Patents for H02P - Control or regulation of electric motors, generators, or dynamo-electric converters; Controlling transformers or reactors or choke coils (267) |
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01/28/1998 | CN1037221C Inverter control method and apparatus |
12/31/1997 | WO1997049977A1 Model-based fault detection system for electric motors |
11/05/1997 | CN1164144A Method and equipment for controlling converter |
10/29/1997 | CN1163510A Method and apparatus for controlling invertor |
10/30/1996 | CN1134393A Oscillation-damping control of motor torque for mine hoist |
07/31/1996 | CA2168171A1 Oscillation-damping control of motor torque for mine hoist |
07/28/1996 | CA2168168A1 Device for the automatic connection and disconnection of the starting condenser in single-phase asynchronous electric motors |
06/19/1996 | EP0716782A1 Variable speed motor controller |
06/05/1996 | CN1124072A Method and arrangement for controlling an induction motor |
05/15/1996 | EP0711470A1 Method and arrangement for controlling an induction motor |
01/24/1996 | CN1115518A Inverter control method and apparatus |
09/08/1995 | WO1995024073A1 Method and arrangement for controlling an induction motor |
09/08/1995 | CA2161554A1 Method and arrangement for controlling an induction motor |
08/22/1995 | US5444344 System for controlling variable frequency driver for AC motor including selectable speed signals |
08/10/1995 | DE19501375A1 Wechselrichter-Steuerverfahren und -vorrichtung Inverter control method and apparatus |
04/25/1995 | US5410240 Method and device for open-loop control of single-phase or multiphase A.C. power controllers |
03/09/1995 | WO1995006974A1 Variable speed motor controller |
03/09/1995 | CA2170632A1 Variable speed motor controller |
09/27/1994 | US5350988 Digital motor controller |
06/22/1994 | EP0538387B1 Digital motor controller |
04/12/1994 | CA1328498C Method for controlling the torque of a synchronous machine supplied by a frequency converter |
09/08/1993 | EP0458794B1 Process and device for controlling single-phase or multiphase a.c. controllers |
06/02/1993 | CN1021097C Method and arrangement for controlling single-phase or multiphase ac. current resglator |
04/28/1993 | EP0538387A1 Digital motor controller. |
06/16/1992 | CA1303667C Elevator motor control |
05/26/1992 | CA1301542C Electric starter for igniter cord |
01/23/1992 | WO1992001330A1 Digital motor controller |
10/23/1991 | EP0267252B1 Frequency converter for the stabilized supply of asynchronous motors |
09/03/1991 | CA1288465C Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
08/22/1990 | CN1044879A Method and arrangement for controlling single-phase or multiphase ac current regulator |
08/08/1990 | WO1990009701A1 Process and device for controlling single-phase or multiphase a.c. controllers |
06/19/1990 | CA1270518A1 Asynchronous motor regulated supply frequency converter |
04/24/1990 | US4920306 Method for controlling the torque of a synchronous machine supplied by a frequency converter |
04/17/1990 | US4918367 Method for controlling the torque of an ac motor |
02/28/1990 | CN1006975B Control apparatus for an electric railway rehicle |
08/15/1989 | US4857814 Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
04/18/1989 | US4823065 Frequency converter for the stabilized power supply of asynchronous motors |
12/13/1988 | US4791346 Elevator motor control |
05/18/1988 | EP0267252A1 Frequency converter for the stabilized supply of asynchronous motors. |
12/03/1987 | WO1987007455A1 Frequency converter for the stabilized supply of asynchronous motors |
09/01/1987 | CA1226330A1 Method and apparatus for determining the flux vector of a rotating-field machine from the stator current and the stator voltage, and the application thereof |
08/12/1987 | EP0128182B1 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller |
12/03/1986 | CN86102173A Control apparatus for an electric railway vehicle |
04/22/1986 | CA1203565A1 Method and apparatus for controlling the power factor of an induction-motor |
04/08/1986 | US4581568 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller |
03/12/1986 | EP0036424B1 Circuit arrangement for an asynchronous motor drive with variable speed |
02/25/1986 | CA1201159A1 System for supression of underdamped oscillations in a.c. power drawn by synchronous motors driving ward leonard generators |
12/31/1985 | CA1198769A1 Apparatus and methods for controlling induction motors |
05/07/1985 | CA1186726A1 Inverter circuit for operating a speed-controllable asynchronous motor |
02/12/1985 | US4499413 Method and apparatus for the control of synchronous motors |
12/19/1984 | EP0128182A1 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller. |
12/18/1984 | US4489261 Method and means for feeding electric energy to a portable power tool |
10/03/1984 | EP0120365A1 Method and device for controlling a variable speed asynchronous motor fed by a current converter |
06/21/1984 | WO1984002404A1 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller |
04/18/1984 | EP0105855A2 An electric drive system |
04/10/1984 | US4442394 Inverter circuit for operating a speed-controllable asynchronous motor |
12/27/1983 | CA1159514A1 Static var generator with overvoltage protection for the switched capacitors thereof |
05/18/1983 | EP0079169A1 A power controller |
08/17/1982 | US4344514 Electric switch apparatus for automobile power train clutch |
02/05/1982 | EP0036424A4 Circuit arrangement for an asynchronous motor drive with variable speed. |
09/30/1981 | EP0036424A1 Circuit arrangement for an asynchronous motor drive with variable speed. |
07/07/1981 | US4277733 Slip recovery system for wound rotor motor |
04/16/1981 | WO1981001084A1 Circuit arrangement for an asynchronous motor drive of controlled stepping |
03/31/1981 | US4259620 Low cost, variable speed, constant torque induction motor drive |
06/12/1979 | US4158163 Inverter circuit |
08/29/1978 | CA1037557A1 Control of rotary-field electric machines |
06/14/1977 | US4030006 Speed controllable drive for an asynchronous motor |