Class / Patent application number | Description | Number of patent applications / Date published |
310181000 | Combined permanent and electromagnet | 34 |
20080238238 | Apparatus and process for generating energy - Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into mechanical force, kinetic energy or electrical energy. | 10-02-2008 |
20090045691 | FIELD CONTROLLABLE ROTATING ELECTRIC MACHINE SYSTEM WITH MAGNETIC EXCITATION PART - In a magnet-exciting rotating electric machine, a magnetic excitation part for supplying a magnetic flux between a magnetic salient pole and an armature is composed to be divided into two so as to be capable of being relatively displaced. In this structure, the magnetic flux from the field magnet is divided into a main magnetic flux pathway that passes through the armature side and a bypass magnetic flux pathway that does not pass through the armature, and thereby, the magnetic flux of the main magnetic flux pathway is changed. The magnetic resistances of the main magnetic flux pathway and the bypass magnetic flux pathway are composed to be approximately equal, and then a magnetic force preventing the relative displacement is suppressed small. Thereby, the rotating electric machine system and the magnetic field control method in which magnetic field control is easy are provided. | 02-19-2009 |
20090200886 | DYNAMOELECTRIC MACHINE - Resin pooling grooves are disposed so as to extend over entire regions in a thickness direction of a first magnet holder on two sides of a bottom surface in a width direction of a first receiving groove, and resin pooling grooves are also disposed so as to extend over entire regions in the thickness direction of the first magnet holder on two side surfaces of the first receiving groove near the bottom surface. A first resin injection aperture is disposed through the first magnet holder so as to communicate with the resin pooling grooves over an entire region in the thickness direction. A first permanent magnet is held by the first magnet holder by fitting the first permanent magnet into the first receiving groove together with a first magnet cover, and injecting a resin material into the resin pooling grooves through the first resin injection aperture and hardening it. | 08-13-2009 |
20090295249 | HYBRID-TYPE SYNCHRONOUS MACHINE - A rotor core has permanent magnets. Magnetic flux of the permanent magnet of an even-numbered rotor magnetic pole part is guided in an axial direction by an axial magnetic path member. Magnetic flux of the permanent magnet of an odd-numbered rotor magnetic pole part is guided into a soft magnetic inner cylindrical part. The axial end faces of the inner cylindrical part and the axial magnetic path member protrude from the rotor core in the axial direction and face a stationary magnetic path member with a small gap therebetween. The amount of magnetic flux of the magnet, which the permanent magnet applies to a stator core is adjusted by an excitation current of an excitation coil wound on the stationary magnetic path member. | 12-03-2009 |
20090322176 | Synchronous motor with rotor having suitably-arranged field coil, permanent magnets, and salient-pole structure - A rotor of a synchronous motor includes a rotating shaft, a plurality of segments, a plurality of permanent magnets, and a field coil. The segments are located radially outward of the rotating shaft and arranged in the circumferential direction of the rotating shaft at a predetermined pitch with spaces formed therebetween. Each of the segments has a recess making up a magnetic reluctance portion and an opposite pair of ends making up salient-pole portions. Each of the permanent magnets is disposed in one the spaces between the segments with a predetermined orientation of its N and S poles. The field coil is wound around the segments to extend in the circumferential direction of the rotating shaft through the recesses of the segments. The field coil creates, when energized with DC current, magnetic flux which magnetizes the pair of ends of each of the segments in opposite directions. | 12-31-2009 |
20100013340 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine is disclosed, the machine comprising a stator | 01-21-2010 |
