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| Number | Title | Issue Date |
| 8179011 | Brushless motor A brushless motor including a stator having teeth and a rotor having magnetic pole portions is disclosed. The magnetic pole portions are arranged to have the same polarities as each other. The rotor includes gaps that function as magnetic resistance at circumferenti... | 05/15/2012 |
| 8040010 | Permanent magnet type generator and hybrid vehicle using the same The present invention comprises a stator, and a rotor which is disposed oppositely to the stator with a gap interposed. The stator comprises a stator core, and a distributed stator winding mounted to the stator core. The stator core comprises a ring-like yoke core, ... | 10/18/2011 |
| 8018111 | 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... | 09/13/2011 |
| 7960886 | Rotating electric machine A rotating electric machine includes a stator having a plurality of winding phases formed by distributed winding, a rotor having a plurality of magnetic poles and an outer circumference facing the stator, a first groove formed in the outer circumference of the rotor... | 06/14/2011 |
| 7915776 | Permanent magnet type electric rotary machine and compressor using the same A permanent magnet type electric rotary machine includes a stator including a stator core having teeth and slots, and a rotor provided with permanent magnets as magnet poles in a rotor core. A pole core portion which between each of the permanent magnets and an oute... | 03/29/2011 |
| 7906882 | Permanent magnet rotating machine Permanent magnets 52a1, 52a2 are inserted into magnet insert holes 51a1, 51a4 formed in a main magnetic pole 50A of a rotor 50. An outer circumferential surface of the rotor includes... | 03/15/2011 |
| 7902712 | Magnetic member, rotor, motor, compressor, blower, air conditioner and vehicle-mounted air conditioner A magnetic member with an annular outer periphery and an inner periphery includes first portions and second portions alternately disposed in its circumferential direction. The first portions and second portions are magnetically separated in the circumferential direc... | 03/08/2011 |
| 7863793 | Field element core A field element core has field magnet through holes and connecting portions. The field magnet through holes are circumferentially arranged in a circumferential direction around a given direction, and are adjacent each other in the circumferential direction to form p... | 01/04/2011 |
| 7851959 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 12/14/2010 |
| 7847462 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 12/07/2010 |
| 7825560 | Motor A motor that reduces a cogging torque and rotates at a high speed is presented. The motor comprises: a shaft, a plurality of core blocks coupled to the shaft, a plurality of permanent magnets inserted into each of the core blocks, and an aligning unit, coaxial with ... | 11/02/2010 |
| 7795772 | Motor A motor is basically provided with a stator, a rotor, a low permeability layer and a current control device. The stator includes a magnetic stator core and a stator winding. The rotor includes a rotor core and a plurality of permanent magnets arranged to form N and ... | 09/14/2010 |
| 7786641 | Magnetic member, rotor and motor In the present invention, since gaps respectively provided at one ends of a field magnet through-hole respectively extend toward the other ends passing on the side of a periphery with respect to the field magnet through-hole, the radial dimension of the magnetic mem... | 08/31/2010 |
| 7768172 | Permanent magnet type electric rotary machine and compressor using the same A permanent magnet type electric rotary machine includes a stator including a stator core having teeth and slots, and a rotor provided with permanent magnets as magnet poles in a rotor core. A pole core portion which between each of the permanent magnets and an oute... | 08/03/2010 |
| 7732965 | Embedded magnet type motor An embedded magnet type motor is disclosed. The rotor core of the motor has radially extending first accommodation holes and V-shaped accommodation holes. Each V-shaped accommodation hole includes a second accommodation hole and a third accommodation hole. A first g... | 06/08/2010 |
| 7705504 | Embedded magnet type motor A rotor of an embedded magnet type motor has a plurality of magnets forming magnetic poles, the number of which is represented by P. A rotor core includes first accommodation holes, the number of which is represented by P/2, extending in a radial direction, and V-sh... | 04/27/2010 |
| 7667365 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 02/23/2010 |
| 7550889 | Asymmetrical composite magnet structure for lobed rotor An interior permanent magnet electric motor. A lobed rotor comprising composite slots and non-composite slots radially spaced from its longitudinal axis of rotation extending parallel to the axis. Ferrite magnets are positioned in both the composite and non-composit... | 06/23/2009 |
| 7545068 | Rotor for use in induction motor A rotor for use in an induction motor includes a main body installed to be rotatable by having a gap inside a stator, providing a flow path of magnetic fluxes produced from the coil, and including a plurality of conductors formed on an edge region of the main body; ... | 06/09/2009 |
| 7479723 | Permanent magnet machine rotor A rotor for an interior permanent magnet machine has a rotor body having an output shaft and a first cavity filled with magnetic material. Second cavities are disposed inboard of the first cavities and are not filled with magnetic material. Non-magnetic rods extend ... | 01/20/2009 |
