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| Number | Title | Issue Date |
| 8076811 | Flux-switching magnetic motor/generator machine A flux-switching magnetic machine is provided having a drive element and a driven element. The drive element is configured to generate a composite magnetic field comprising a fixed component and a variable component, the fixed component being generated by spaced fix... | 12/13/2011 |
| 8008824 | Electric motor An electric motor (1) has a stator (3), a rotor (2) and a number of permanent magnets (6). The use of permanent magnets (6) having a cuboidal shape, without impairing performance. The stator (3) has a number of permanent mag... | 08/30/2011 |
| 8008823 | Electric machinery of magnetic pole or magnetic circuit wrapped PM magnetic pole An electric machinery provided with a PM magnetic pole wrapped by a permeable polar face and a magnetic circuit from an individual magnetic pole provides an innovative design of having disposed the PM magnetic pole wrapped between the permeable polar face and the ma... | 08/30/2011 |
| 7368843 | Commutator motor A commutator motor includes a stator and a rotor, and the stator includes a stator yoke and a field magnet. The field magnet is fixed onto the inner peripheral surface of the substantially cylindrical stator yoke. The stator yoke is configured by coaxially stacking ... | 05/06/2008 |
| 7271565 | Apparatus for controlling speed of fan motor of air-conditioner An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed con... | 09/18/2007 |
| 7262526 | Rotor for permanent magnet motor of outer rotor type A rotor for a permanent magnet motor of an outer rotor type having a plurality of permanent magnets and disposed around a stator includes a frame, an annular iron core combined integrally with the frame, and a plurality of insertion holes formed in the core so that ... | 08/28/2007 |
| 7259493 | Stator of two rotor single stator type electric motor A stator for a two rotor single stator type electric motor is described. The electric motor has inner and outer rotors that are rotated independently within and around a stator upon application of current to the stator. The stator comprises a stator core including a... | 08/21/2007 |
| 7250734 | High performance switched reluctance machine Certain exemplary embodiments can provide a switched reluctance machine, comprising a rotor; and a stator encircling said rotor and comprising a plurality of radially distributed stator poles, each of said stator poles comprising a set of coils, each set of coils co... | 07/31/2007 |
| 7102262 | Anchoring system for injection molded magnets on a flux ring or motor housing A power tool includes a flux ring with an annular member. At least one molded magnet is received on the annular member. An anchor is on the annular member to retain the at least one magnet on the annular member. The anchor is unitarily formed with the annular member... | 09/05/2006 |
| 7064467 | Commutator motor A commutator motor includes a stator and a rotor, and the stator includes a stator yoke and a field magnet. The field magnet is fixed onto the inner peripheral surface of the substantially cylindrical stator yoke. The stator yoke is configured by coaxially stacking ... | 06/20/2006 |
| 7057314 | Electromagnetic motor system capable of removing heat away from its magnetic gap An electromagnetic drive motor assembly (EDMA) has at least one bridge that extends along a radial direction to conduct heat away from the magnetic gap and towards the outer surface of the EDMA. The EDMA includes a conductive ring between a first plate and a second ... | 06/06/2006 |
| 7012350 | Segmented stator switched reluctance machine A switched reluctance machine includes a stator with a plurality of circumferentially-spaced stator segment assemblies that include salient stator poles and inter-polar stator slots. Each of the stator segment assemblies includes a stack of stator plates forming a s... | 03/14/2006 |
| 7012345 | Electromagnetic motor with flux stabilization ring, saturation tips, and radiator The present invention provides an electromagnetic drive motor assembly (EDMA) that has an inner flux return assembly formed from an upper pole piece and a lower pole piece oppositely disposed relative to each other along the center of the EDMA. An annularly position... | 03/14/2006 |
| 6975057 | Rotary electric machine having a stator made up of sectors assembled together The invention relates to a rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors. The magnetic circuit is made up of an assembly of sectors defin... | 12/13/2005 |
| 6958562 | Motor stator and heat sink system A plurality of similarly configured plates have an essentially circular exterior peripheral ring and an essentially circular interior opening with a plurality of radial legs extending inwardly from the ring with an exterior diameter. A plurality of similarly configu... | 10/25/2005 |
| 6940238 | Single coil, direct current permanent magnet brushless motor with voltage boost A single coil, direct current permanent magnet brushless motor including a stator including six alternately-wound coils connected into a single coil having first and second ends, the oppositely-wound coils forming stator poles, and six magnets of alternating polarit... | 09/06/2005 |
| 6936945 | Permanent magnet synchronous motor A structure of a rotor used in a synchronous motor employing both of permanent magnets and a stator using concentrated windings is disclosed. Slits (13) provided in a section of a rotor laminated in a direction of a rotary shaft are shaped like an arc or a bo... | 08/30/2005 |
| 6891297 | Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet formed body at an outer periphery side thereof for the opening portion ... | 05/10/2005 |
