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| Number | Title | Issue Date |
| 8044546 | Permanent magnet machine A permanent magnet electric machine with optimum motoring efficiency is disclosed. It is adapted for use in a hybrid electric vehicle powertrain. An asymmetric magnetic flux distribution pattern in the rotor of the machine is established by asymmetrically positionin... | 10/25/2011 |
| 7969056 | 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 be... | 06/28/2011 |
| 7791236 | Permanent magnet machine A permanent magnet electric machine with optimum motoring efficiency is disclosed. It is adapted for use in a hybrid electric vehicle powertrain. An asymmetric magnetic flux distribution pattern in the rotor of the machine is established to improve operating efficie... | 09/07/2010 |
| 7321177 | Synchronous electric motor A synchronous electric motor including a rotor having a rotation axis, and a stator surrounding the rotor through a gap. The rotor includes a rotor core having an outer circumferential surface extending about the rotation axis and a plurality of permanent magnets at... | 01/22/2008 |
| 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 |
| 7279821 | Motor A motor includes a rotor, a rotor core included in the rotor, the rotor core being configured to be embedded, therein, with at least one first magnet, a pair of end plates, one of the pair of end plates being positioned at an axial end of the motor, an other one of ... | 10/09/2007 |
| 7250702 | Rotary electric machine comprising a stator and two rotors The invention relates to an electric machine comprising a stator (10, 40) provided with a plurality of teeth (11, 41), each tooth supporting at lest one individual coil (13, 46, 47), an external rotor (30) which is radially arranged outsi... | 07/31/2007 |
| 7235909 | Electromagnetic motor/generator In some embodiments, an electromagnetic motor/generator may include one or more of the following features: (a) a frame, (b) a magnetic section having an upper magnet, a lower magnet, and a center magnet, coupled to the frame, and (c) at least one solenoid coupled to... | 06/26/2007 |
| 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 |
| 7116027 | Magnet for a dynamo-electric machine A magnet for a dynamo-electric machine has a plurality of magnetic poles disposed substantially in a circular shape and opposite a plurality of teeth disposed substantially in a circular shape, the magnetic poles and teeth separated by a gap in an axial direction of... | 10/03/2006 |
| 6891295 | Flywheel magneto generator A flywheel magneto generator which comprises a rotor having a magnet attached to an outer circumferential side of a flywheel and a stator constructed by winding a generating coil around a core having a magnetic pole portion opposed to a magnetic pole of the rotor, w... | 05/10/2005 |
| 6873235 | Shear force levitator and levitated ring energy storage device One or more permanent magnets, or one or more permanent magnet arrays are used to produce shear force levitation. A primary application of shear force levitators is a levitated ring energy storage device. Such a levitated ring energy storage device includes a round ... | 03/29/2005 |
| 6700297 | Superconducting PM undiffused machines with stationary superconducting coils A superconducting PM machine has a stator, a rotor and a stationary excitation source without the need of a ferromagnetic frame which is cryogenically cooled for operation in the superconducting state. PM material is placed between poles on the rotor to p... | 03/02/2004 |
| 6608424 | Rotary electric machine having annular rotor core with slits In an alternating current generator, a rotor is provided radially inside a stator core. A rotor core has a cylindrical boss press-fit around a rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, and claw pieces ... | 08/19/2003 |
| 6573634 | Method and machine for high strength undiffused brushless operation A brushless electric machine (30) having a stator (31) and a rotor (32) and a main air gap (34), the rotor (32) having pairs of rotor pole portions (22b, 22c, 32f, 32l) disposed at least partly around the axis of rotation (32p) and facing the main air gap... | 06/03/2003 |
| 6548931 | Hybrid permanent magnet/synchronous machines A rotor 33, 133 for use in an electrical machine 100 having permanent magnets 34, 134 included therein, each permanent magnet 34, 134 between an adjacent pair of poles 32, 132, wherein each adjacent pole 32, 132 has an opposite polarity. Each permanent ma... | 04/15/2003 |
| 6342745 | Reluctance type rotating machine with permanent magnets A reluctance type rotating machine includes a stator 1 having armature windings 2 arranged on an inner periphery of the stator 1, a rotor 3 having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets 6 arranged for n... | 01/29/2002 |
| 6329734 | Permanent magnet and reluctance type rotating machine A permanent magnet-reluctance type rotating machine includes an annular stator having armature windings arranged on an inner periphery of the stator, a rotor rotatably arranged inside the stator and a plurality of permanent magnets disposed in a rotor cor... | 12/11/2001 |
| 6323572 | Magnet type electric motor and generator To obtain the magnetic flux increase of the air gap, a radial slit for inserting a magnet is provided in a respective pole iron core, and the length of the magnet is adjusted to a radial direction and to an axial direction. In particular, when it is desir... | 11/27/2001 |
| 6137199 | Alternator with permanent magnet rotor having primary magnets and blocking-pole magnets A permanent magnet rotor alternator is disclosed having a one-piece, rotor hub.backslash.flywheel.backslash.starting gear. Three high remanence ceramic permanent magnets provide a rotor having a contiguous ring of twelve alternating poles which allows for... | 10/24/2000 |
| 5808392 | Permanent magnet type rotating machine A permanent magnet type rotating machine includes a stator core provided on an inner periphery thereof with armature windings, a rotor core, a plurality of permanent magnets arranged on an outer periphery of the rotor core, and a magnetic ring arranged be... | 09/15/1998 |
| 5013951 | Multipolar rotor for electric machine with interpolar and polar magnets A multipolar rotor of an electric machine, essentially in the form of a circular cylinder, comprising an even number of pole magnets (1), which is equal to at least four, said pole magnets (1) being arranged uniformly along a circle and interpole magnets ... | 05/07/1991 |
| 4717850 | Two-pulse brushless d.c. motor with auxiliary rotor poles In the case of a two-pulse brushless d.c. motor narrow auxiliary poles (81-84; 115-122) are provided in the region of the boundaries (44, 45) between neighboring main poles of the rotor, the auxiliary poles being at least in part of polarity opposite to t... | 01/05/1988 |
| 4645961 | Dynamoelectric machine having a large magnetic gap and flexible printed circuit phase winding A dynamoelectric machine having a large magnetic gap and flexible printed circuit phase windings includes a multi-pole samarium cobalt magnet assembly consisting of radially aligned magnets and circumferentially positioned interpole magnets attached to a ... | 02/24/1987 |
| 4339874 | Method of making a wedge-shaped permanent magnet rotor assembly A rotor assembly having self-locking wedge-shaped permanent magnets.... | 07/20/1982 |
| 4308479 | Magnet arrangement for axial flux focussing for two-pole permanent magnet A.C. machines A two-pole permanent magnet A.C. machine employs one set of permanent magnets disposed with their magnetic axes parallel to the axis of rotation of the rotor and a second set of permanent magnets disposed so that their magnetic axes are oriented radially.... | 12/29/1981 |
| 3979821 | Method of manufacturing rare earth permanent magnet rotor A rotor containing rare earth magnet material which can be assembled, machined and then magnetized. A stack of laminations is built up, pieces of virgin rare earth magnet material are inserted in the slots provided therefor in the laminations, the laminat... | 09/14/1976 |
