Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02P - Control or regulation of electric motors, generators, or dynamo-electric converters; Controlling transformers or reactors or choke coils › H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control
Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487)
01/1991
01/16/1991EP0408493A1 Stopping device for single-phase asynchronous motor with capacitor
01/16/1991EP0188576B1 Orbital shaker
01/15/1991USRE33519 Method and apparatus for controlling induction motor
01/08/1991US4983895 Method and apparatus for operating vacuum cleaner
01/01/1991US4982145 Method and apparatus for the optimization of thyristor power supply transport time delay
01/01/1991US4982142 Circuit for controlling the speed of a magnetic tape reel motor of audio recording/playing mechanism and method therefor
12/1990
12/27/1990EP0403842A2 Spindle position/speed control unit
12/27/1990EP0403658A1 Method of controlling the speed of a servomotor
12/27/1990CA1278334C Device for the controllable operation of out-of-balance drives with three-phase motors
12/18/1990USRE33500 Electronic digitized proportional-integral controller
12/18/1990CA1278072C Orbital shaker
12/12/1990EP0402267A1 Drive system of an electric motor with variable rotation speed and apparatus furnished with such a system
12/11/1990US4977359 Servo motor system requiring a reduced number of signal transmission lines
12/11/1990US4976186 Control system for mechanically adjustable speed motor drives
12/04/1990US4975979 Three phase motor control for downhole logging tools
11/1990
11/29/1990DE3917127A1 Universal motor drive e.g. for washing machine - has triac-switched field windings supplied with AC during alternate half-cycles for duration corresp. to speed of motor
11/28/1990EP0399146A1 Control system for switched reluctance motor operating as a power generator
11/28/1990CN1010642B Control arrangement for turning induction motor
11/28/1990CN1010640B Controller of electric power converter
11/22/1990EP0397818A1 A process and device for changing the actual rotation speed of a multi-phase non-synchronous motor and a suitable motor system for applying the process.
11/22/1990DE3916517A1 Hydrostatic drive for motor vehicle three=phase generators - contains electronic controller regulating hydromotor speed according to generator frequency
11/14/1990EP0396749A1 System for controlling servo motor
11/13/1990US4969757 Motor torque control
11/09/1990CA2016016A1 Control system for switched reluctance motor operating as a power generator
10/1990
10/31/1990EP0185773B1 Control board for ac motors
10/30/1990US4967134 Synthesis of load-independent ac drive systems
10/30/1990US4967133 Motor control apparatus
10/30/1990US4967128 Servo motor control device
10/24/1990CN1010159B Electromechanical actuator
10/23/1990US4965847 Method and apparatus for detecting deviation of motor speed from frequency of power supply
10/23/1990US4965444 Automatic gain control fiber optica-to-electrical transceiver
10/17/1990CA2009581A1 Current controlled full wave transistor bridge inverter for a multiple phase ac machine
10/10/1990EP0245318B1 Circuit for producing a measurement signal for the frequency of an alternating current signal
10/04/1990DE4009654A1 Domestic electric oil press - has control microprocessor for motor on-off switching and heating of press cylinder
10/03/1990EP0390036A1 Motor-driving circuit and wire-bonding apparatus
09/1990
09/26/1990EP0388464A1 Control device.
09/25/1990US4959602 Ac motor drive with improved voltage-source inverter
09/19/1990CN1009698B Method and apparatus for controlling voltage type convertor by p.w.m.
