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Class Information
Number: 318/772
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Plural speed
Description: Subject matter wherein the primary member comprises a plurality of windings or winding portions and the circuit includes means connected to the windings or winding portions to cause the motor to rotate at several nominal discrete speeds.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7579804 |
Method to measure the angular speed of an induction motor |
Aug. 25, 2009 |
| 7521882 |
Control device and method of motor |
Apr. 21, 2009 |
| 7474074 |
Variable speed induction motor with wye-delta switching with reduced drive volt-amp requirement |
Jan. 6, 2009 |
| 7446500 |
Method for operating a programmable washing machine |
Nov. 4, 2008 |
| 7420351 |
Power-factor correction device for variable speed drive |
Sep. 2, 2008 |
| 7408320 |
Apparatus for power control by phase gating and a method for harmonic reduction |
Aug. 5, 2008 |
| 7382103 |
Magnetic gearing of permanent magnet brushless motors |
Jun. 3, 2008 |
| 7279864 |
Control unit for driving a regulating transistor of a fan arrangement |
Oct. 9, 2007 |
| 7271565 |
Apparatus for controlling speed of fan motor of air-conditioner |
Sep. 18, 2007 |
| 7239109 |
Single-phase induction motor |
Jul. 3, 2007 |
| 7202627 |
Load and speed sensitive motor starting circuit and method |
Apr. 10, 2007 |
| 7196490 |
Variable speed motor |
Mar. 27, 2007 |
| 7138772 |
Electrically movable vehicle and control program for driving electrically movable vehicle |
Nov. 21, 2006 |
| 7095209 |
Method and apparatus to regulate torque provided to loads |
Aug. 22, 2006 |
| 7091691 |
Variable speed motor |
Aug. 15, 2006 |
| 7075255 |
Variable speed controller for a family of multi-tap motors |
Jul. 11, 2006 |
| 7045979 |
Multiple-speed electric machine and method of operating the same |
May. 16, 2006 |
| 7034500 |
Electric drive assembly |
Apr. 25, 2006 |
| 6997002 |
Air conditioning unit and method of operating the same |
Feb. 14, 2006 |
| 6946815 |
Switch for a variable-speed induction motor |
Sep. 20, 2005 |
| 6900614 |
Rotation speed search apparatus for increasing an output voltage of an inverter and method thereof |
May. 31, 2005 |
| 6864659 |
Variable speed controller for air moving applications using an AC induction motor |
Mar. 8, 2005 |
| 6815926 |
Single phase induction motor with partially shared windings |
Nov. 9, 2004 |
| 6815925 |
Systems and methods for electric motor control |
Nov. 9, 2004 |
| 6806677 |
Automatic control switch for an electric motor |
Oct. 19, 2004 |
| 6801007 |
Electrically-operated actuator system |
Oct. 5, 2004 |
| 6798160 |
Electric working machine |
Sep. 28, 2004 |
| 6788022 |
Electric motor |
Sep. 7, 2004 |
| 6741061 |
Efficient stator |
May. 25, 2004 |
| 6456033 |
Pole change induction motor |
Sep. 24, 2002 |
| 6369544 |
Furnace and air conditioner blower motor speed control |
Apr. 9, 2002 |
| 6346790 |
Induction motor system with an induction motor and an electrically isolated voltage modulation motor controller |
Feb. 12, 2002 |
| 6329783 |
Apparatus for continuously variable speed electric motor applications |
Dec. 11, 2001 |
| 6304046 |
Driving control circuit of a hood motor |
Oct. 16, 2001 |
| 6288516 |
Food processor motor controller |
Sep. 11, 2001 |
| 6255755 |
Single phase three speed motor with shared windings |
Jul. 3, 2001 |
| 6175208 |
High efficiency permanent split capacitor motor for driving a compressor |
Jan. 16, 2001 |
| 6172476 |
Two step power output motor and associated HVAC systems and methods |
Jan. 9, 2001 |
| 6121746 |
Speed reduction switch |
Sep. 19, 2000 |
| 6111377 |
Control device for a multiphase electric motor |
Aug. 29, 2000 |
| 6037725 |
Two step power output motor |
Mar. 14, 2000 |
| 5990653 |
Method for controlling the speed of a single-phase asynchronous induction motor |
Nov. 23, 1999 |
| 5932981 |
Apparatus and method for reduced voltage controller |
Aug. 3, 1999 |
| 5892349 |
Control circuit for two speed motors |
Apr. 6, 1999 |
| 5883490 |
Electric motor controller and method |
Mar. 16, 1999 |
| 5883488 |
Method and apparatus for multispeed hybrid start switch for a motor |
Mar. 16, 1999 |
| 5867005 |
AC motor winding circuit |
Feb. 2, 1999 |
| 5841358 |
Motor current status sensor |
Nov. 24, 1998 |
| 5818195 |
Dual state controller for brushless electric motors |
Oct. 6, 1998 |
| 5818187 |
Motor and control for windshield wiper system |
Oct. 6, 1998 |
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