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| Number | Title | Issue Date |
| 7944108 | Brushless motor and actuator using it A motor for driving an actuator used such as for a throttle valve of an automobile engine and an optical axis controller of an automobile headlight. In two cup-shaped rotor yokes each provided with an internal diameter enlarged part at its opening, a ring-shaped joi... | 05/17/2011 |
| 7919893 | Permanent magnet rotor with annular rib coupling A motor rotor includes a hub having a peripheral wall. A metal ring includes an engaging portion. The metal ring is formed by bending a strip of metal plate to form a cylindrical ring. The metal plate includes first and second positioning portions on two ends thereo... | 04/05/2011 |
| 7898136 | Permanent magnet rotor assembly An illustrative embodiment of the present invention is concerned with a permanent magnet rotor for an electric machine provided with an internal stator and a coaxial external rotor. To overcome the drawbacks associated with the use of an adhesive to mount the perman... | 03/01/2011 |
| 7847459 | Magneto generator A magneto generator can increase a suppression force to suppress permanent magnets from being moved to an opening side of a flywheel with easy construction and at low cost. In this magnet generator, the flywheel has a groove formed on its inner peripheral wall surfa... | 12/07/2010 |
| 7816831 | Spindle motor Provided is a spindle motor. The spindle motor includes a base, a bearing housing, a bearing, a shaft, a stator, and a rotor. The bearing housing is disposed at the base. The bearing is fixed to an inside of the bearing housing. The shaft is rotatably supported by t... | 10/19/2010 |
| 7683515 | Rotating field machine with bell-shaped rotor An electrical drive comprising stationary outer and inner stators; a rotatably mounted rotor with at least one pot-shaped element having a cylindrical wall and a base wall, wherein the cylindrical wall is thin-walled and made of magnetic material, wherein the base w... | 03/23/2010 |
| 7557481 | Rotor for an electrical machine A rotor 10 for an electrical machine comprising a rotor body 12, at least one magnet 18 coupled to the rotor body 12 and a retainer 22 for retaining the at least one magnet 18 to the rotor body 12, the retainer 22 | 07/07/2009 |
| 7495362 | Electrical fan A electrical fan includes a frame (10) having a central tube (11), a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by a bearing in the stator. T... | 02/24/2009 |
| 7443068 | Spindle motor A spindle motor includes a rotor magnet including a plurality of pairs of magnetic poles polarized in a radial direction and arranged along a circumferential direction of the rotor magnet and a rotor hub supporting the rotor magnet and being rotatable around an axis... | 10/28/2008 |
| 7443073 | Electric fan An electric fan includes a frame (10) having a central tube (12) extending therefrom, a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by the bea... | 10/28/2008 |
| 7402930 | Magnetoelectric generator A magnetoelectric generator according to the present invention includes: a bowl-shaped flywheel that rotates around an axis of rotation; a permanent magnet unit that is fixed to an inner circumferential wall surface of the flywheel and in which adjacent permanent ma... | 07/22/2008 |
| 7397158 | Motor for washing machine A motor for a washing machine including a driving shaft coupled to a drum, a stator for forming a magnetic field with a coil wound on a core, and a rotor rotatably mounted on an outside of the stator coupled to the driving shaft for driving the driving shaft, wherei... | 07/08/2008 |
| 7336012 | Motor, robot, substrate loader, and exposure apparatus An apparatus that reduces vibration generation and magnetic leakage, wherein the apparatus is a motor, an articulated serial robot that has a motor built in, a substrate loader that includes the articulated robot, and a related exposure apparatus equipped with the s... | 02/26/2008 |
| 7315102 | Axial gap motor An axial gap motor is described which comprises a rotor shaft rotatable about its axis in case. A rotor is fixed to the rotor shaft to rotate therewith. The rotor includes a plurality of magnets. A stator is disposed about the rotor shaft at a position to coaxially ... | 01/01/2008 |
| 7312550 | Architecture for electric machine In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul... | 12/25/2007 |
| 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 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7288869 | Stepping motor A stepping motor comprising a circular stator core having a plurality of pole teeth at an inner circumferential edge and an air core coil fitted to the periphery of the pole teeth. An insulating film is formed on the surface of the air core coil. An insulation sheet... | 10/30/2007 |
| 7279820 | Transversal flux machine A machine with transversal flux comprises a stator and a rotor. Therein, either the stator has a coil arrangement and the rotor is provided with permanent magnet elements, or the rotor may have a coil arrangement and the stator is provided with permanent magnet elem... | 10/09/2007 |
| 7271517 | Three-phase alternating current generator A three-phase alternating current generator includes a bowl-shaped flywheel, sixteen permanent magnets provided on an inner circumferential surface of the flywheel, and a stator located in the flywheel. Further, The stator is composed of twelve teeth provided opposi... | 09/18/2007 |
| 7239057 | Single phase induction motor A single phase induction motor comprises: a stator installed at an inner circumferential surface of a motor body, the stator on which a plurality of coils are wound; a rotor rotatably installed at a center portion of the stator and provided with a rotation shaft at ... | 07/03/2007 |
