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| Number | Title | Issue Date |
| 8148865 | Permanent magnet rotating electrical machine and permanent magnet rotating electrical machine system Movement of magnets due to centrifugal force is restricted. In a permanent magnet rotating electrical machine 100 having a stator 1 and a rotor core 5 provided with a plurality of permanent magnets 3 inserted in an outer circumferential p... | 04/03/2012 |
| 8134267 | Motor including a rotor and a stator, and washing machine using the same The present invention relates to a motor. A motor including a stator and a rotor that is rotatably provided at an outer side in a radial direction of the stator, the rotor comprising: a base part; a side wall part that is integrally formed with the base part and ver... | 03/13/2012 |
| 8110957 | Permanent magnet motor There is provided a permanent magnet motor capable of reducing cogging torque and torque ripple while suppressing a decrease in motor output. In a permanent magnet motor 1 including a rotor 3 in which a plurality of permanent magnets 5 are arran... | 02/07/2012 |
| 8076812 | Rotor having embedded permanent magnet A structure for arranging a permanent magnet suitable for a rotor core having a thin, circular, hollow ring section and a structure for reducing the amount of the permanent magnet are provided. ... | 12/13/2011 |
| 8040009 | Filed element The field magnet is formed of, for example, two permanent magnets, and a width of the field magnet increases from a center toward both ends thereof in a monotonically non-decreasing manner. The field magnet includes, at the both ends thereof, projecting portions pro... | 10/18/2011 |
| 8004139 | Compressor motor and compressor A compressor motor includes a rotor and a stator disposed radially outside of the rotor. The rotor includes a rotor core, and a plurality of magnets circumferentially arranged on the rotor core at center angles of equal intervals. The rotor core has an axial length ... | 08/23/2011 |
| 7999430 | Complementary permanent magnet structure capable of minimizing cogging torque for rotating electric machine A complementary permanent magnet structure capable of minimizing the cogging torque for a rotating electric machine, the complementary permanent magnet structure comprising: a magnetic pole core being cylinder shaped with even numbered arc-shaped magnetic sets posit... | 08/16/2011 |
| 7898137 | Permanent magnet and permanent magnet rotating machine A permanent magnet has a D-shaped cross section including an arcuate top surface (22), a flat bottom surface (24), and side surfaces (26, 28). Provided that a plurality of permanent magnets are circumferentially arranged so that a great circle (... | 03/01/2011 |
| 7884519 | Generator constituted to generate electric power by ring-shaped rotations Provided is a generator in which straight rod magnets have been heated to form curved ones, with the identical polarity ends of the magnets having been forcibly butted together by diamagnetic connecting devices to form a field element ring. The field element ring is... | 02/08/2011 |
| 7839043 | Rotary structure of permanent magnet electric machinery and method for determining the structure thereof A rotary structure of a permanent magnet electric machine including a stator and a rotor is provided. The stator has K salient teeth peripherally spaced with equal intervals for forming K winding slots, wherein K is a natural number greater than 1. The rotor has an ... | 11/23/2010 |
| 7679256 | Rotary electric machine A rotary electric machine capable of effectively utilizing both end faces of a rotor in the rotating axis direction by suppressing magnetic saturation comprises a stator having axial parts (31) and (32) and a radial part. The axial part (31) com... | 03/16/2010 |
| 7612479 | Scanner for equalizing torque constant and reducing torque constant variation A scanner has a rotor, and a stator disposed in the outside of the rotor. The rotor includes a shaft, and a permanent magnet mounted on the outer circumferential side of the shaft. The stator includes a casing, a yoke held in the inner circumferential side of the ca... | 11/03/2009 |
| 7598645 | Stress distributing permanent magnet rotor geometry for electric machines A rotor includes a cylindrical rotor core having an outer circumferential surface and a plurality of magnet insertion holes formed in the rotor core and arranged circumferentially at a preset angular interval about the rotational axis of the rotor core. Each hole ex... | 10/06/2009 |
| 7573170 | Motor modules for linear and rotary motors A motor module, method, apparatus and system for implementing linear and rotary motors, such as relatively large rotary motors, are disclosed. In one embodiment, an electrodynamic machine can include magnets having angled magnetic surfaces and regions of predetermin... | 08/11/2009 |
| 7535146 | Brushless synchronous machine with embedded permanent magnets and trapezoidal electromagnetic force A brushless synchronous machine is energized by permanent magnets with a stator and a rotor. The rotor is supported within the stator to allow rotation. The rotor has a plurality of cutouts into which permanent magnets are embedded. An air gap is provided between th... | 05/19/2009 |
| 7531933 | Permanent magnet rotating machine In a rotating machine comprising a rotor including a rotor core and a plurality of permanent magnet segments, and a stator including a stator core and windings, the permanent magnet segment is obtained by disposing a powder comprising an R2 oxide, R3... | 05/12/2009 |
