| 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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| 06/16/1992 | CA1303667C Elevator motor control |
| 06/11/1992 | DE4038981A1 Frequency changer for AC crane motors - uses equivalent circuit data to compute torque and to avoid approaching pull=out torque |
| 06/09/1992 | US5121043 PWM control in the pulse dropping region |
| 06/03/1992 | EP0488240A1 Inverter apparatus provided with electric discharge control circuit of DC smoothing capacitor and method of controlling the same |
| 06/03/1992 | EP0488201A1 Large capacity variable speed driving system for AC electric motor |
| 06/03/1992 | EP0447405A4 Control system for a motor |
| 06/02/1992 | US5119071 Method and apparatus for controlling induction motor for compressor |
| 06/02/1992 | US5119007 Inverter control apparatus |
| 06/02/1992 | CA1302485C Polyphase machine fed by a pulse-controlled a.c. converter |
| 06/02/1992 | CA1302483C Current control for microprocessor motor drive |
| 06/02/1992 | CA1302482C Short-circuit protection device for an electrical machine fed by a pulse-controlled a.c. converter |
| 05/26/1992 | CA1301830C Open loop motor control with both voltage and current regulation |
| 05/19/1992 | CA1301246C Alternating voltage-fed rectifier circuit |
| 05/13/1992 | CN1016658B Method and apparatus for controlling ac current resulator of singl-phase or polyphase |
| 05/07/1992 | DE4034520A1 Three=phase current regulator for variable speed drive - provides direct regulation of electrical output parameter using detected phase components |
| 05/06/1992 | EP0483852A2 Power source circuit |
| 04/30/1992 | WO1992007130A1 Process for determining the load of an asynchronous motor fed via a frequency converter and a device for carrying out the process |
| 04/22/1992 | EP0481495A2 Port output controller for use in microcomputer |
| 04/15/1992 | EP0480509A1 Arrangement for supplying energy to a load, as well as a drive system and a sound reproduction system comprising such an arrangement |
| 04/14/1992 | US5105352 Offset correction circuit of pwm inverter |
| 04/08/1992 | CN1060149A Pmg-based position sensor and synchronous drive incorporation same |
| 04/07/1992 | CA1298612C Voltage regulation for three-phase inverter |
| 04/07/1992 | CA1298611C Load commutated inverter (lci) induction motor drive |
| 04/01/1992 | EP0478225A2 PMG-based position sensor and synchronous drive incorporating same |
| 04/01/1992 | CN1016055B Control apparatus of ac elevator |
| 03/25/1992 | EP0476588A1 A method and apparatus for computing moment of inertia in a motor speed controller, and a speed control method and apparatus for motor |
| 03/25/1992 | EP0191109B1 Pwm control system for ac motors |
| 03/25/1992 | CA2050084A1 Pmg-based position sensor and synchronous drive incorporating same |
| 03/19/1992 | WO1992004763A1 System for driving induction motor |
| 03/18/1992 | EP0474629A1 Process for compensating a phase and amplitude cycle between a multi-phase actual and set value and circuit for implementing the process. |
| 03/17/1992 | US5097192 Controller of a synchronous motor |
| 03/17/1992 | CA1297528C Electrical machine driven by a pulse-controlled a.c. converter |
| 03/11/1992 | CN1015849B Pulse width modulation type inverter having temp. compensation |
| 03/10/1992 | CA1297150C Cross tie for induction motor drive |
| 02/19/1992 | CN1058760A Device for controlling elevator |
| 02/18/1992 | US5088297 Air conditioning apparatus |
| 02/12/1992 | EP0470607A2 Inverter |
| 02/12/1992 | EP0470143A1 Self-synchronous electric machine with controlled flow |
| 02/05/1992 | EP0469873A2 Waveform generator for inverter control |
| 02/05/1992 | EP0469163A1 Chain traction |
| 01/28/1992 | US5083634 Safety device for elevator |
| 01/16/1992 | DE4021766A1 Improving control of three=phase pulse inverter - modifying switch=over for low RPM to apply freewheeling state at zero voltage to machine |
| 01/16/1992 | DE4021765A1 Improving control of three=phase pulse inverter - changing over inverter switches according to current-tolerance band regulating method |
| 01/14/1992 | US5079924 Circuit for controlling a free-piston engine in particular of a refrigerator compressor |
| 12/31/1991 | CA1293768C Power supply systems for reluctance motors |
| 12/04/1991 | CN1056660A Apparatus for controlling speed of elevator |
| 12/03/1991 | US5070290 Alternating current motor control system with emergency control responsive to failure of power supply |
| 12/03/1991 | CA1292769C Three-phase pwm inverter with speed control and load compensation for aninduction motor |
| 11/26/1991 | US5068777 Pulse width modulation type inverter having temperature compensation |
