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| Number | Title | Issue Date |
| 7525229 | Hysteresis-start permanent magnet motor A hysteresis-start permanent magnet rotor having a non-magnetic rotor shaft, a permanent magnet rigidly attached to a center portion of the non-magnetic rotor shaft, a non-magnetic spacer on each side of the permanent magnet, each non-magnetic spacer rigidly attache... | 04/28/2009 |
| 7348754 | Motion control using electromagnetic forces An apparatus has (a) a first component having one or more electromagnetic elements and (b) a second component having one or more electromagnetic elements and movably coupled to the first component. The second component moves with respect to the first component in a ... | 03/25/2008 |
| 7170207 | Motpor device capable of reducing cogging torque A motor device capable of reducing cogging torque includes a stator assembly and a rotor assembly, which is movably disposed in the stator assembly. The rotor assembly provides a magnetic component. The stator assembly further includes an insulation frame part, a se... | 01/30/2007 |
| 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 |
| 6805081 | Valve timing control device for internal combustion engine A valve timing control device for an internal combustion engine, comprises a drive rotary member rotated by a crankshaft of the engine, a driven rotary member to rotate a camshaft of the engine upon rotation of the drive rotary member; a rotational phase control mec... | 10/19/2004 |
| 6657348 | Rotor shield for magnetic rotary machine A magnet machine includes a magnet rotor. The rotor includes a sleeve and a magnet. The magnet is positioned within the sleeve. A highly electrically conductive, nonmagnetic shield surrounds the magnet. The shield reduces rotor eddy current losses and low... | 12/02/2003 |
| 5187401 | Combination hysteresis-reluctance-permanent-magnet motor An improved electric motor has a stator, and a hysteresis cylindrical ring formed of magnetic metallic material disposed within the stator cylindrical core with an annular air space between the hysteresis cylindrical ring and the stator core, and a rotor ... | 02/16/1993 |
| 4433260 | Hysteresis synchronous motor utilizing polarized rotor A hysteresis synchronous motor in which a rotor includes arcuate permanent magnets mounted adjacent to the hysteresis ring material. Permanent magnetic poles are induced in the ring material by the rotating electromagnetic stator field. After start-up, th... | 02/21/1984 |
| 4137473 | Electrical drive device An electrical drive device comprising a stator arrangement of the claw pole type surrounding a stator chamber or compartment and producing therein at least one magnetic field containing at least one rotary field component. There is provided a permanent ma... | 01/30/1979 |