20100019606 | ROTATING ELECTRIC MOTOR - A rotating electric motor includes a stator core, a rotational shaft capable of rotation, a field yoke allowing a flow of magnetic flux in an axial direction, first and second rotor cores fixedly installed on the rotational shaft, a first magnet fixedly installed between the first rotor core and the second rotor core, a first rotor teeth formed at the first rotor core, a second magnet provided alongside of the first rotor teeth in the circumferential direction of the first rotor core, a second rotor teeth formed at the outer surface of the second rotor core, protruding outwardly in the radial direction, a third magnet provided alongside of the second rotor core in the axial direction, and windings that can control the density of magnetic flux between at least one of the first rotor core and second rotor core and the stator core. | 01-28-2010 |
20100026130 | Electric rotary machine for vehicle - An AC alternator for a vehicle has a rotor having a pair of pole cores, and a stator. A plurality of claw magnetic pole parts are formed in the pole cores. A permanent magnet is placed between a pair of the claw magnetic pole parts so as to prevent leakage of magnetic flux through the area between the adjacent claw magnetic pole parts. The stator and the rotor are placed in the AC alternator so that the stator faces the rotor at a spacing of predetermined intervals. Flanges are formed at both sides of each of the claw magnetic pole parts. The presence of the flanges fixes the permanent magnets to the pole cores, and prevents them from moving toward the outer radius direction measured from the rotary shaft of the rotor. In particular, the thickness of each of the flange parts is increased from the front end part to the bottom part thereof. | 02-04-2010 |
20100096941 | DYNAMOELECTRIC MACHINE - A dynamoelectric machine including first and second permanent magnets held by first and second magnet seats on first and second yoke portions so as to face inner circumferential surfaces of tip end portions of first and second claw-shaped magnetic pole portions. The first and second permanent magnets are magnetically oriented in a reverse direction to orientation of a magnetic field that the field coil produces. The dynamoelectric machine enables permanent magnet holding reliability to be increased, induced voltage during no-load de-energization to be suppressed, and thermal demagnetization of magnets due to high-frequency magnetic fields that are induced by stator slots to be avoided. | 04-22-2010 |
20100133942 | Permanent Magnet Arrangement for Generator Rotor - An electric generator rotor having one or more permanent magnets coupled thereon. The permanent magnets provide a constant magnetic field in the rotor at all times, therein minimizing the effect of rotor residual magnetism on the start-up characteristics of the electric generator. The type and placement of the one or more permanent magnets on the rotor and/or magnetic field confinement techniques may be utilized to control spatial distribution of magnetic field within the rotor. | 06-03-2010 |
20100207480 | ELECTRIC MACHINE COMPRISING A ROTOR WITH HYBRID EXCITATION - A synchronous electric machine having a fixed stator, a multi-phase stator winding and having a rotor which has poles, excited in a predefined sequence, over its circumference, the number of poles being changeable as a function of the intensity and the direction of a field current in at least one field coil of the rotor. For improving the efficiency of the machine and for reducing the number of field coils and the entire coil cross section it is provided that the rotor has a laminated core, laminated in the axial direction, which has grooves on the circumference for accommodating the at least one field coil and that the at least one field coil is situated on the circumference of the rotor with a step size which corresponds to the pole pitch of the lower number of poles. | 08-19-2010 |
20100231080 | ALTERNATING-CURRENT DYNAMO-ELECTRIC MACHINE - An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets. | 09-16-2010 |
20100289371 | INTERPOLE ASSEMBLY FOR ROTATING ELECTRICAL MACHINE | 11-18-2010 |
20110001383 | DYNAMOELECTRIC MACHINE - The present invention provides a dynamoelectric machine that enables permanent magnets to be held stably in trough portions that are formed on portions of a yoke portion that are positioned between adjacent claw-shaped magnetic pole portions. | 01-06-2011 |
20110043068 | DYNAMOELECTRIC MACHINE - A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance. | 02-24-2011 |
