 |
20150084465 | ROTARY ELECTRIC MACHINE, ELECTRIC MOTOR, MACHINE, ELECTRIC GENERATOR, AND ELECTRIC GENERATING MACHINE - According to one embodiment, a rotary electric machine includes a rotor that is rotatable at a predetermined position and includes a plurality of first magnetic members arranged along an outer circumferential surface, the first magnetic members each including a first magnetic pole and a second magnetic pole. The rotary electric machine includes a first supporting member that surrounds a periphery of the rotor. The rotary electric machine includes a plurality of second supporting members that are fixed to an inner circumferential surface of the first supporting member. The rotary electric machine includes a plurality of second magnetic members that are fixed on side surfaces of the second supporting members and that have a third magnetic pole facing the first magnetic pole with an air gap and a fourth magnetic pole facing the second magnetic pole with an air gap. | 03-26-2015 |
20150097458 | Permanent Magnet Electric Machine - A rotor for a permanent magnet electric machine includes a rotor core and a plurality of permanent magnet bundles located at the rotor core. Each permanent magnet bundle includes a first magnet of a first magnetic material and a second magnet of a second magnetic material located radially outboard of the first magnet. The second magnet has an increased resistance to demagnetization relative to the first magnet. A permanent magnet electric machine includes a stator and a rotor magnetically interactive with the stator. The rotor includes a rotor core and a plurality of permanent magnet bundles located at the rotor core. Each permanent magnet bundle includes a first magnet of a first magnetic material and a second magnet of a second magnetic material located radially outboard of the first magnet. The second magnet has an increased resistance to de-magnetization relative to the first magnet. | 04-09-2015 |
20150137645 | SPINDLE MOTOR - A spindle motor may include: a sleeve rotatably supporting a shaft; a rotor coupled to the shaft and rotating together therewith; and a base member fixedly coupled to the sleeve, wherein the base member includes a plurality of penetration holes formed therein so as to penetrate therethrough, and a magnetic material is inserted into at least one of the plurality of penetration holes, and non-magnetic materials are inserted into the remaining penetration holes. | 05-21-2015 |
20150145365 | ROTARY ELECTRIC MACHINE - A rotor core formed with a shaft hole at the center thereof is provided. A cylindrical member fitted into the shaft hole of the rotor core along an outer peripheral surface of the cylindrical member is provided. A drive shaft inserted into a hollowed part of the cylindrical member (collar) is provided. The collar is made of the material having a lower Young's modulus than those of the rotor core and the drive shaft, and is formed such that an inner peripheral surface of the collar is a tapered surface. The drive shaft has, at an outer periphery thereof, a tapered surface such that the tapered surface is in surface contact with the tapered surface of the collar in fitting of the drive shaft into the collar. | 05-28-2015 |
20150294787 | METHOD FOR PRODUCING A PERMANENT MAGNET AND PERMANENT MAGNET - A method for producing a permanent magnet, comprising the steps: (a) providing a powder of a magnetic material, (b) coating the powder particles with a coating of a diamagnetic or paramagnetic coating material, (c) compressing the coated particles to form a pressed part, (d) heat treatment to sinter the coating material at a temperature less than a temperature suitable for sintering the magnetic material, while the coating material transfers to a matrix of a diamagnetic or paramagnetic material, which embeds the particles of the magnetic material, and (e) magnetizing the magnetizable material in an external magnetic field, wherein the steps (c), (d) and (e) are carried out in any order successively or at the same time in any desired combination. The nanostructured permanent magnet that can be produced by means of said method comprises cores of a permanently magnetic material having a mean particle diameter of no more than 1 μm and a matrix of a diamagnetic or paramagnetic material in which the cores are embedded. | 10-15-2015 |
20150295456 | ELECTRIC MACHINE AND METHOD OF OPERATION THEREOF - In one aspect of the invention for which protection is sought there is provided an electric machine comprising a substantially circular rotor and a stator, wherein the stator comprises at least one substantially arcuate segment. Aspects of the invention also relate to a stator segment comprising at least one inter-pole shield disposed between adjacent teeth. Further aspects of the invention also relate to a stator segment having a first shield disposed at a first circumferential end thereof and/or a second shield disposed at a second circumferential end thereof. Aspects of the invention also relate to a stator segment having a radially outwardly directed protuberance. | 10-15-2015 |
