| Patents for H02P 27 - Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage (13,284) |
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| 10/04/1989 | EP0335269A1 Magnetic flux operation method for induction motor |
| 10/04/1989 | EP0335180A1 Load angle control device for a power converter |
| 10/04/1989 | CN1036110A Method and apparatus for controlling voltage type convertor by p.w.m. |
| 09/27/1989 | EP0334112A1 Pulse converter driven induction machine |
| 09/26/1989 | US4870556 Method and apparatus for controlling power converter |
| 09/26/1989 | US4870338 Load commutated inverter (LCI) induction motor drive |
| 09/26/1989 | US4870334 Motor control apparatus |
| 09/26/1989 | CA1260533A1 Control for bumpless transfer of an ac motor between solid state inverter and a supply means |
| 09/26/1989 | CA1260532A1 Static phase conversion circuits for three-phase motors |
| 09/26/1989 | CA1260056A1 Current sense demodulator |
| 09/21/1989 | WO1989008944A1 Thyristor d.c.-a.c. converter with impressed direct current for impressing a load current |
| 09/20/1989 | EP0333054A1 Control system for controlling revolution speed of electric motor |
| 09/20/1989 | EP0332974A1 Short circuit protection for a pulse converter powered electric machine operated both motorically and generatingly |
| 09/20/1989 | EP0332973A1 Pulse converter-operated electric machine |
| 09/19/1989 | EP0314669A4 Switched capacitor induction motor drive. |
| 09/19/1989 | CA1259654A1 Control system for a power converter driving a synchronous motor |
| 09/08/1989 | WO1989008349A1 Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus and power supply means for such electronic power switching apparatus |
| 09/05/1989 | US4864212 Energy economizing AC power system |
| 08/30/1989 | EP0330477A2 Induction motor control system |
| 08/30/1989 | EP0330188A1 Induction motor vector control |
| 08/30/1989 | EP0329926A1 Overload protection for electric motors |
| 08/29/1989 | US4862343 Induction motor control apparatus |
| 08/22/1989 | US4859924 Inverter |
| 08/22/1989 | US4859917 Speed control device for an electric sewing machine |
| 08/15/1989 | US4858100 Electric power converter |
| 08/15/1989 | US4857819 Connection of static inverter to a running motor |
| 08/15/1989 | US4857814 Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
| 08/10/1989 | WO1989007364A1 Speed controller |
| 08/08/1989 | US4855661 Motion control apparatus for induction motor |
| 08/02/1989 | EP0326333A2 Variable speed ac drive |
| 08/02/1989 | EP0325982A1 Forming method for the actual value of the load angle of a field-orientated controlled induction machine, and control thereof |
| 07/26/1989 | EP0324806A1 Switch arrangement for controlling motors |
| 07/25/1989 | US4851982 Apparatus for controlling an A.C. powered elevator |
| 07/18/1989 | US4849950 Device for reducing the leakage noise of a power converter |
| 07/18/1989 | US4849871 Three-phase PWM inverter with speed control and load compensation for an induction motor |
| 07/18/1989 | US4849651 Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus and power supply means for such electronic power switching apparatus |
| 07/11/1989 | US4847744 Voltage converter apparatus |
| 06/27/1989 | US4843297 Microprocessor speed controller |
| 06/27/1989 | US4843288 Phase locked motor control system for multiple disk drive units |
| 06/15/1989 | WO1989005539A1 Driving motor |
| 05/31/1989 | EP0317869A1 Method of simulating the actual value of a load angle of an induction machine, and circuit arrangement for carrying out this method |
| 05/23/1989 | US4833586 PWM control for power converter system utilizing pulse dropping at minimum pulse widths |
| 05/23/1989 | US4832133 Tightening system and a method of tightening |
| 05/23/1989 | CA1254612A1 Induction motor control system |
| 05/10/1989 | EP0314882A1 Digital slip frequency generator and method for determining the desired slip frequency |
| 05/10/1989 | EP0314812A1 Alternating current motor control system with emergency control. |
| 05/10/1989 | EP0314669A1 Switched capacitor induction motor drive. |
