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| Number | Title | Issue Date |
| 7268505 | Electric machine and method of operating the electric machine A method of and apparatus for controlling an electric machine. The method can include using a controller to detect whether power is present at a first node of the controller, detect whether power is present at a second node of the controller, generate at least one s... | 09/11/2007 |
| 7218075 | Electronic circuit for starting a single phase induction motor An electronic circuit for starting a single phase induction motor, of the type containing a rotor and a stator with at least one running coil (B1) and one starting coil (B2), for operating jointly with an alternating current source (F), comprising: a t... | 05/15/2007 |
| 7078826 | Hybrid gas turbine engine starter-generator A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a DC motor mode or an AC generator mode. The machine includes a conventionally wound main stator that is selectively configurable as a multi-pole AC stator and a mul... | 07/18/2006 |
| 6979979 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 12/27/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6891294 | Electric motor vehicle comprising same An electric motor for a motor vehicle or other machine. The motor includes a support member with electromagnets (coils) and a moving member with permanent magnets. The coils are divided into groups, each group having several sets of coils, each set having several co... | 05/10/2005 |
| 6815926 | Single phase induction motor with partially shared windings A single phase, three-speed induction motor having 4, 6, and 8-pole speed configurations. In one embodiment, the motor is constructed and arranged to be used in connection with a washing machine. The 8-pole speed winding shares a portion of the 4-pole speed winding,... | 11/09/2004 |
| 6271639 | Capacitor start single phase induction motor with partial winding starting A motor includes a stator core, a rotor in rotational relationship with the stator core and a main winding on the core. In one form, the main winding includes a 4-pole configuration and an 8-pole configuration and the motor has a 4-pole auxiliary winding ... | 08/07/2001 |
| 6175209 | 2/4-pole PSC motor with shared main winding and shared auxiliary winding A motor comprising a 2/4-pole permanent-split capacitor motor having a shared main winding and a shared auxiliary winding. The shared auxiliary winding comprises a 4-pole auxiliary winding phase shifted one slot less than a phase shift of 90 degrees with ... | 01/16/2001 |
| 5760567 | Induced voltage reduction method and an induced voltage reduction apparatus for an induction motor A method and apparatus for controlling an induction motor having at least high speed windings and reduced speed windings divides the reduced speed windings into first and second portions. The first and second portions of the reduced speed windings are ele... | 06/02/1998 |
| 5170110 | Regulator mechanism for a two-speed motor An improved regulator mechanism for a single-phase or three-phase, two-speed motor is disclosed. The regulator mechanism includes a first energizable contactor (having at least one contact) and a second energizable contactor (having five contacts) which c... | 12/08/1992 |
| 5103153 | Control equipment for multi-speed electric motors Control equipment for motors having two windings and wherein both windings are temporarily connected in parallel to start the motor.... | 04/07/1992 |
| 5075611 | Single phase AC motor control device A control device is provided for an alternating current motor operating in single phase and having first and second windings coupled so that they are shifted in phase with respect to each other. A control unit includes first and second switching elements ... | 12/24/1991 |
| 4947098 | Regulator mechanism for a two-speed motor An improved regulator mechanism for a single-phase or three-phase, two-speed motor is disclosed. The regulator mechanism includes a first energizable contactor (having at least one contact) and a second energizable contactor (having five contacts) which c... | 08/07/1990 |
| 4841188 | Speed changing device for electric fans A speed-changing device for electric ceiling fans includes a run coil for electrical connection to a motor of a ceiling fan, and a starting and speed changing coil, together with a starting capacitor, parallel-connected to the coil. The starting and speed... | 06/20/1989 |
| 4823067 | Energy conserving electric induction motor control method and apparatus Power consumed by an ordinary a.c. induction motor is reduced by having two parallel sets of separately excited RUN windings. When the motor is lightly loaded, a.c. power feeds only one of the two RUN windings, thereby reducing the flux density in the mot... | 04/18/1989 |
| 4438381 | Synchronous motor system A stepping motor with toothed stator poles and two sets of oppositely magnetized rotor teeth has its stator poles energized by a driver which responds to input pulses to successively deenergize alternate poles and keep them deenergized and then successive... | 03/20/1984 |
| 4296344 | Multi-speed motor The efficiency of a multi-speed motor is optimized for the speed at which the motor is to be most frequently operated by first predetermining the expected most frequently used motor speed and then forming a start winding having a number of starting poles ... | 10/20/1981 |
| 4145645 | Speed control means for squirrel-cage motor There is disclosed a squirrel-cage motor for a winch drive or other application and control means for operating the motor in hoist or lower directions at any one of a plurality of speeds in either direction. The motor and winch are provided with a load br... | 03/20/1979 |