| 7508106 | Magnetoelectric generator In a magnetoelectric generator generating electric power by electromagnetic induction between permanent magnets and a generating coil due to rotation of a flywheel, a plurality of press-worked portions for forcibly increasing roundness of the flywheel are formed by ... | 03/24/2009 |
| 7425785 | Permanent magnet motor In a permanent magnet motor consisting of a rotor 1, which is supported on a rotating shaft 2 and has twelve permanent magnets 3 arranged at fixed intervals in the circumferential direction in the peripheral edge portion thereof, and a stator | 09/16/2008 |
| 7417347 | Skeleton type BLDC motor A rotor of a BLDC motor includes: a rotor divided into a north pole and a south pole on the basis of a magnetic pole separating line; and a stator at which the rotor is disposed with an air gap, the stator having a first pole shoe, a second pole shoe and a pair of d... | 08/26/2008 |
| 7411329 | Permanent magnet synchronous motor including permanent magnet with tapered outer edges and rotor core with opening The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg | 08/12/2008 |
| 7345399 | Motor for a fuel pump An electrically commutated motor for a fuel pump having a rotor connected to a shaft and having plastic-bonded ferrite, with a fuel-resistant shaped body formed by the plastic-bonded ferrite, and a magnetic return element adjustable in relation to the shaped body. | 03/18/2008 |
| 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 |
| 7294948 | Rotor-stator structure for electrodynamic machines A rotor-stator structure for electrodynamic machinery is disclosed to, among other things, minimize magnetic flux path lengths and to eliminate back-iron for increasing torque and/or efficiency per unit size (or unit weight) and for reducing manufacturing costs. In ... | 11/13/2007 |
| 7247964 | Electrical machine with magnetized rotor An electrical machine comprises a stator and a rotor. The rotor is adapted to magnetically interact with the stator to promote rotation of the rotor about an axis. The rotor includes a rotor core and a plurality of magnetized arcs supported by the rotor core. The pl... | 07/24/2007 |
| 7234482 | Servovalve with torque motor The servovalve with torque motor consists of a cylindrical case (3) in which an armature (1) is arranged on one end of an arm (16) and a orifice (18) closing a nozzle (19) with working liquid (2) on the other side of the arm... | 06/26/2007 |
| 7230360 | Switched reluctance machine A switched reluctance machine (SRM) having a rotor and stator pole numerical relationship of S number of stator poles and R number of rotor poles, where R=2S−2, when S is greater than 4; provides improved power density, torque production, torque ripple, and acoust... | 06/12/2007 |
| 7218017 | System and method to control a rotary-linear actuator A system and method are disclosed for controlling an integrated rotary-linear actuator system that may be coupled to a network via a network interface. The integrated rotary-linear actuator system includes a control system and a rotary-linear actuator having a movea... | 05/15/2007 |
| 7204012 | Method for fabricating a rotor arrangement and a rotor arrangement for an electric machine A method for fabricating a rotor arrangement for an electric machine in which a rotor body is provided and permanent magnets made from an isotropic magnetic material are embedded in the rotor body, the permanent magnets being magnetized by an external magnetizing de... | 04/17/2007 |
| 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 |
| 7190097 | Cross plane wide-gap motor system for gimbal An apparatus for the control and alignment of a sensor on a moving vehicle is provided that includes a gimbal ball supported by an outer axis structure and adapted to pivot about an outer elevation axis and about an outer azimuth axis. The outer axis structure is mo... | 03/13/2007 |
| 7187092 | Thin inner rotor motor for rotatably driving medium, and disk apparatus using the same An inner rotor motor includes a rotor having a plurality of magnetic poles circumferentially arranged, and a stator with a stator core having a plurality of magnetic pole teeth that are positioned on the outer side of the circumference of the rotor and oppose the ro... | 03/06/2007 |
| 7183684 | Permanent magnet rotary motor A permanent magnet rotary motor that can maintain higher torque density and reduce cogging torque more greatly than a conventional permanent magnet rotary motor. A pair of end surfaces of each of permanent magnets used for a rotor are substantially parallel to a vir... | 02/27/2007 |
| 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 |
| 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 |
| 7146708 | Method of making a composite electric machine rotor assembly A method of making composite electric machine rotor assembly of a desired magnetic pattern. Magnetic segments and non-magnetic segments are separately formed to green strength, and then arranged adjacent to each other in a desired magnetic pattern. A small amount of... | 12/12/2006 |
| 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 |
| 7112910 | Brushless DC electric motor An electric motor comprises a housing, a magnetic rotor and a stator which comprises at least one circuit board. The magnetic rotor comprises a disk with circumferentially arrayed magnetic poles. The circuit board on each side comprises one layer of circumferentiall... | 09/26/2006 |
| 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 |
| 7102258 | Manual electric generating device The present invention discloses a manual electric generating device, which comprises an upper casing, a lower casing; a rotor, a fixed stand, a hollow cylinder, a coil for generating power supply; and a printed circuit board for processing and outputting the power s... | 09/05/2006 |