20150326078 | MOTOR ROTOR SUPPORT AND METHOD FOR MANUFACTURING SAME - An object of the present invention is to provide a motor rotor support suitable for an axial gap motor and a method for manufacturing the same. The motor rotor support for supporting a magnetic body disposed on a rotor of a motor is configured by a nonmagnetic steel having a relative permeability of less than 1.005 and a 0.2% yield strength at room temperature of 550 MPa or more. | 11-12-2015 |
20150364958 | Magnetic Drive Device - Magnetic drive device characterised in that it comprises a driving element moving in a guide element, and suitable to drive a driven element; the driven element is mobile along the guide element, in accordance with the movement of the driving element; the driving element acting on the driven element by use of magnetic means and without direct physical contact. The magnetic drive action of the driving element is induced by means of the use of permanent magnets or of electromagnets which act on the driven element. | 12-17-2015 |
20150372547 | ROTOR AND ROTARY ELECTRIC MACHINE - Each of permanent magnets includes a magnet body formed across the radial direction of a rotor core, and a pair of magnet end parts bending toward the outer peripheral side of the magnet body and extending respectively from both ends of the magnet body in the peripheral direction toward the outer edge of the rotor core. Magnetization directions of the magnet end parts and a magnetic pole center line intersect with each other on the outer peripheral side of the magnet body. The inclination angle of each magnetization direction of the magnet end parts with respect to the magnetic pole center line is greater than the inclination angle of a magnetization direction of the magnet body with respect to the magnetic pole center line. | 12-24-2015 |
20150372548 | INTERIOR PERMANENT MAGNET MOTOR, COMPRESSOR AND REFRIGERATION AND AIR CONDITIONING APPARATUS - A rotor outer peripheral surface includes first arcs and second arcs. The first arc is positioned in a magnetic pole center portion. The second arc is positioned in an inter-pole portion. The first arc bulges toward a radially outer side to a higher degree than the second arc. An air gap is varied in a manner of being increased as approaching from each of the magnetic pole center portions to the adjacent inter-pole portions. A hole defining portion of a magnet insertion hole on the radially outer side has a curvature of a third arc, and a hole defining portion of the magnet insertion hole on a radially inner side has a curvature of a fourth arc. An opening angle of a tooth tip portion, an opening angle of the first arc, and an opening angle of the third arc coincide with each other. | 12-24-2015 |
20150372579 | PERMANENT MAGNET MOTOR HAVING REDUCED TORQUE RIPPLE - A permanent magnet motor, including: a stator assembly and a rotor assembly. The stator assembly includes: a stator core and a coil winding. The stator core includes: a yoke portion, a plurality of tooth portions, and a plurality of winding slots. The rotor assembly includes: a rotor core, a plurality of permanent magnets, and a rotor sheath. The tooth portions are extended out of the yoke portion. Each winding slot is formed between adjacent tooth portions. The permanent magnets are disposed at intervals on a surface of the rotor core and magnetic poles of two facing sides of adjacent permanent magnets are the same. The rotor sheath is disposed outside the rotor assembly and is divided into at least two segments axially. A magnetic conductivity of a first segment of the rotor sheath is different from a magnetic conductivity of a second segment of the rotor sheath. | 12-24-2015 |
20150380993 | METHOD FOR OPERATING VARIABLE MAGNETIC FLUX MOTOR - Disclosed therein is a method of operating a variable magnetic flux motor. The method of operating the variable magnetic flux motor, which includes a rotor and a stator located inside the rotor, the rotor including first magnets and second magnets having a coercive force weaker than that of the first magnets, includes: a first step of operating the motor in an initially magnetized state of the second magnets; and a second step of operating the motor in an inversedly magnetized state of the second magnets by applying a magnetomotive force to the second magnets in the opposite direction to the magnetization direction of the second magnets. | 12-31-2015 |
20160013688 | LAMINATED CORE ARRANGEMENT AND ELECTRIC MACHINE WITH SUCH A LAMINATED CORE ARRANGEMENT | 01-14-2016 |
20160020008 | APPARATUS AND METHODS FOR MAGNET RETENTION - An apparatus and method for holding permanent magnet components, particularly on a rotor of an electrical machine. A magnet carrier ( | 01-21-2016 |
