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| Number | Title | Issue Date |
| 7422089 | Drive unit for an elevator An elevator drive unit including a traction sheave supported by a shaft rotatably supported by a pair of bearings. Mounted on opposite free ends of the shaft are rotors of a pair of electric motors. Cage-housings on a pair of spaced bearing end-plates retain the sta... | 09/09/2008 |
| 7298110 | Integrated motor monitoring system An integrated motor monitoring system includes a housing and a motor disposed within the housing, the motor being configured to provide a power output. The integrated motor monitoring system also includes at least one monitoring device communicatively coupled to the... | 11/20/2007 |
| 7276873 | Fault-handling system for electric power steering system A fault-handling system for a 2-phase motor. When an electric motor is used for power assist in a steering system in a vehicle, malfunctions can cause loss of assist, and detectable vibration. The invention utilizes a 2-phase motor in such an application, and implem... | 10/02/2007 |
| 7183668 | Generator with current and voltage abnormality detection A detecting means easily detects the abnormality of a generator having a plurality of power supply units. Each of the power supply units includes one of a plurality of output windings L1 to L4, which are wound independently of each other around single ... | 02/27/2007 |
| 7015670 | Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member The invention provides a method for controlling an electromechanical servomechanism (20) for moving an output member relative to a variable load (38). The servomechanism includes: a motor (37) having at least one coil (32A, 32B or ... | 03/21/2006 |
| 6888330 | Current controlling method and apparatus for electric rotating machine In method and apparatus for controlling a current of an electrical rotating machine, at least one high-order higher harmonic wave current is superposed on a fundamental wave current, the high-order higher harmonic wave current having current components one phase of ... | 05/03/2005 |
| 6879125 | Control apparatus and method for at least one electrical rotating machine using compound current In control apparatus and method for at least one electrical rotating machine, two rotors are disposed in the electrical rotating machine on the same axis of rotation and being driven independently of each other by means of a generated compound current and are associ... | 04/12/2005 |
| 6437529 | Multi-stator motor with independent stator circuits First and second stator circuitry for respective use with first and second stators in a multi-stator motor are configured so that the first stator circuitry is substantially unaffected by a failure of the second stator circuitry to energize a second windi... | 08/20/2002 |
| 6429554 | Electric motor An electric motor having a stationary annular stator with wound stator poles and a rotatably mounted rotor having annularly distributed permanent magnets or electromagnets of alternate polarity, wherein the stator is composed of a plurality of separate st... | 08/06/2002 |
| 5925999 | Three-speed dual-winding direct current permanent magnet motor method and apparatus A direct current motor having a primary armature winding, a secondary armature winding and a switching circuit adapted to selectively energize the primary winding and the secondary winding to achieve three-speed motor operation is disclosed. The system is... | 07/20/1999 |
| 4091313 | Current recycling electric motor system An electric motor system has a plurality of axially aligned stators and a corresponding plurality of axially aligned rotors, carried on the same shaft and angularly disposed relative one another, and a commutating device for causing an overlap in the ener... | 05/23/1978 |