| 6812608 | Direct current motor having field magnets formed by injection molding synthetic resin, with which magnetic particles are mixed, to the inner periphery of the stator core Field magnets are attached to an inner periphery of a stator core, which defines a rotor through hole. The stator core has a plurality of recesses open to the rotor through hole. Each recess faces magnet end portions of the field magnets. The recess surface of the r... | 11/02/2004 |
| 6777842 | Doubly salient machine with permanent magnets in stator teeth Permanent magnet machines including doubly salient machines having one or more permanent magnets located at least partly and preferably entirely within the stator teeth, thereby avoiding weakening of the stator structure while reducing acoustic noise. The magnets ma... | 08/17/2004 |
| 6731033 | Motor-driven system with stator provided with inductors There is provided a motor-driven system which realizes an optimum driving mode for an electric automobile, a robot carrier car, a drum of a copying machine, etc., and a motor-driven system having a function as an optimum actuator for such driving. In a rotational el... | 05/04/2004 |
| 6724114 | Doubly salient machine with angled permanent magnets in stator teeth Permanent magnet machines including doubly salient machines having one or more permanent magnets located at least partly and preferably entirely within the stator teeth, thereby avoiding weakening of the stator structure while reducing acoustic noise. The magnets ma... | 04/20/2004 |
| 6707209 | Reduced cogging torque permanent magnet electric machine with rotor having offset sections A permanent magnet electric machine with reduced cogging torque includes a plurality of axial rotor sections that are defined on a radially outer surface of a rotor. The axial rotor sections include a set of permanent magnets that are in an unmagnetized state and th... | 03/16/2004 |
| 5920139 | Magnet motor stator A magnet motor stator where a magnet of a pole of a stator includes multiple magnets. Each magnet can be flat and made from rare-earth materials. It is thus possible to manufacture these magnet motor stators at a lower cost accompanied by a reduction in s... | 07/06/1999 |
| 5672925 | Doubly salient variable reluctance machine with stationary permanent magnets or auxiliary field windings A new class of doubly-salient machines which incorporates a specific stator/rotor pole arrangement to provide a linearly increasing flux linkage over the entire area of pole overlap, and either (1) stationary permanent magnets mounted in the stator, or (2... | 09/30/1997 |
| 4970423 | Stepper motor with a rotor teeth sensor A stepping motor having a non-touch rotation sensor includes rotor core 5 having magnetic pole teeth of a uniform angular pitch, a stator core 1 having plural magnetic pole teeth groups having magnetic pole teeth of the same angular pitch as the rotor cor... | 11/13/1990 |
| 4516046 | Continuous current electric machine with cylindrical air gap and permanent magnet pole piece A continuous current electric machine with a cylindrical air gap and with permanent magnet stator excitation in which stacked sheets forming the stator of the continuous current machine have closed cut-outs of a polygonal contour extending therethrough su... | 05/07/1985 |
| 4514654 | Small size electric motor A small-size electromotor includes a stator and a rotor enclosed by a housing. In order to reduce weight and moment of inertia of the rotor and stator in the electric motor the rotor and the stator are formed of magnetic conductors assembled from iron she... | 04/30/1985 |
| 4383192 | Electromechanical actuator An improved permanent magnet DC motor designed to accurately support inner pole pieces between end bells to obviate the need for grinding the bore of the stator assembly, magnets and outer magnet pieces being sequentially attached to the inner poles, and ... | 05/10/1983 |
| 4371799 | Permanent magnet field pole for a direct current dynamoelectric machine A direct current dynamoelectric machine characterized by having a plurality of salient field poles each comprising a rigid laminated base member, a relatively more flexible laminated face member, and a plurality of permanent magnet sub-assemblies mounted ... | 02/01/1983 |
| 4150312 | Permanent magnet stator D.C. dynamoelectric machine A disclosed process includes arranging field yoke segments, pole face segments, and one or more pieces of ceramic magnet material so that the yoke segments and pole face segments can be relied upon to establish low reluctance paths for magnetic flux assoc... | 04/17/1979 |
| 4141137 | Method of making a permanent magnet field pole for a direct current dynamoelectric machine In the method of the invention a permanent magnet field pole is manufactured by welding a plurality of preformed base member laminae to thereby form a rigid pole base member. A plurality of preformed face member laminae are secured together by rods extend... | 02/27/1979 |
| 3999107 | Self-starting synchronous motor An electro-magnetic synchronous motor has an E-shaped stator linear or partially wrapped around an axis, the legs being the pole shoes. The middle leg includes a permanent magnet and one or both outer legs have coils. A movable displacement element has po... | 12/21/1976 |
| 3979616 | Unipolar rotary step motor A unipolar rotary step motor having a polarized rotor which turns step-by-step in response to the magnetic field of a control coil as the coil is periodically pulsed by spaced unidirectional current pulses. The magnetic circuit includes, in addition to a ... | 09/07/1976 |
| 3932929 | Method of making a sectioned stator for a dynamoelectric machine A method of manufacturing rotating electric machines comprising a stator and a rotor consisting of the steps of forming the stator in at least two sections by permanently moulding in a plastic mass at least the means providing the magnetic flux, positioni... | 01/20/1976 |
