| Patents for H02P 21 - Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation (7,114) |
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| 06/30/1999 | CN1221251A Automatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor drive |
| 06/30/1999 | CN1221250A Automatic calibration of field-oriented elevator motor drive parameters using standstill motor measurements |
| 06/30/1999 | CN1221245A Apparatus of inverse change |
| 06/24/1999 | WO1999031793A2 Regulation of and regulator for a permanent magnet synchronous motor |
| 06/23/1999 | EP0924852A2 Automatic calibration of field-oriented elevator motor drive parameters using standstill motor measurements |
| 06/23/1999 | EP0924851A2 Automatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor drive |
| 06/23/1999 | EP0924850A2 Automatic calibration of current regulator control compensation for an elevator motor drive with locked rotor |
| 06/16/1999 | EP0922326A1 Improved current control process and device for a voltage converter |
| 06/16/1999 | EP0922325A1 Method for controlling an asynchronous machine |
| 06/10/1999 | WO1999029031A2 Method for controlling a permanent magnet synchronous motor |
| 06/09/1999 | EP0921632A2 Vector control apparatus and method for induction motor using magnetic flux observer of full order |
| 06/09/1999 | CN1219017A Controller for motor |
| 06/08/1999 | CA2118150C Digital current regulator |
| 06/01/1999 | US5909018 Automatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor drive |
| 05/27/1999 | DE19751375A1 Reconstruction of load forces and moments and accelerations for electrical drives from connection parameter information in closed revolution rate or position control loop |
| 05/25/1999 | US5907228 Rotating machine control command method, servocontrol system for implementing said method, rotating machine provided with a system of this kind |
| 05/14/1999 | WO1999023750A1 Power converter |
| 05/12/1999 | CN1043396C Apparatus for generating magnetic flux of induction motor |
| 05/11/1999 | US5903129 Method and apparatus for sensor-less control of permanent magnet synchronous motor |
| 05/05/1999 | CN1215945A Control device for permanent magnet type synchro motor |
| 04/29/1999 | DE19747412A1 Method for synchronising synchronous drive ECG with current space vector using digital field orientation |
| 04/29/1999 | DE19747410A1 Method for synchronising synchronous drive EMF with current space vector using digital field orientation |
| 04/28/1999 | EP0911959A1 Injection molding machine |
| 04/28/1999 | CN1215247A Vector control method for motor and vector control reverse transformation device |
| 03/31/1999 | CN1212305A 洗衣机 Washing machine |
| 03/31/1999 | CN1042780C Elevator controlling unit |
| 03/24/1999 | EP0903845A2 Washing machine |
| 03/23/1999 | US5886498 Sensorless field orientation control method of an induction machine by high frequency signal injection |
| 03/16/1999 | US5883484 Controller for driving a permanent magnet type synchronous motor |
| 03/16/1999 | US5883344 Automatic calibration of field-oriented elevator motor drive parameters using standstill motor measurements |
| 03/09/1999 | US5880572 Variable-speed control method and apparatus for AC motor |
| 03/09/1999 | US5880416 Automatic calibration of motor speed loop gain for an elevator motor control |
| 03/09/1999 | US5880415 Automatic calibration of current regulator control compensation for an elevator motor drive with locked rotor |
| 03/03/1999 | EP0899864A1 Induction motor controller |
| 03/03/1999 | EP0847615B1 Method and device for controlling a four-dimensional vector for a controlled system by means of a discrete-value control element with a limited switching frequency |
| 03/03/1999 | EP0759224B1 Method for controlling the power to be transferred via a mains inverter |
| 03/03/1999 | CN1042315C Device for controlling speed of elevator |
| 03/02/1999 | US5877607 Electric motor controller capable of performing stable current control during load disturbance and/or a regenerating mode |
| 03/02/1999 | US5877606 Starting of synchronous machine without rotor position or speed measurement |
| 03/02/1999 | US5877603 Electric current control method for a servomotor |
| 02/23/1999 | US5874821 Method and apparatus for controlling a brushless electro motor by determining the absolute phase position of the rotor relative to the stator |
| 02/17/1999 | CN1042184C Magnetic-flux determination method for induction motor and its driving and controlling method and system |
| 02/09/1999 | CA2129322C Stator flux oriented control |
| 01/19/1999 | US5861728 Method for measuring motor parameters of induction motor and control apparatus |
| 01/14/1999 | WO1999001929A1 Method for estimating induced electromotive force and speed of induction motor, method for correcting misalignment of shaft thereof, and induction motor controller |
| 01/14/1999 | DE19830133A1 DC brushless motor controller for electric vehicle |
| 01/14/1999 | CA2295772A1 Method for estimating induced electromotive force and speed of induction motor, method for correcting misalignment of shaft thereof, and induction motor controller |
| 01/12/1999 | US5859521 Variable speed controller for an AC motor |
| 01/05/1999 | US5856736 Variable speed AC motor drive for treadmill |
| 12/30/1998 | EP0887921A1 Method of ensuring stability of synchronous machine |
| 12/30/1998 | EP0569556B1 Variable speed wind turbine |
| 12/30/1998 | CN1203705A Method for field-oriented control of induction motor |
| 12/29/1998 | US5854547 Control system for permanent magnet synchronous motor |