20160028296 | DOUBLE-STATOR ROTATING ELECTRIC MACHINE - A double-stator rotating electric machine includes a rotor and a pair of outer and inner stators. The outer stator has a first multi-phase coil wound thereon so as to form magnetic poles upon energization of the first multi-phase coil. The inner stator has a second multi-phase coil wound thereon so as to form magnetic poles upon energization of the second multi-phase coil. The number of the magnetic poles formed by the outer stator is equal to the number of the magnetic poles formed by the inner stator. Each of the magnetic poles formed by the outer stator is located at the same circumferential position as and has an opposite polarity to a corresponding one of the magnetic poles formed by the inner stator. The rotor has yoke portions each of which radially extends so as to form a magnetic flux passage magnetically connecting the outer and inner stators. | 01-28-2016 |
20160065012 | ELECTRIC MOTOR - An electric motor includes a yoke having six magnetic poles; a rotary shaft which is provided inside the yoke in a freely rotatable manner; an armature core ( | 03-03-2016 |
20160065014 | PERMANENT MAGNET FOR A ROTOR OF AN ELECTRIC MACHINE - A permanent magnet having end surfaces and an envelope curve shaped as a biconvex lens having first and second convex portions, magnetization running in an arcuate manner along the first convex portion between a north pole and a south poles. The permanent magnet runs along the second convex portion in an arcuate manner, and at least one of the magnet's end surfaces within the envelope curve has a connection surface adapted for connecting with a connection device by fusing or by positive engagement. The rotor is preferably pressed onto the shaft of the rotor after the connection device is formed around a connection surface of the permanent magnets by injection molding. | 03-03-2016 |
20160086701 | R-T-B BASED SINTERED MAGNET - An R-T-B based sintered magnet having R | 03-24-2016 |
20160094098 | ROTOR AND ROTATING ELECTRIC MACHINE - A rotor includes a rotor core and permanent magnets. The rotor core includes annular bodies that are stacked in a stacking direction and each formed of core segments arranged along a circumferential direction. The number of the core segments in each of the annular bodies is set based on k, where k is the number of magnetic poles formed by the permanent magnets. The rotor core has n through-holes, where n≧k. The rotor further includes n fixing members each of which extends in the stacking direction through one corresponding through-hole of the rotor core. Between each circumferentially adjacent pair of the core segments, there is formed a gap that is greater than a clearance provided between the through-holes of the rotor core and the fixing members. At least one of the annular bodies is circumferentially offset from another annular body by an integer multiple of one magnetic pole. | 03-31-2016 |
20160105059 | ROTOR OF A ROTARY ELECTRICAL MACHINE, AND ROTARY ELECTRICAL MACHINE COMPRISING A ROTOR OF THIS TYPE - A rotor which includes a plurality of permanent magnets arranged in first recesses which extend axially and are regularly distributed between a circumferential portion and a central portion of the magnetic body of the rotor, such as to define a plurality of circumferential polar sections. The magnets each comprise a first portion close to the circumferential portion, wherein the first portion is adjacent to a second portion close to the central portion, the first portion having a first rectangular radial section with a first predetermined width in a circumferential direction and the second portion having a second rectangular radial section with a second predetermined width in a circumferential direction, the second width being smaller than the first width. According to the invention, the rotor also includes a plurality of second recesses which extend axially and are each arranged between two example consecutive magnets at the second portion thereof. | 04-14-2016 |
20160126789 | PERMANENT MAGNET MOTOR - A permanent magnet (PM) motor includes a stator defining an inner stator opening. The inner stator opening extends along a stator axis. The PM motor further includes a rotor disposed inside the stator. The stator includes a plurality of lamination segments stacked together along the stator axis. Each lamination segment includes an annular stator body and teeth extending from the annular stator body toward the stator axis. The teeth are spaced apart from one another so as to define a plurality of slots arranged annularly about the stator axis. The stator defines slot openings arranged annularly about the stator axis. At least one of the lamination segments is rotationally offset relative to another lamination segments so that at least one of the slot openings is circumferentially offset from another slot openings in the other lamination segment. | 05-05-2016 |