| 7230357 | External rotor motor and method for assembling such a motor A method of rapidly assembling the rotor (22) of an external-rotor motor (20) onto a bearing support tube (70) and in a predetermined axial position relative to the latter, includes the steps of: beginning at a rotor cup portion (24) of t... | 06/12/2007 |
| 7211917 | Motor with a magnet fixed on the inner peripheral face of a circumferential wall A motor includes a circumferential wall part of a case provided with an opening part on one end side in an axial direction and at least a magnet fixed to the inner peripheral face of the circumferential wall part. At least a part of the outer peripheral face of the ... | 05/01/2007 |
| 7193340 | Low-profile stepping motor A low-profile stepping motor is disclosed, which is preferably used in downsized and lower-profiled electronic devices, such as a printer, a facsimile, a floppy disk drive, and the like. The motor comprises a stator assembly composed of first and second stator units... | 03/20/2007 |
| 7190549 | Slim spindle motor and micro-drive apparatus comprising the same A slim spindle motor and a micro-drive apparatus including the slim spindle motor are provided. In the spindle motor, a hub is rotatably mounted on a base plate by ball bearings. The hub is used to seat a disk thereon. A ring-shaped magnet is engaged to the outer bo... | 03/13/2007 |
| 7166942 | Magneto-generator A magneto-generator includes: a plurality of magnets disposed being bonded to an inner circumferential surface of a flywheel; and a magneto coil that is disposed in the flywheel being opposed to the magnets and coaxial with the flywheel, and that generates an electr... | 01/23/2007 |
| 7165313 | Method of producing an electric motor An electric motor, in particular a stepper motor, comprises a first rigid component having a recess and a second rigid component having a protrusion. The protrusion is at least partially oversized relative to the recess before assembling the first and second compone... | 01/23/2007 |
| 7166950 | Structure of driving unit in drum type washing machine Structure of driving unit in a drum type washing machine including a tub mounted inside of a cabinet, a drum mounted inside of the tub, a shaft connected to the drum mounted inside of the tub for transmission of a driving force from a motor to the drum, a front bear... | 01/23/2007 |
| 7151334 | Permanent magnet type rotor and method of manufacturing the rotor A permanent magnet type rotor comprises an inner member 2 having an outer ring portion 21; an approximately annular outer member 1 having soft magnetism and an inner circumference contacting with an outer circumference of the outer ring portion;... | 12/19/2006 |
| RE39416 | Structure of rotor for outer rotor type brushless motor The present invention relates to a structure of a rotor for a brushless motor which can improve structural stiffness, restrict noise generation by reducing vibration during the rotation, use cheap materials, reduce a fabrication cost by fabricating a back yoke and a... | 12/05/2006 |
| 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 |
| 7126313 | Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us... | 10/24/2006 |
| 7109627 | Rotor for an electrical machine A rotor for an electrical machine includes a rotor carrier of metallic material with a back wall extending radially to the axis of rotation of the electrical machine and a tubular section extending in the axial direction, in which a laminated core is installed. The ... | 09/19/2006 |
| 7078840 | Brushless rotary electric machine having tandem rotary cores A brushless rotary electric machine includes a stator having an annular armature core with first radial teeth at the outer periphery thereof and second radial teeth at the inner periphery thereof and an armature winding wound between the teeth, a rotor having a pair... | 07/18/2006 |
| 7061153 | High speed motor coils An electric motor may include a plurality of stationary field coils. The field coils are disposed so that they are overlap and are nested with adjacent field coils. A portion of each coil is disposed above a portion of an adjacent coil, and a portion of each coil is... | 06/13/2006 |
| 7053514 | Image apparatus and drive motor A drive motor is proposed, which serves as a drive source for a movement mechanism constituting an iris for an optical path of an imaging system. The drive motor has a shaft serving as a center of rotation, a magnet, two-pole magnetized and rotated around the shaft,... | 05/30/2006 |
| 7026737 | Rotor for an electric machine, especially a synchronous machine, and synchronous machine with a transverse flux The invention relates to a rotor for an electric machine, especially a synchronous machine with transverse flux, especially a synchronous generator, especially a TFM rotor. The invention is characterized by the following features: a support element; a pole structure... | 04/11/2006 |
| 7019422 | Motor with stator made from linear core preform A motor includes a stator having multiple conductors that create a plurality of magnetic fields when electrical current is conducted through the conductors. The stator has a pair of opposing end surfaces in contact with each other forming a toroidal core. A monolith... | 03/28/2006 |
| 7015604 | Stepping motor and method of manufacturing stepping motor A stepping motor includes: a rotary shaft; a rotor magnet mounted fixedly on the rotary shaft; a bearing member including a smaller-diameter portion and a larger-diameter portion, and supporting the rotary shaft; and a yoke including a plurality of magnetic pole tee... | 03/21/2006 |
| 7012349 | Machined rotor assembly and method of making same The present invention provides a single piece machined rotor comprising a shell having an upper lip and a lower lip, with a pocket formed between the upper lip and the lower lip for mounting magnets therein. The magnets are fixed in place within the inner sidewall o... | 03/14/2006 |