| 05/03/1989 | EP0313929A1 Method to avoid current drop in a strand, not involved in commutation of a three phase synchronous machine with current block supply and circuit to execute the method |
| 05/03/1989 | EP0313671A1 Temperature compensative revolution speed control for an induction motor. |
| 05/02/1989 | US4827203 Rotor rotational position detector for a motor |
| 04/25/1989 | US4825131 Control system for induction motor driven electric car |
| 04/18/1989 | US4823251 Controller for instantaneous output current and/or voltage of 3-phase converter |
| 04/18/1989 | US4823068 Cross tie for induction motor drive |
| 04/18/1989 | US4823066 Three-phase induction motor control method |
| 04/18/1989 | US4823065 Frequency converter for the stabilized power supply of asynchronous motors |
| 04/18/1989 | US4823057 Variable speed motor control |
| 04/12/1989 | EP0311031A2 A method and an electric circuit for controlling an AC-motor, and a circulation pump driven by a motor controlled in this manner |
| 04/11/1989 | CA1252507A1 Control system of an ac motor |
| 04/06/1989 | DE3731469A1 Electric-motor control drive |
| 04/05/1989 | EP0168502B1 Reel tension controlling method and apparatus |
| 04/04/1989 | US4819179 Digital slip frequency generator and method for determining the desired slip frequency |
| 04/04/1989 | US4818927 Acceleration/deceleration control apparatus using slip speed |
| 03/29/1989 | EP0308621A2 Power system stabilizer |
| 03/28/1989 | US4816985 Apparatus for controlling an alternating current power supply |
| 03/28/1989 | US4815567 Apparatus for controlling an A.C. powered elevator |
| 03/21/1989 | US4814964 Variable speed a-c drive |
| 03/21/1989 | US4814683 Induction motor control apparatus |
| 03/08/1989 | CN1031631A Method of controling electric motor for air-blower of air conditioner |
| 03/07/1989 | US4811189 AC rectifier circuit with means for limiting the rectified voltage |
| 03/07/1989 | US4810943 Method and apparatus for controlling air-conditioning apparatus |
| 02/28/1989 | CA1250617A1 Energy economizer controlled-current start and protection for induction motors |
| 02/21/1989 | CA1250346A1 Speed control circuit for ac motor |
| 02/14/1989 | US4804902 Linear, low EMI/RFE fan control circuit |
| 02/14/1989 | US4804900 Control apparatus for synchronous motors |
| 02/14/1989 | US4804067 Inverter control apparatus for elevator motor |
| 01/31/1989 | US4802077 PWM inverter controller |
| 01/24/1989 | US4800478 Method and apparatus for controlling PWM inverter |
| 01/24/1989 | US4800327 Three-phase induction motor control method |
| 01/18/1989 | CN1030391A Control apparatus of ac elevator |
| 01/17/1989 | US4799139 Voltage regulation for three-phase inverters |
| 01/12/1989 | WO1989000307A1 Switch arrangement for controlling motors |
| 01/11/1989 | EP0298290A1 Method and device for running an induction machine |
| 01/04/1989 | EP0297472A1 Drive circuit for motors |
| 12/28/1988 | EP0296841A2 Cross tie for induction motor drive |
| 12/28/1988 | EP0296840A2 Method and apparatus for induction motor drive |
| 12/28/1988 | CN88103400A Inverter control apparatus |
| 12/22/1988 | DE3820125A1 Method for controlling an electric motor |
| 12/22/1988 | DE3818975A1 Method and device for controlling a lifting motor |
| 12/20/1988 | US4792742 Control apparatus for an inverter with self-adjustment function of control constants |
| 12/20/1988 | US4792741 Control unit for non-circulating current type cycloconverter |
| 12/14/1988 | CN88103301A Control apparatus for pwm-controlled, variable voltage/variable frequency inverters |
| 12/13/1988 | US4791346 Elevator motor control |
| 12/13/1988 | US4791340 Induction motor drive arrangement |
| 12/07/1988 | EP0293915A2 Inverter control apparatus |
| 12/07/1988 | EP0293844A2 A control apparatus for PWM-controlled, variable voltage/variable frequency inverters |
| 12/07/1988 | CN88103048A Control apparatus for induction motor |
| 12/01/1988 | WO1988009584A1 Alternating current motor control system with emergency control |
| 11/30/1988 | CN88102930A Control apparatus for alternating current lift |
| 11/29/1988 | US4788485 Apparatus for controlling electric motor |
| 11/29/1988 | US4788478 Speed control system for DC motor |