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| Number | Title | Issue Date |
| 7902783 | Mixed device for controlling power transfer between two cores of a direct current network and supplying an alternating current motor A combined device for instantaneous control of power transfer between two cores of a direct current network and for powering an alternating current engine. The device includes: an assembly of two three-phase inverters, each including three switching cells connected ... | 03/08/2011 |
| 7834574 | Phase current sampling and regulating apparatus and methods, and electric motor drive systems In various embodiments, a phase current sampling apparatus (300, 600, FIGS. 3, 6), an electric motor drive system (100, FIG. 1), and a motor vehicle (1200, FIG. 12) include switching circuitry adapted to receive first and se... | 11/16/2010 |
| 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 |
| 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 |
| 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 |
| 7119473 | Brush card assembly with RFI suppression for two or three speed permanent magnet brush motor with link wound dual commutator and dual armature winding configuration A brush card assembly 30 is provided for a permanent magnet brush motor 50. The motor includes a link wound, high speed side commutator 46 and an associated high speed side armature winding 44, and a link wound low speed side commutator | 10/10/2006 |
| 7105969 | Two speed electric motor with link wound dual-commutator and dual-armature winding A permanent magnet D.C. electric motor includes a stator housing, permanent magnet structure, and an armature assembly. The armature assembly includes a shaft rotatably mounted in the stator housing, lamination structure, first and second coil windings associated wi... | 09/12/2006 |
| 7006761 | Control device for DC motors In order to design as inexpensively as possible a control device for DC motors which are provided with a commutator for feeding their motor windings which has at least four sliding contacts, this device comprising a modulation stage which generates at least one cont... | 02/28/2006 |
| 6965183 | 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... | 11/15/2005 |
| 6759823 | Fail-safe mechanism for dc-drive A brushless d.c. drive including a synchronous motor, including a multiphase armature winding, a switching device controlled by an electronic controller and connected upstream from the armature winding for commutation of the armature winding, and a device for genera... | 07/06/2004 |
| 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 |
| 6242884 | Dual stator winding induction machine drive A dual stator winding induction machine has two windings with input terminals which are supplied separately with drive power. The two stator windings have a different number of poles to essentially eliminate the magnetic coupling between the two windings ... | 06/05/2001 |
| 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 |
| 5786673 | Electric motor A fractional-power electric motor is provided to generate varying amounts of output torque supplied to a driven member over a wide range of RPM speeds so as to reduce power consumption on a battery-powered source. The electric motor includes a rotor and a... | 07/28/1998 |
| 5736829 | High-speed constant-horsepower motor A high-speed constant-horsepower motor includes a rotor and a stator having a plurality of groups of windings which are separately driven. In one mode of operation, the polarity of the voltage applied to each winding is such that the windings behave as di... | 04/07/1998 |
| 5661379 | Electric motor A fractional-power electric motor is provided to generate varying amounts of output torque supplied to a driven member over a wide range of RPM speeds so as to reduce power consumption on a battery-powered source. The electric motor includes a rotor and a... | 08/26/1997 |
| 4454460 | D.C. Rotary machine with interpole compensation The first and second interpole compensation windings are disposed on the commutation starting side and the commutation ending side of the interpole cores, respectively. The current flowing through the first and second interpole compensation windings are c... | 06/12/1984 |