| 7459821 | Permanent magnet assisted synRM and method for imposing magnetic force thereon A PMA (Permanent Magnet Assisted) synRM and a method for imposing a magnetic force thereon. Magnets are inserted into outer flux barriers of a plurality of flux barriers formed along the radius of a rotor, and bridges or slim portions are formed on inner flux barrie... | 12/02/2008 |
| 7446448 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 11/04/2008 |
| 7432624 | Rotor for a permanent-magnet electrical machine and a machine for manufacturing it The object of the invention is a rotor (4) for a permanent-magnet electrical machine, comprising an axle (6) mounted to the machine body with bearings, a rotor pack made of iron and arranged around the axle (6), as well as permanent magnets (... | 10/07/2008 |
| 7425786 | Permanent magnet type rotating electrical machine A permanent magnet type rotating electrical machine that is capable of producing a higher output and is suitable for high-speed rotation. A pair of nonmagnetic portions are formed in a rotor core at opposite ends of each pole. The waveform of induced voltage and a m... | 09/16/2008 |
| 7420306 | Brushless DC motor A brushless DC motor prevents disconnection of a magnetic flux and to minimize leakage of the magnetic flux, thereby reducing torque ripple. A plurality of magnetic flux-disconnection preventing holes are arranged in an outer periphery of a rotor core between instal... | 09/02/2008 |
| 7405504 | Rotor for rotary electric machine A rotor for a rotary electric machine includes a rotor core made of magnetic material, and being in the form of a disk, and a plurality of magnet sets each including a pair of permanent magnets whose polarities are identical to each other. The magnet sets are arrang... | 07/29/2008 |
| 7378773 | Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is ... | 05/27/2008 |
| 7362025 | Internal permanent magnet rotor having improved configuration of magnetic flux barriers At each permanent magnet in a rotor of an IPM rotary electric machine, each of a pair of flux barriers respectively disposed adjoining circumferentially opposed side faces of the magnet is formed with a trench portion that extends farther from a circumferential face... | 04/22/2008 |
| 7358638 | Method of determining pole arc ratio of interior permanent magnet rotary motor and interior permanent magnet rotary motor An interior permanent magnet rotary motor of the present invention has N slots and P permanent magnet magnetic pole sections, (⅔ | 04/15/2008 |
| 7355312 | Brushless Motor Small brushless motor having high output and small torque ripple. The brushless motor includes induction voltage adjusting means. With this, induction voltage of each phase of the stator is adjusted into a flatly spread waveform having no abrupt variation where odd-... | 04/08/2008 |
| 7352100 | Direct-current motor A stator of a direct current motor includes six magnetic poles. An armature of the direct current motor includes an armature core having eight slots, a plurality of windings wound around the armature core as concentrated windings, and a commutator having twenty-four... | 04/01/2008 |
| 7327062 | Rotor for rotary electric machine A rotor (10) for a rotary electric machine (1) comprises a rotation shaft (11), and a plurality of rotor cores (120-129) fixed to the rotation shaft (11) and axially split. The rotor cores (120-129) have outer ... | 02/05/2008 |
| 7327587 | System and method for power conversion An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a d... | 02/05/2008 |
| 7301310 | Excitation controlled synchronous permanent magnet machine The present invention provides an apparatus and methods for providing constant voltage from a permanent magnet generator at varying prime mover speeds or under varying loads. A constant voltage permanent magnet generator includes a housing, a magnetized rotor, a pri... | 11/27/2007 |
| 7282827 | Permanent magnet motor A permanent magnet motor has permanent-magnet-holding slots 5 formed in those parts of a rotor core 2A which correspond to sides of an approximately regular polygon centered on an axis of the rotor core 2A, permanent magnets 4 inserted in... | 10/16/2007 |
| 7233090 | Electric machine, in particular brushless synchronous motor An electrical machine, in particular a brushless synchronous motor has a stator (14) and a rotor (12) with salient poles (18) disposed distributed over its circumference, each of which poles has an enclosed permanent magnet (11) and a pol... | 06/19/2007 |
| 7230359 | Electric motor with poles shaped to minimize cogging torque An electric motor has a rotor (36) and a stator (28) having a lamination stack formed with slots (126). The slots have a predetermined slot pitch (τs), and a multi-phase stator winding is arranged in them. The rotor (36) has salient pole... | 06/12/2007 |
| 7205695 | High speed rotor An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavit... | 04/17/2007 |
| 7196446 | Rotor for an electric motor The invention relates to a rotor for an electric motor comprising an essentially cylindrical rotor core having a central aperture, and comprising permanent magnets which are embedded in the rotor core and extend essentially like spokes through the rotor core, the ra... | 03/27/2007 |
| 7176598 | Brushless DC motor A bridge (8) in conformity with a tooth opening angle of the stator (1) is provided between a permanent magnet (5) and a permanent magnet (5) in a rotor (4), so that a magnetic flux for a reluctance torque is made to pass an inner ... | 02/13/2007 |
