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| Number | Title | Issue Date |
| 7868512 | Motor-generator system with a current control feedback loop A motor-generator system with a current control feedback loop for generating electrical energy in stationary, portable, and automotive applications. The generator includes a housing defining an interior space and including a first portion and a second portion; an el... | 01/11/2011 |
| 7414343 | Hybrid-excited rotating machine, and vehicle with the hybrid-excited rotating machine A hybrid-excited rotating machine comprising: a stator winding of a multi-phase Y-connection; a plurality of rotor magnetic poles fixed on a rotor shaft 3 at a predetermined spacing in the circumferential direction and confronting the inner circumference of s... | 08/19/2008 |
| 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 |
| 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 |
| 7215055 | Vehicle A rotating electric machine comprises a stator having stator salient poles, three-phase windings wound around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said sta... | 05/08/2007 |
| 7202585 | Brushless motor A brushless motor is capable of increasing output torque while suppressing an increase in iron loss. A plurality of magnets are magnetized in reverse radial orientation in such a manner that magnetic fields directed toward a stator converge toward the stator, and ea... | 04/10/2007 |
| 7200474 | Vehicle occupant protection apparatus Protection apparatus includes: a seat back pivotable between reclined and upright positions; a pivoting-angle adjustment section for adjusting the pivoting angle of the seat back through a motor; a prediction section for predicting an object likely to collide agains... | 04/03/2007 |
| 7196447 | Rotating electric machine A rotating electric machine comprises a stator having stator salient poles, three-phases windings wound around the stator salient poles, a rotor rotatable held inside the stator, and permanent magnets inserted into the rotor and positioned opposite to the stator sal... | 03/27/2007 |
| 7183683 | Inner magnet of a magnetic coupling An inner magnet assembly for a rotary magnetic coupling, the inner magnet assembly having an inner ring body with magnet guides, magnets and an overlying sleeve. ... | 02/27/2007 |
| 7148598 | Spoke permanent magnet rotors for electrical machines and methods of manufacturing same A rotor assembly for an electric motor includes a spoke permanent magnet rotor and a shaft connected thereto. The spoke permanent magnet rotor has an axis of rotation, permanent magnet material, and ferro-magnetic material. The permanent magnet material extends outw... | 12/12/2006 |
| 7129672 | Controller apparatus for synchronous motor and controlling method thereof For providing a controller apparatus for a synchronous motor and a controlling method thereof, enabling to be manufactured, easily and cheaply, and to obtain a lock mechanism, but without necessity of mechanisms, such as, an electromotive lock mechanism, wherein the... | 10/31/2006 |
| 7129611 | Method and radial gap machine for high strength undiffused brushless operation A radial gap brushless electric machine (30) having a stator (31) and a rotor (32) and a main air gap (34) also has at least one stationary excitation coil (35a, 36a) separated from the rotor (32) by a s... | 10/31/2006 |
| 7122930 | Electric motor An electric motor including a stator with a plurality of coils wound around a ring-shaped iron core, and a rotor rotatably disposed inside the stator is provided. The rotor includes a rotor shaft and a yoke. The yoke is provided near its periphery with a plurality o... | 10/17/2006 |
| 7105972 | Controller and magnetically driven wheel for use in a radial/rotary propulsion system The radial/rotary propulsion system of the present invention features a flywheel having concentric rings of permanent magnets attached to one or both sides or embedded into the flywheel. These permanent magnets interact with DC powered electromagnets which, when sel... | 09/12/2006 |
| 7081696 | Polyphasic multi-coil generator A polyphasie multi-coil generator includes a drive shaft, at least first and second rotors rigidly mounted on the drive shaft so as to simultaneously synchronously rotate with rotation of the drive shaft, and at least one stator sandwiched between the first and seco... | 07/25/2006 |
| 7030518 | Position-control stage with onboard linear motor A position-control stage is disclosed which makes it possible to extend largely an angular movement in circular direction for position control, rendering the stage itself compact in construction, allowing to work with high precision in clean environment and further ... | 04/18/2006 |
| 7009319 | Controlling electric motor cogging A method of determining magnet pole geometry for controlling cogging in an electric motor includes defining the magnet pole geometry in terms of at least one design parameter, predicting cogging as a function of the design parameter, and from the predicted cogging, ... | 03/07/2006 |
| 6977453 | Electric rotating machine provided with a field control coil In a rotating electric machine using permanent magnets and a field control coil, to allow the properties of the rotating electric machine to be readily changed and the rotating electric machine to be adapted to various applications even when it is made of common com... | 12/20/2005 |
| 6949856 | Permanent magnet rotating electric machine and electrically driven vehicle employing same A rotating electric machine comprises a stator having stator salient poles, three-phases windings wound around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said st... | 09/27/2005 |
| 6940205 | Permanent magnet synchronous motor The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrating windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg | 09/06/2005 |
