| 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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| 06/30/1999 | CN1221250A Automatic calibration of field-oriented elevator motor drive parameters using standstill motor measurements |
| 06/30/1999 | CN1221245A Apparatus of inverse change |
| 06/29/1999 | US5917302 Harmonic current attenuating device of a motor |
| 06/29/1999 | US5917295 Motor drive system having a plurality of series connected H-bridges |
| 06/29/1999 | CA2046268C Process and device for controlling single-phase or multiphase a.c. controllers |
| 06/24/1999 | DE19843999A1 Converter arrangement for feeding speed-controlled 3- phase induction machine from AC network via DC intermediate circuit |
| 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 |
| 06/22/1999 | US5915070 Motor driving apparatus for pulse-width modulation controlling a DC voltage according to a rotation speed setting information |
| 06/22/1999 | US5914984 Method and device for pulse width modulation control |
| 06/16/1999 | EP0922325A1 Method for controlling an asynchronous machine |
| 06/15/1999 | US5912543 Circuit having a digital controller for operation of a synchronous T motor |
| 06/09/1999 | EP0921632A2 Vector control apparatus and method for induction motor using magnetic flux observer of full order |
| 06/09/1999 | EP0921028A2 Electric motor rotor holding arrangement |
| 06/09/1999 | CN1219017A Controller for motor |
| 06/08/1999 | CA2118150C Digital current regulator |
| 06/03/1999 | WO1999027642A1 Commutator motor control system |
| 06/02/1999 | EP0920120A2 Method and apparatus for controlling the movement path of the workpiece supporting head of an orbital vibration welding system |
| 06/01/1999 | US5909367 Modular AC-AC variable voltage and variable frequency power conveter system and control |
| 06/01/1999 | US5909098 Downhole pumping system with variable speed pulse-width modulated inverter coupled to electrical motor via non-gap transformer |
| 06/01/1999 | US5909018 Automatic fine-tuning of rotor time constant and magnetizing current in field-oriented elevator motor drive |
| 05/25/1999 | US5907228 Rotating machine control command method, servocontrol system for implementing said method, rotating machine provided with a system of this kind |
| 05/19/1999 | EP0916026A1 Process for regulating a unit or a frequency converter |
| 05/14/1999 | WO1999023750A1 Power converter |
| 05/12/1999 | EP0915348A2 Ground fault detection and protection method for a variable speed ac electric motor |
| 05/12/1999 | CN1043395C Method and apparatus for controlling single phase induction motor |
| 05/11/1999 | US5903127 Method and apparatus for controlling current in a switched reluctance motor |
| 05/06/1999 | EP0843912B1 Process and device for operating an asynchronous motor |
| 05/05/1999 | CN1215945A Control device for permanent magnet type synchro motor |
| 05/05/1999 | CN1043281C Motor driven door device |
| 04/28/1999 | EP0911959A1 Injection molding machine |
| 04/28/1999 | EP0769221B1 Load-commutated synchronous motor drive |
| 04/28/1999 | CN1215248A Harmonic current attenuator for electric motor |
| 04/28/1999 | CN1215247A Vector control method for motor and vector control reverse transformation device |
| 04/28/1999 | CN1215245A Frequency converter |
| 04/27/1999 | CA2005839C Speed control for inverter driven washing machine |
| 04/22/1999 | DE19848247A1 User interface for AC drive |
| 04/21/1999 | EP0910162A1 Transformer type converter |
| 04/20/1999 | US5896283 Controller for electric vehicle |
| 04/20/1999 | US5896019 Motor control device |
| 04/14/1999 | EP0909016A2 Servo-motor driving method |
| 04/07/1999 | EP0907238A1 Multiplex pulse-width modulation power converter |
| 04/06/1999 | CA2156123C Voltage, phase and frequency control by miniature inverter system |
| 03/31/1999 | CN1042780C Elevator controlling unit |
| 03/30/1999 | US5889380 Current command type PWM inverter apparatus for driving and controlling three-phase motor based on periodical state updating timings |
| 03/23/1999 | US5886555 Pulse production circuit |
| 03/23/1999 | US5886491 Position control unit for electric motor |
| 03/23/1999 | CA2157424C Control apparatus for electric vehicles |
| 03/16/1999 | US5883496 Electric vehicle power supply |
| 03/16/1999 | US5883489 High speed deep well pump for residential use |
| 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 |
| 03/10/1999 | CN1042482C Tranforming device and air conditioner using said device |
| 03/09/1999 | US5880950 Inverter driving circuit for brushless d.c. motor |
| 03/09/1999 | US5880574 Control system for electric vehicle |
| 03/09/1999 | US5880570 Method and apparatus for controlling a synchronous motor |
| 03/09/1999 | US5880550 Variable-speed dynamotor |
| 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 | EP0759224B1 Method for controlling the power to be transferred via a mains inverter |
| 03/03/1999 | CN1209687A Harmonic current attenuation device for electric motor |
| 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 | US5877603 Electric current control method for a servomotor |
| 03/02/1999 | US5877601 Control system for electric vehicle and control method therefor in which an inverter relay is controlled at the time of its re-closing after being disconnected |
| 02/25/1999 | DE19735742A1 Current regulator cascade with asynchronous machine |
| 02/24/1999 | CN1042278C Low noise operation of a machine |
| 02/23/1999 | US5875414 Method and apparatus for protecting switching element of inverter from being overheated |
| 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 |
| 02/23/1999 | US5874818 Method and apparatus for sensing load current in a motor controller |
| 02/23/1999 | CA2102753C Method and apparatus for driving motor |
| 02/16/1999 | US5872710 Inverter control device |
| 02/16/1999 | CA2131971C Motor control system and apparatus for providing desired three-phase voltage therein using a main transformer energized through an auto transformer |
| 02/10/1999 | CN1207606A Method and apparatus for control of pulse width modulation inverter unit |
| 02/10/1999 | CN1042080C Inverter apparatus |
| 02/09/1999 | US5869954 Apparatus for the controlled supply of current to an electrical device |
| 02/09/1999 | CA2160170C Electronically communated motor control |
| 02/03/1999 | EP0895342A2 A control circuit for vibrating compressors |
| 02/03/1999 | CN1206885A Pulse width modulator |
| 01/26/1999 | CA2009297C Method and apparatus for controlling single or multiphase a.c. power controllers |
| 01/21/1999 | DE19831582A1 Current converter arrangement for AC motor drive |
| 01/20/1999 | CN1205465A Pulse width modulation control which data transfer is inhibited by overflow signal |
| 01/20/1999 | CN1041780C Inverter 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 |
| 01/13/1999 | CN1204753A Air conditioner automatically controlling operation based on supply voltage or supply frequency |
| 01/13/1999 | CN1041680C Method and arrangement for controlling induction motor |
| 01/13/1999 | CN1041679C Induction motor control apparatus providing high efficiency with rapid response to changes in load torque |
| 01/12/1999 | US5859521 Variable speed controller for an AC motor |
| 01/12/1999 | US5859514 For controlling a load |
| 01/12/1999 | CA2060354C Ac motor drive system |
| 01/07/1999 | EP0889580A2 Device and method to start a synchronous motor |
| 01/07/1999 | EP0888922A1 Asynchronous motor drive control |
| 01/07/1999 | EP0655175B1 Process for operating permanently excited single-phase alternating current machines |
| 01/06/1999 | CN1204182A Motor drive apparatus and motor driving method capable of simply reducing rotating speed in PWM mode |
| 01/05/1999 | US5856736 Variable speed AC motor drive for treadmill |
| 12/30/1998 | EP0887921A1 Method of ensuring stability of synchronous machine |