20110084567 | ROTATING ELECTRIC MACHINE SYSTEM - A rotating electric machine system includes a rotor having a rotor plane. The rotor includes magnetic salient poles of more than one in a circumferential direction on the rotor plane. Adjacent magnetic salient poles are magnetized in different polarities from each other by a permanent magnet. A control magnet is arranged in an inside part of the adjacent magnetic salient poles. An excitation coil is placed so as to make an excitation flux collectively in the rotor. The magnetization state of the control magnet where the magnetic flux by the armature coils and the excitation flux flow in a same direction is changed irreversibly. An amount of the magnetic flux flowing through the armature coils is controlled by changing the magnetization state of the control magnet in accordance with an output of the rotating electric machine system so that the output is optimized. | 04-14-2011 |
20110127873 | ROTOR FOR ROTARY ELECTRIC MACHINE WITH REDUCED-MASS INTERPOLAR STRUCTURES - A rotor with poles in the form of claws, of a rotary electrical machine. This rotor comprises a plurality of interpolar magnetic assemblies. On a radial cross-sectional plane, a first total magnet surface of a section of the magnetic assembly is smaller than a second surface defined by the product of the radial height of a face (h) of the magnetic assembly ( | 06-02-2011 |
20110210637 | ROTOR FOR AN ELECTRIC MACHINE WITH REDUCED DETENT TORQUE - The invention relates to an electric machine, in particular to a generator for supplying the electrical system of a motor vehicle, comprising a laminated rotor ( | 09-01-2011 |
20110227442 | ELECTRIC MACHINE - The invention relates to a synchronous machine with hybrid energisation, in particular a generator for supplying the electrical system of a motor vehicle, comprising a laminated stator ( | 09-22-2011 |
20110273050 | ADJUSTABLE AXIAL-FLUX DISC MOTOR - An adjustable axial-flux disc motor, that is used in a flat space formed at a side or at the center of a wheel center for driving the wheel to rotate. The motor is activated to perform a rotation movement by the interactions of an electromagnetic field formed from the passing of an electric current through the armatures of its stator and a magnetic field resulting from the permanent magnet of its rotator. Moreover, there is a circular air gap sandwiched between the stator base and the rotator base, and the permanent magnet is further surrounded by coils. By adjusting the excitation current of the coils, the magnetic flux intensity can be modulated accordingly, and as the air gap magnetic flux is varied with the relative positioning of the stator and the rotator, the output characteristic of the motor will be varied accordingly. | 11-10-2011 |
20120056502 | AC Electric Machine With Claw Poles - An AC claw-pole electric motor includes a casing, a stator connected with the casing, a rotor and two exciting parts. The rotor includes a rotor shaft ( | 03-08-2012 |
20120187794 | LUNDELL TYPE ROTATING MACHINE - Provided is a Lundell type rotating machine with high efficiency and high output, which has a rigid and magnetically advantageous magnet retention structure. A rotor iron core includes laminated magnetic-pole members mechanically and magnetically coupled to two laminated magnetic end plates, which extend in an axial direction so as to be brought into meshing engagement with each other to constitute a Lundell type rotor iron core, and permanent magnets provided between the magnetic-pole members. The magnetic-pole members are retained in predetermined positions between the magnetic end plates by dovetail grooves of a non-magnetic retention body over substantially the entire lengths. The permanent magnets are held in direct contact with the magnetic-pole members so as to be interposed therebetween. Thus, the magnet retention structure which is mechanically rigid and magnetically highly efficient even when increased in size can be obtained. | 07-26-2012 |
20120212096 | ROTARY ELECTRIC MACHINE - A bobbin is mounted to a rotor such that a rotation arresting portion is housed in a space that is formed by a rotation arresting portion housing recess portion and a stepped portion so as to restrict circumferential movement, and a permanent magnet is made into a quadrangular prism that has a rectangular bottom surface, and is held by a magnet holding seat by placing a bottom surface on an upper surface of a magnet holding portion, and fixing to the magnet holding seat a cover that is mounted from radially outside to restrict circumferential, axial, and radial movement. | 08-23-2012 |
