| Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487) |
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| 03/03/1992 | US5093609 Servomotor control method |
| 02/27/1992 | DE4026091A1 Regulation system for electrical machine drive - uses predicted variation for calculation of required optimal compensation |
| 02/18/1992 | US5089760 DC bus voltage regulation by controlling the frequency in a variable frequency inverter |
| 02/18/1992 | US5089759 Electrical motor position controller |
| 02/18/1992 | US5088297 Air conditioning apparatus |
| 02/12/1992 | EP0141859B1 Servo control circuit |
| 02/05/1992 | EP0469873A2 Waveform generator for inverter control |
| 02/05/1992 | EP0469617A1 Closed-loop feedback control system having an adaptive filter |
| 02/05/1992 | EP0469151A1 Method of learning feed-forward gain in motor control |
| 02/05/1992 | EP0241563B1 Speed control system |
| 02/04/1992 | US5086261 Motor speed control device for use in an image forming apparatus |
| 02/04/1992 | CA1295378C Automatic gain control fiber optic-to-electrical transceiver |
| 02/04/1992 | CA1295363C Process for determining the rotational speed of a machine |
| 01/22/1992 | EP0247206B1 Speed control system |
| 01/16/1992 | DE4033737A1 Starting and operating circuit for single phase electromotor - includes first capacitor for starting only and second capacitor with another capacitance only for motor running |
| 01/14/1992 | US5080276 Motor-driving circuit and wire-bonding apparatus |
| 12/24/1991 | US5075611 Single phase ac motor control device |
| 12/24/1991 | US5075607 Method and apparatus for operating vacuum cleaner |
| 12/17/1991 | US5073746 Speed control method for servomotors |
| 12/11/1991 | EP0460776A1 Stepping motor control |
| 12/03/1991 | US5070291 Connection switching apparatus for three-phase induction motor |
| 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 | US5068587 Spindle drive control apparatus for a machine tool |
| 11/26/1991 | CA1292506C Method and apparatus for induction motor drive |
| 11/19/1991 | CA1292279C Arrangement for measuring the slip of electric induction motors |
| 11/06/1991 | EP0455148A2 Line commutated vector-I-converter |
| 11/05/1991 | US5063337 Electric motor regulation to obtain desired speed curve |
| 11/05/1991 | US5062278 Air-conditioning apparatus including an indoor unit and an outdoor unit having its compressor driven by a three-phase AC power supply |
| 10/22/1991 | US5060151 Speed control for orbital shaker with reversing mode |
| 10/17/1991 | WO1991015893A1 Method of regulating gain of motor control |
| 10/15/1991 | US5058191 Motor rotation speed control circuit |
| 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 |
| 10/02/1991 | EP0449625A2 Mass velocity controller |
| 10/01/1991 | US5053690 Control method of pulse width modulation inverter and pulse width modulation inverter system |
| 09/25/1991 | EP0448136A2 Motor rotation control apparatus |
| 09/25/1991 | EP0447405A1 Control system for a motor. |
| 09/17/1991 | US5049800 Motor output changeover control apparatus |
| 09/17/1991 | CA1289189C Electrical motor rotation speed regulation method and device and motors equipped with said device |
| 09/11/1991 | EP0235168B1 Video recorder with variable image searching speed |
| 09/10/1991 | CA1288807C Electrical motor system |
| 09/05/1991 | WO1991013489A1 Method of learning feed-forward gain in motor control |
| 09/04/1991 | CN1054296A Operation control circuit for pump motor |
| 09/03/1991 | US5046123 Error signal detection circuit in a servo control device |
| 09/03/1991 | CA1288465C Electronic motor controls, laundry machines including such controls and/or methods of operating such controls |
| 08/28/1991 | EP0443612A1 Controller of motors |
| 08/28/1991 | EP0443585A2 Apparatus and process for controlling an inverter operation |
| 08/07/1991 | CN1053686A Method and apparatus for controlling reciprocation of movable mirror of interferometric spectrophotometer |
| 08/06/1991 | US5038088 Stepper motor system |
| 07/30/1991 | US5036266 Mass velocity controller |
| 07/23/1991 | US5034669 Regenerative circuit for motor drive system having leakage current compensation |