| 6940199 | Permanent magnet rotor and brushless motor In a rotor 20 including a plurality of permanent magnet pieces 60 fixed in a plurality of magnet insertion slots 43 provided on the outer periphery of a rotor yoke 40, respectively, and the rotor yoke 40 having concaves 44 e... | 09/06/2005 |
| 6906444 | Permanent magnet motor Each permanent magnet formed in an open-letter shape is divided into a plurality of parts, the divided magnets are respectively fitted in open letter-shaped inserting portions, and ribs are respectively provided in dividing portions of the permanent magnets. Accordi... | 06/14/2005 |
| 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 |
| 6885122 | Permanent magnet motor/generator A motor/generator (1) comprises a permanent magnets (3) having a V-shaped surface projecting in the center of a rotor (2). These permanent magnets (3) are disposed so that the V-shaped surface faces the center of the rotor (2). In ... | 04/26/2005 |
| 6858968 | Synchronous motor, fan, compressor, refrigeration and air-conditioning machines The conventional slit is symmetrically aligned with respect to the q-axis that is a direction where the magnetic flux is difficult to flow. Because of this, the generated magnetic flux must jump over the slit, whereas its jumping over position being dependent on the... | 02/22/2005 |
| 6847144 | Permanent magnet rotor assembly for interior permanent magnet electric motor A permanent magnet rotor for a brushless electric motor, comprising at least two main magnetic poles, disposed on a periphery of a rotor. Each opening angle A covers N/2 times the opening angle of each of the stator sections, with N being an odd number greater or eq... | 01/25/2005 |
| 6724115 | High electrical and mechanical response structure of motor-generator An AC motor-generator includes a rotor made up of a first inductor core and a second inductor core arrayed in an axial direction of a rotary shaft. A plurality of permanent magnets are arrayed at an interval of 2π in electrical angle of an armature away from each o... | 04/20/2004 |
| 6664688 | Rotor for a motor To provide a rotor for a motor capable of effecting improved torque variation due to improvement in the induced voltage waveform and of effecting improved magnet torque in a permanent magnet type synchronous motor utilizing reluctance torque. A rotor 11 c... | 12/16/2003 |
| 6590312 | Rotary electric machine having a permanent magnet stator and permanent magnet rotor A rotary electric machine for a hybrid vehicle includes a rotor connected between a vehicle engine and a torque transmission mechanism at the back of the vehicle engine and a stator. The rotor includes an outer rotor portion having an inner surface electr... | 07/08/2003 |
| 6531799 | Hybrid electric machine with two rotors, permanent magnet poles and controllable field current An electric machine or assembly 10 including a housing 12, a stationary stator 14, two substantially identical and opposed rotors 16, 18, and a pair stationary field coils 22, 24. Field coils 22, 24 are selectively energizable to controllably vary the flu... | 03/11/2003 |
| 6472789 | Electric rotary machine with novel rotor excitation arrangement by permanent magnets The invention relates to an electric rotary machine having a stator with several slots for receiving field coils and a rotor having excitation means with main permanent magnets housed in a rotor structure to define a plurality of successive North and Sout... | 10/29/2002 |
| 6441522 | Electromagnetic apparatus employing high permeability low conductivity element A pole for use in a magnetic circuit includes a flux-passing portion for passing magnetic flux and a cap. The flux-passing portion has a face through which at least some of the magnetic flux passes and to which the cap is fixed. The cap is made of a perme... | 08/27/2002 |
| 6034458 | DC brushless motor having an interior permanent magnet rotor with optimal magnet thickness/air gap relationship A DC brushless motor 3 is provided which comprises armature 31 and rotor 32. Rotor 32 is provided with a rotor yoke that has four main poles 321 on its periphery. Slots with a radial-direction size of Lm are formed on main poles 321 of the roto... | 03/07/2000 |
| 5898253 | Grain oriented composite soft magnetic structure A soft magnetic structure substantially comprised of a plurality of magnetic field carrying particles molded and retained in a predetermined shape, bonded in that shape by an insulating binding agent, wherein said particles have grain alignment substantia... | 04/27/1999 |
| 5844344 | DC brushless motor having auxiliary salient poles A DC brushless motor 3 is provided which comprises armature 31 and rotor 32. Rotor 32 is provided with a rotor yoke that has four main poles 321 on its periphery. Slots with a radial-direction size of Lm are formed on main poles 321 of the roto... | 12/01/1998 |
| 5753989 | Hybrid alternator A hybrid alternator comprising a stator, and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core defining a plurality of magnetic poles, adjacent ones of the magnetic poles having alternatin... | 05/19/1998 |
| 5719458 | Power generator with improved rotor A power generator includes an electromagnet for generating a rotating magnetic field when being excited by a three-phase alternating current applied thereto, a rotation output shaft rotatably supported on a supporting member in such a manner as to be posi... | 02/17/1998 |
| 5717316 | Motive power generating apparatus utilizing energy of permanent magnet A motive power generating apparatus using magnetic flux from permanent magnets providing higher efficiency and torque is disclosed. An apparatus of one embodiment according to the present invention comprises a ring-shaped stator (10) formed of magnetic ma... | 02/10/1998 |
| 5530307 | Flux controlled permanent magnet dynamo-electric machine A brushless, permanent magnet dynamo-electric machine (50) has a stator assembly (52) and a rotor assembly (RA). The rotor assembly includes a rotor (R) mounted on a rotor shaft (RS). The stator assembly has a plurality of inwardly salient poles (54) and ... | 06/25/1996 |