| 12/23/1998 | WO1998058444A1 Method of inferring initial pole position of permanent magnet brushless motor |
| 12/16/1998 | EP0884835A1 Method and apparatus for the field-oriented control of a sensorless asynchronmotor |
| 12/16/1998 | EP0884834A1 Method and apparatus for current control of a permanent magnet field oriented controlled synchronmotor with trapezoidal e.m.f |
| 12/16/1998 | EP0884833A1 Variable speed wind turbine |
| 12/08/1998 | US5847943 Method and device for controlling a four-dimensional vector for a controlled system by means of a discrete-value control element with a limited switching frequency |
| 11/26/1998 | WO1998053551A1 Method for controlling an asynchronous machine |
| 11/24/1998 | US5841263 Frequency dependent current control system for an AC motor |
| 11/19/1998 | DE19720697A1 Verfahren zur Steuerung einer Asynchronmaschine Method for controlling an asynchronous machine |
| 11/11/1998 | EP0877474A2 Weakening-field control of a motor |
| 10/29/1998 | WO1998048507A1 Injection molding machine |
| 10/27/1998 | US5828199 Variable speed controller for an induction motor |
| 10/14/1998 | EP0870358A1 Compensated field-orientated control (kfo) |
| 10/13/1998 | US5821727 Induction motor control unit |
| 10/06/1998 | US5818192 Starting of synchronous machine without rotor position of speed measurement |
| 10/01/1998 | WO1998043347A1 Device and method for controlling induction motor |
| 09/29/1998 | US5814967 Apparatus to reduce no load current at low frequencies |
| 09/24/1998 | WO1998042070A1 Apparatus and method for controlling induction motor |
| 09/23/1998 | CN1193843A Process for controlling rotating machine, servocontrol system for implementing said method and rotating machine provided with system of this kind |
| 09/23/1998 | CN1193842A Current sensing circuit for pulse width modulated motor drive |
| 09/22/1998 | US5811957 Speed sensorless hybrid vector controlled induction motor with zero speed operation |
| 09/22/1998 | US5811956 Apparatus and method for controlling torque of induction motor through vector control type inverter |
| 09/17/1998 | WO1998040964A1 Induction motor controller |
| 09/16/1998 | CN1193422A Process and device for correcting the flow direction of the model flow of a sensor-free, field-oriented rotating magnetic field machine down to zero frequency |
| 09/16/1998 | CN1193218A Power-supply switching-over system |
| 09/09/1998 | CN1192607A Variable speed controlling device for induction motor |
| 08/27/1998 | WO1998037625A1 Sensorless rotor position measurement process and device for induction motors with a short-circuit rotor |
| 08/26/1998 | EP0860939A1 Method and device for sensorless rotor postion measurement of a asynchrnous motor with a squirrel cage rotor |
| 08/25/1998 | US5798628 Inverter control system which dynamically varies a voltage vector applied to the inverter based on primary flux and torque deviations |
| 08/18/1998 | US5796236 Slip adjuster for use in electrical motor controllers |
| 08/18/1998 | US5796235 Process and circuits for determining machine-related electro-magnetic and mechanical state variables on electrodynamic induction machines supplied via converters |
| 08/18/1998 | US5796228 Method of controlling rotary magnet multi-phase synchronous motor and control therefor |
| 08/13/1998 | DE19703248A1 Verfahren und Vorrichtung zur Bestimmung einer Drehzahl einer geberlosen, feldorientiert betriebenen Drehfeldmaschine Method and apparatus for determining a rotational speed of a sensorless, field-oriented induction machine |
| 08/12/1998 | EP0858155A1 Method for the regulation of a rotating machine, regulation system to implement said method and rotating machine equipped with such a system |
| 08/11/1998 | US5793834 Method for detecting position of linear stepping motor and apparatus therefor |
| 08/06/1998 | WO1998034337A1 Means and device for determining the angular velocity of a rotor of polyphase machine operated by field orientation without a transmitter |
| 08/06/1998 | CA2279305A1 Method and device for determining the angular velocity of a rotor of a polyphase machine operated by field orientation without a transmitter |
| 08/06/1998 | CA2226390A1 Process for regulating a rotating machine, control system to implement the said process, and rotating machine equipped with such a system |
| 08/05/1998 | CN1189440A Current/voltage control apparatus for elevator system |
| 07/07/1998 | US5777452 Corrector, apparatus, and a method for controlling the electromagnetic torque of an asynchronous machine |
| 07/07/1998 | US5777447 Control apparatus for brushless DC motor |
| 06/17/1998 | EP0847617A1 Process and device for correcting the flow direction of the model flow of a sensor-free, field-oriented rotating magnetic field machine down to zero frequency |
| 06/17/1998 | EP0847615A1 Method and device for controlling a four-dimensional vector for a controlled system by means of a discrete-value control element with a limited switching frequency |
| 06/11/1998 | WO1998025335A1 Sensorless control method and apparatus of permanent magnet synchronous motor |
| 06/09/1998 | US5764499 Direct a.c. converter |
| 05/28/1998 | DE19648534A1 Rotor flux orientated control method for asynchronous drive |
| 05/26/1998 | US5757161 Apparatus and method for limiting the speed of an electric motor |
| 05/22/1998 | WO1998021817A1 Method and device for determining the rotational speed of a polyphase machine operating with field orientation and without a sensor |