20120248921 | ROTARY ELECTRIC MACHINE WITH ARMATURE MAGNETIC REACTION COMPENSATION - The machine of the invention includes an inductor ( | 10-04-2012 |
20130162093 | SYNCHRONOUS ROTARY ELECTRIC MACHINE HAVING A HYBRID-EXCITATION ROTOR - A machine ( | 06-27-2013 |
20130162094 | SYNCHRONOUS ROTARY ELECTRIC MACHINE HAVING HYBRID- EXCITATION ROTOR - A machine ( | 06-27-2013 |
20130187508 | Shutter with Bistable Actuator Having Power-Free Magnetic Blade Return - The instant invention teaches a monostable shutter with magnetic blade return using a bistable actuator with blade motion constrained to provide drive force in a single direction and permits the use of compact bistable coil for continuous use by a circuit that applies a high voltage at the beginning of drive that decays to a lower voltage to prevent coil burn out. | 07-25-2013 |
20130328434 | Switch type DC brushless electric machine having auxiliary excitation winding set - The present invention provides an auxiliary excitation winding set to be installed at the rotary part of the electric machine ( | 12-12-2013 |
20140077654 | ROTOR OF MOTOR AND SYNCHRONOUS MOTOR HAVING THE SAME AND WOUND ROTOR SYNCHRONOUS MOTOR - Disclosed is a rotor for a motor in a vehicle. More specifically, the rotor includes a rotation shaft serving as a center of rotation of the rotor, a core installed at the rotation shaft and comprising a plurality of teeth radially protruding with respect to the rotation shaft, a coil wound around the tooth to generate a magnetic field by an external power source, and a pair of permanent magnets installed at both sides of the teeth. Also disclosed is a synchronous motor including the rotor, and a wound rotor synchronous motor. | 03-20-2014 |
20140091665 | ELECTRIC ROTATING MACHINE, MAINLY FOR STARTER OF AUTOMOTIVE VEHICLE - A DC electric rotating machine, mainly for the starter of an automotive vehicle. The machine includes a stator including a wound structure forming a plurality of poles extending along the circumference of the stator, a rotor, and a set of brushes adapted for the electric supply of the rotor by commutation of the electric current in sections of the rotor. The wound structure of the stator includes a plurality of slots between two central parts of consecutive poles of the stator, these slots being formed in a magnetic body of the stator. At least one of the slots including at least one conducting segment forming a winding of an electrical coil. | 04-03-2014 |
20140184010 | ELECTRIC MACHINE - The invention relates to a synchronous machine with hybridenergisation, in particular a generator for supplying the electrical system of a motor vehicle, comprising a laminated stator ( | 07-03-2014 |
20140285053 | FLUX CONTROLLED PM ELECTRIC MACHINE ROTOR - A flux-regulated permanent magnet machine (PMM) includes a stationary portion and a rotating portion. The stationary portion includes a plurality of stator/armature windings. The rotating portion includes a plurality of permanent magnets and a control/field winding that is supplied with current to control the magnetic flux presented to the stator/armature windings. | 09-25-2014 |
20140368077 | HYBRID EXCITATION ROTATING ELECTRICAL MACHINE - A hybrid excitation rotating electrical machine configured with a rotor having a shaft extended on at least one side in an axial direction, and first and second cores that are separated in the axial direction with a gap between the cores. First magnetic poles that are excited by a permanent magnet and second magnetic poles that are not excited by the permanent magnet are alternately arranged in a circumferential direction in each of the first and second cores. The first magnetic poles of the first core have a different polarity from that of the first magnetic poles of the second core, and the first magnetic poles of one of the first and second cores are placed so as to face the second magnetic poles of the other of the first and second cores in the axial direction with the gap between the magnetic poles. | 12-18-2014 |
20150084472 | Electrical Power Motor-Generator Excited by Magnetic Transference - The invention relates to an electrical power motor-generator excited by magnetic transference, and which further comprises a stator ( | 03-26-2015 |