| 07/23/1991 | US5034668 Control circuit for an electric motor |
| 07/17/1991 | EP0436945A2 Method for controlling reciprocation of movable mirror of interferometric spectrophotometer |
| 07/17/1991 | CA2034180A1 Electromechanical motor reversing |
| 07/11/1991 | DE4100341A1 Sewing machine control - uses motor speed and needle position to regulate motor speed according to the situation and prevent slip |
| 07/09/1991 | CA1285984C Control mechanism for a separately excited dc drive motor and method for control of a dc drive motor |
| 06/04/1991 | US5021723 AC motor control |
| 06/04/1991 | US5021722 Composable protection and control apparatus for motors |
| 06/04/1991 | CA1284672C Motor rotation servo control apparatus |
| 05/28/1991 | US5019958 Generalized synthesis of control systems of zero-order/instantaneous response and infinite disturbance rejection ratio |
| 05/21/1991 | US5017855 Current controlled inverter |
| 05/08/1991 | DE3937036A1 Regulating pulsed current for three=phase motor - using two point regulator controlling transistor or thyristor power output stage |
| 05/07/1991 | US5014336 Motor control |
| 05/07/1991 | US5013990 Energy conserving electric motor power control method and apparatus |
| 05/07/1991 | US5013985 Microcomputer with motor controller circuit |
| 05/07/1991 | US5013981 Control mechanism for a drive motor or the like |
| 04/30/1991 | US5012173 Casing structure for an amplifier unit for an AC spindle |
| 04/30/1991 | US5012172 Control system for switched reluctance motor operating as a power generator |
| 04/30/1991 | US5012169 Motor drive system |
| 04/24/1991 | EP0424364A2 Method and apparatus for operating vacuum cleaner |
| 04/24/1991 | EP0424363A2 Method and apparatus for operating vacuum cleaner |
| 04/24/1991 | CN1012453B Servo system |
| 04/23/1991 | CA1283469C Control mechanism for a printing machine drive motor or similar |
| 04/18/1991 | WO1991005299A1 Drive systems for transportation mechanisms |
| 04/18/1991 | WO1991005298A1 Process and device for imitating the speed in incremental measuring systems |
| 04/16/1991 | CA1283164C Control apparatus and method for operating a switched reluctance motor |
| 04/09/1991 | US5006777 AC input system for computer-based control system |
| 04/09/1991 | US5006770 Servomotor velocity control apparatus |
| 04/09/1991 | US5005382 Electromechanical motor reversing |
| 04/04/1991 | DE3932214A1 Verfahren und vorrichtung zur nachbildung der geschwindigkeit bei inkrementalen messsystemen Method and device for replica of the rate for incremental measuring systems |
| 04/03/1991 | EP0420754A1 Control device for a movable part, especially for a pitching device |
| 03/26/1991 | CA1282111C Low cost instant reversing circuit |
| 03/20/1991 | CN1050113A Method and apparatus for optimization of thyristor power supply transport time delay |
| 03/19/1991 | US5001770 Synthesis of improved zero-impedance converter |
| 03/13/1991 | EP0416608A2 A method and apparatus for the optimization of thyristor power supply transport time delay |
| 03/12/1991 | US4999557 Integration proportional controller in servo-control system |
| 03/09/1991 | CA2024921A1 Method and apparatus for the optimization of thyristor power supply transport time delay |
| 03/06/1991 | EP0415772A2 Method and apparatus for controlling motors |
| 03/06/1991 | EP0414939A1 Vibrationless starting and braking control for transporting equipment |
| 03/06/1991 | EP0414662A1 Method and device for driving an asynchronous motor with speed control by means of a controlled inverter |
| 02/20/1991 | EP0413447A2 Drive arrangement |
| 02/20/1991 | EP0413032A1 Method of controlling ac motor |
| 02/19/1991 | US4994950 Waveform generator for inverter control |
| 02/19/1991 | US4994723 Digital servo system for controlling rotational speed of rotary body |
| 02/06/1991 | EP0126778B1 Servomotor control system |
| 02/05/1991 | US4990001 Synthesis of drive systems of infinite disturbance rejection ratio and zero-dynamics/instantaneous response |
| 01/23/1991 | EP0409185A2 Method of calculating motor control voltage and motor control device using the method |
| 01/22/1991 | US4987351 Load-based control of an AC motor |