| 11/26/1991 | CA1292506C Method and apparatus for induction motor drive |
| 11/20/1991 | CN1056288A Safety apparatus for elevator |
| 11/19/1991 | US5066899 Control method of induction motor and device therefor |
| 11/14/1991 | DE4014608C1 Slow running direct drive for spinning machine - incorporates multiphase slip-ring rotor engine where stator coils have 1st frequency converter and rotor coils have 2nd frequency converter |
| 11/13/1991 | CN1056085A Electric vehicle controlling apparatus and inductive motor controlling apparatus |
| 11/06/1991 | EP0455237A2 Apparatus for controlling an electric motor |
| 11/06/1991 | EP0455148A2 Line commutated vector-I-converter |
| 11/06/1991 | EP0454697A1 Device for controlling antiductors. |
| 11/05/1991 | US5063337 Electric motor regulation to obtain desired speed curve |
| 10/31/1991 | DE4034666A1 Hydraulically actuated lift - has counterbalance weights raised and lowered by second hydraulic cylinder |
| 10/30/1991 | EP0453632A2 Motor controller with an improved stopping technique |
| 10/23/1991 | EP0452898A2 Control apparatus for induction motor and electric rolling stock |
| 10/23/1991 | EP0267252B1 Frequency converter for the stabilized supply of asynchronous motors |
| 10/16/1991 | EP0451287A1 Main shaft motor control method |
| 10/15/1991 | US5057760 Torque determination for control of an induction motor apparatus |
| 10/15/1991 | US5057759 Discrete-time AC motor control apparatus |
| 10/09/1991 | CN1055266A Control device for induction motor |
| 10/08/1991 | US5055762 Current controlled full wave transitor bridge inverter for a multiple phase AC machine |
| 10/01/1991 | US5053690 Control method of pulse width modulation inverter and pulse width modulation inverter system |
| 09/25/1991 | EP0447405A1 Control system for a motor. |
| 09/25/1991 | EP0214301B1 System for controlling torque of induction motor |
| 09/18/1991 | EP0446957A2 Procedure for regulating the speed reference of a voltage controlled squirrel-cage motor |
| 09/18/1991 | EP0446936A2 Electric motor controller with bypass contactor |
| 09/18/1991 | EP0446844A2 Cycloconverter and the method of controlling the same |
| 09/17/1991 | US5049793 Method of controlling V/F inverter for machines having mechanical braking systems |
| 09/17/1991 | CA1289189C Electrical motor rotation speed regulation method and device and motors equipped with said device |
| 09/10/1991 | US5047909 Power conversion apparatus with harmonic filtration |
| 09/10/1991 | US5047704 Motor control apparatus and motor controlling method |
| 09/05/1991 | WO1991013488A1 Regulating system for an indirect voltage converter |
| 09/05/1991 | DE4105868A1 Regulating AC motor for balanced interphase currents - using two parallel supplies with coupled current feedback |
| 09/04/1991 | EP0444518A2 Regulating system for a pulse inverter controlled rotating field machine |
| 09/04/1991 | EP0444404A2 High voltage bridge interface for AC and brushless DC motor control |
| 09/03/1991 | CA1288465C Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
| 09/03/1991 | CA1288464C Method and/or apparatus for controlling the motor speed of an electric ac motor and/or a method of determining torque |
| 08/28/1991 | EP0443585A2 Apparatus and process for controlling an inverter operation |
| 08/22/1991 | WO1991012656A1 Method and apparatus for controlling an ac induction motor by indirect measurement of the air-gap voltage |
| 08/21/1991 | EP0442848A2 Variable-speed AC drive utilizing a short-circuit-rotor polyphase induction motor |
| 08/21/1991 | EP0442381A2 Loom operating apparatus and method |
| 08/20/1991 | CA1287877C Turbine helper drive apparatus |
| 08/06/1991 | US5038092 Current control system for inverter |
| 08/06/1991 | US5038090 Servo motor control apparatus |
| 07/24/1991 | EP0437617A1 Method of and device for controlling induction motor for compressor |
| 07/24/1991 | CN1053332A Control fixture for ac-regulating unit |
| 07/23/1991 | US5034872 Current-free synthesis of improved parameter-free zero-impedance converter |
| 07/23/1991 | US5034675 Polyphase machine fed by a pulse-controlled a.c. converter |
| 07/23/1991 | CA1286716C Reactive power processing circuit for a current source gto inverter |
| 07/10/1991 | EP0436138A1 Induction motor controller providing temperature compensation |
| 07/09/1991 | US5031088 Variable-voltage and variable-frequency power converter |
| 07/03/1991 | EP0435038A2 Controller for starting and stopping electric motors |
| 07/02/1991 | US5029230 Motor control apparatus and speed setting apparatus |
| 07/02/1991 | CA1285610C Ac motor drive apparatus |