09/18/1990US4958269 Current control for microprocessor motor drive
09/18/1990US4958116 Method for controlling AC induction motor
09/18/1990CA1274275A1 Setting and dialogue device, particularyl for a speed changer
09/12/1990EP0386585A2 Multiplexed digital control device
09/11/1990US4956596 Variable speed drive system
09/11/1990US4956593 Servo motor controlling method
08/1990
08/29/1990EP0384788A1 Composable protection and control device for a motor
08/23/1990WO1990009699A1 Method of controlling ac motor
08/22/1990EP0382867A1 Control device for the torque-constants of a permanent magnet excited tree-phase motor
08/21/1990US4950970 Induction motor control system
08/21/1990US4950967 Servomotor control apparatus
08/15/1990CN1009186B Controlling apparatus of alternating current elevator
08/15/1990CN1009185B Control device for alternating current elevator
07/1990
07/31/1990US4944143 Speed control means and apparatus for a repeatable material processing apparatus
07/31/1990CA1272270A1 Apparatus for controlling the velocity of a member in a digital printing system
07/25/1990EP0379391A1 Mass velocity controller
07/24/1990US4942775 Method of and device for accelerating test pieces on a circular path
07/24/1990US4942640 Automatic electric vacuum cleaner with temporary manual override
07/17/1990US4942347 Motor drive circuit
07/17/1990US4942346 Circuit for controlling rotational direction and rotational speed of an electric motor
07/10/1990US4940927 Three-phase A-C speed control for variable torque motor
07/10/1990US4940391 Compressor surge detection system
07/03/1990US4939437 Motor controller
06/1990
06/28/1990WO1990007227A1 Speed controller for electric motor
06/27/1990EP0374797A1 Digital servo system for controlling rotational speed of rotary body
06/20/1990CA2004712A1 Control system for mechanically adjustable speed motor drives
06/19/1990US4934844 Remote-control system for sewing machine
06/14/1990WO1990006623A1 Control system for a motor
06/14/1990WO1990006622A1 Method of controlling the speed of a servomotor
06/12/1990US4933985 Rotation drive device
06/12/1990US4933834 Control system with improved robustness to disturbances
06/06/1990EP0371442A1 Control method of pulse width modulation inverter and pulse width modulation inverter system
05/1990
05/31/1990WO1990006015A1 Vscf start system with a constant acceleration
05/22/1990US4928052 Power supply regenerating circuit
05/22/1990US4928045 Circuit arrangement for generating a measurement signal associated with the frequency of an alternating current signal
05/17/1990WO1990005407A1 A process and device for changing the actual rotation speed of a multi-phase non-synchronous motor and a suitable motor system for applying the process
05/16/1990EP0368557A2 Compressor system comprising a surge detection system
05/10/1990DE3931935A1 Reference current cascade for drive motor regulation - provides limit value inputs for limiting devices connected to revolution regulator
05/08/1990US4924373 Apparatus and method for controlling switching elements in a PWN-controlled voltage source inverter
05/08/1990US4924157 Motorized video projection screen control with digital interface
04/1990
04/25/1990EP0364589A1 Device for switching connection of a three-phase induction motor
04/24/1990US4920293 Squirrel-cage induction motor
04/18/1990CN1007689B Printer-driving motor and its control device
04/17/1990US4918365 Electromechanical actuator having control and drive circuit
04/11/1990EP0363264A1 Synchronous motor whose sense of rotation can be selected
04/11/1990EP0362399A1 Motor output change-over control unit
04/05/1990WO1990003689A1 Control device
04/03/1990US4914726 Mass velocity controller
04/03/1990US4914361 Method and apparatus for controlling the speed of moving body
03/1990
03/27/1990US4912390 Apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero
03/27/1990US4912386 Balanced bridge feedback control system
03/27/1990US4912381 Adaptive control system
03/13/1990US4908564 Device for speed control of an asynchronous motor
03/06/1990CA1266507A1 Variable-speed generator/motor system
02/1990
02/28/1990EP0356085A2 Automatic gain control fiber optic-to-electrical transceiver
02/28/1990EP0355115A1 Process for regulating the speed of rotation of an electric motor.
02/27/1990US4905135 Inverter apparatus
02/22/1990WO1990001828A1 A method for retarding an induction motor
02/22/1990DE3924422A1 Correcting revolution rate measurement value - restricting successive output value changes to defined values for roundness or vibration-dependent errors
02/21/1990CN1006947B Arrangement for controlling motor speed
02/20/1990US4902954 Alternating current motor control apparatus
02/20/1990US4902949 Motor servo circuit
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