20160141930 | Rotor for Electric Power Steering Motor, Electric Power Steering Motor with This, and Manufacturing Therefor - A rotor for an electric power steering motor is configured to include a rotor core having a step skew structure constituted of two independent cores as well as to use shrink fitting to fasten the two cores to a shaft. It may also be configured such that a magnetic center of the rotor core is adjusted by controlling a dimension thereof from a tip of the shaft and by shrink fitting the two cores. | 05-19-2016 |
20160164386 | DOUBLE-STATOR ROTATING ELECTRIC MACHINE - A double-stator rotating electric machine includes a rotor, an outer stator having an outer multi-phase coil wound thereon, and an inner stator having an inner multi-phase coil wound thereon. Each corresponding pair of phase windings of the outer and inner multi-phase coils are formed of at least one common electric conductor wire. The electric conductor wire includes a bridging portion that bridges the corresponding pair of phase windings of the outer and inner multi-phase coils across the rotor. The bridging portion extends obliquely with respect to both radial and circumferential directions of the rotor so that radially outer and radially inner ends of the bridging portion, which are respectively connected to the corresponding pair of phase windings of the outer and inner multi-phase coils, are circumferentially offset from each other by an offset angle θ. The offset angle θ is greater than 0° and less than 180° in electrical angle. | 06-09-2016 |
20160172916 | ROTOR WITH PERMANENT MAGNETS | 06-16-2016 |
20160190881 | MOTOR - A motor includes a stationary unit and a rotary unit arranged to rotate with respect to the stationary unit about a center axis extending in an up-down direction. The rotary unit includes a substantially cylindrical rotor holder, a plurality of magnets disposed radially inward of the rotor holder and arranged along a circumferential direction, and a non-magnetic magnet holder fixed to an inner circumferential surface of the rotor holder and arranged to hold the magnets. The magnet holder includes a plurality of pillars extending in the up-down direction and arranged to position the magnets in the circumferential direction, and a first ring and a second ring arranged to interconnect the pillars at positions spaced apart in the up-down direction. The first ring is positioned radially outward of the second ring, and the second ring is positioned radially inward of outer circumferential surfaces of the pillars. | 06-30-2016 |
20160380495 | SHORT CIRCUIT FAULT TOLERANT PERMANENT MAGNET MACHINE - A permanent magnet (PM) machine includes a rotor and a stator assembly. The rotor includes a plurality of permanent magnets disposed about an axis of rotation. The stator assembly includes a stator body, a plurality of coil sides and a plurality of sintered iron magnetic wedges. The stator body includes a plurality of stator teeth defining a plurality of stator slots, each stator slot having an inside position and an outside position, such that each of the plurality of stator slots includes a first plurality of inside positions, and a first plurality of outside positions. The first plurality of coil sides are disposed in each of the first plurality of inside positions and the first plurality of outside positions. The first plurality of coil sides correspond to a first power phase. The first plurality of coil sides are electrically coupled to one another by a first plurality of end-coils. The plurality of sintered iron magnetic wedges are disposed at the openings of at least one stator slot of the plurality of stator slots. | 12-29-2016 |
20160380498 | Direct Current Machine - A direct current machine comprises a stator and a rotor, one of them having a plurality of magnets alternatively magnetized north and south and the other one of them having a plurality of coils formed by winding insulated wire around teeth in order to provide a three-phase winding, wherein slots are formed between said coils and the coils are grouped in coil groups of four coils each, and a current controlled inverter for driving said machine, wherein each coil group has the same winding pattern so that each first coil of a coil group, seen in a direction of rotation, is wound in the same winding direction and two, in the direction of rotation, consecutive coil groups of the same phase are connected such that current flows through one in the direction of rotation and through the other one in a direction opposite to the direction of rotation. | 12-29-2016 |
20180026487 | ROTATING ELECTRICAL MACHINE | 01-25-2018 |
20190148999 | ROTOR, MOTOR, FAN, COMPRESSOR, AND AIR CONDITIONING APPARATUS | 05-16-2019 |