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 25 - Arrangements or methods for the control of ac-motors characterised by the kind of ac-motor or by structural details
Patents for H02P 25 - Arrangements or methods for the control of ac-motors characterised by the kind of ac-motor or by structural details (7,591)
01/1991
01/23/1991EP0187867B1 Method of and apparatus for controlling a synchronous motor
01/16/1991EP0408493A1 Stopping device for single-phase asynchronous motor with capacitor
01/16/1991EP0407590A1 Servo control apparatus
01/08/1991US4983902 Fast current discharging switch for a variable reluctance motor drive
01/08/1991US4983893 Actuator with stepping motion function
01/08/1991CA1278821C Electrical drive circuit for a variable-speed switched reluctancemotor
01/03/1991DE3921769A1 RPM control circuit for asynchronous electric motor - has variable inductance in series with motor provided by transformer primary
01/01/1991US4982147 Power factor motor control system
01/01/1991US4982143 Phase control circuit for protection of a motor against thermal overload
12/1990
12/27/1990WO1990016111A1 A device for controlling a reluctance motor
12/27/1990EP0238509B1 Solenoid driver control unit
12/25/1990US4980630 Method and apparatus for speed regulation of an asynchronous motor using strobe control
12/20/1990DE3919628A1 Capacitor start circuit for single phase induction motor - has two capacitors dimensioned to satisfy start and run condition with relay responding to rotor acceleration
12/20/1990DE3915623C1 Permanent magnet electrical machine - has magnetic flow direction crossing direction of motor movement and permanent magnetic excitation
12/13/1990WO1990015476A1 Driving system and controller therefor
12/13/1990WO1990015475A1 Stepping motor
12/13/1990WO1990015473A1 Motor or position transducer
12/11/1990US4977363 Overheat preventing system of A.C. motor
12/11/1990US4977359 Servo motor system requiring a reduced number of signal transmission lines
12/06/1990DE3916870A1 Dynamoelectric machine for vehicle drive and regenerative brake - has pulsed commutation, speed, direction and output control using solid state circuitry and cylindrical or salient pole construction
12/05/1990EP0401067A1 Excitation device for electromagnetic actuator
12/05/1990EP0400907A2 Throttle actuator and control system
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
11/28/1990EP0399475A2 PLL speed control circuit
11/28/1990EP0399146A1 Control system for switched reluctance motor operating as a power generator
11/28/1990CN1010646B Driving arrangement for ac motor
11/28/1990CN1010645B Control apparatus for brush-less motor
11/28/1990CN1010643B Method of controlling electric motor for air-blower of air conditioner
11/27/1990US4973892 Energization system for linear motor transient reduction
11/20/1990US4972134 Motor control circuit for automatic washer
11/15/1990WO1990013941A1 Reluctance-type electric motor
11/14/1990EP0397514A2 Bridge inverters and the control thereof
11/14/1990EP0396859A2 Control system for low speed switched reluctance motor
11/14/1990EP0396858A2 Control system for high speed switched reluctance motor
11/09/1990CA2016016A1 Control system for switched reluctance motor operating as a power generator
11/09/1990CA2016015A1 Control system for high speed switched reluctance motor
11/09/1990CA2016006A1 Control system for low speed switched reluctance motor
10/1990
10/31/1990EP0394268A1 Motorised faders.
10/30/1990US4967134 Synthesis of load-independent ac drive systems
10/30/1990US4967129 Power system stabilizer
10/24/1990CN1010164B Induction motor control apparatus and method
10/23/1990US4965498 Electrically operated system for drawing curtains and other types of barriers
10/18/1990WO1990012278A1 Process for the detection without a sensor of the angle of rotation in undamped synchronous machines, preferably excited by permanent magnets
10/16/1990US4963806 Servo positioning apparatus
10/10/1990CN1009984B Power supply controler for oscillating motor for driving compressor unit
10/09/1990USRE33379 Microprocessor based motor control
10/04/1990DE4009654A1 Domestic electric oil press - has control microprocessor for motor on-off switching and heating of press cylinder
10/02/1990US4961038 Torque estimator for switched reluctance machines
09/1990
09/26/1990EP0388464A1 Control device.
09/25/1990US4959596 Switched reluctance motor drive system and laundering apparatus employing same
09/20/1990DE3908882A1 Capacitor control of single-phase induction motors
09/19/1990EP0387467A2 Switched reluctance motor and operating method
09/19/1990CN1045491A Method and apparatus for controlling ac current regulator of single-phase or polyphase
09/18/1990US4958118 Wide range, self-starting single phase motor speed control
08/1990
08/23/1990WO1990009700A1 Control arrangement for a reluctance 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
08/22/1990CN1044879A Method and arrangement for controlling single-phase or multiphase ac current regulator
08/21/1990US4950969 Variable motor speed control for automatic washer
08/21/1990CA1273056A1 Turbine helper drive apparatus
08/16/1990EP0381789A1 Control method and device for single or multiphase AC voltage converters
08/15/1990CN1009236B Gating speed regulation method and apparatus thereof
08/09/1990WO1990009055A1 Linear motor propulsion system
08/08/1990WO1990009701A1 Process and device for controlling single-phase or multiphase a.c. controllers
08/08/1990CN1044551A Method and apparatus for controlling ac current regulator of singl-phase or polyphase
08/01/1990EP0379608A1 Method and device for controlling single or multiphase AC voltage converters
07/1990
07/31/1990CA2008842A1 Fault management system for a switched reluctance motor
07/25/1990EP0378723A1 Automatic-washer drive
07/25/1990EP0378693A1 Coil winding structure of a.c. motor coil
07/25/1990EP0378640A1 Reluctance motor
07/24/1990US4943760 Control systems for variable reluctance electrical machines
07/24/1990US4942640 Automatic electric vacuum cleaner with temporary manual override
07/18/1990EP0378331A2 Servo circuit
07/18/1990EP0378328A2 Servo positioning circuit
07/18/1990EP0377771A1 Torque control method for multiphase electronically commutated electric motors, especially for synchronous motors
07/17/1990US4942346 Circuit for controlling rotational direction and rotational speed of an electric motor
07/17/1990US4942345 Pole changing switched reluctance motor and method
07/17/1990US4942344 Control system for brushless motors
06/1990
06/26/1990US4937510 Control apparatus for a linear motor for driving a pickup
06/19/1990US4935678 Universal motor speed control circuit for hand mixer
06/12/1990US4933621 Current chopping strategy for switched reluctance machines
06/12/1990US4933620 Control system for low speed switched reluctance motor
06/06/1990EP0371777A2 Magnetic disk drive
06/05/1990US4931715 Synchronous motor torque control device
05/1990
05/30/1990EP0370105A1 Digital follow-up system
05/22/1990US4928051 Electric motor
05/16/1990EP0301036B1 Control system for a variable-reluctance motor, and method
05/09/1990EP0366996A1 Induction motor on single-phase network
05/08/1990US4924160 Staggered seeking method for disk drive sector servo
05/08/1990CA1268858A1 Adaptive control technique for a dynamic system
05/03/1990WO1990004882A1 Servo control apparatus
05/01/1990US4922142 Method and apparatus for controlling the carriage of a linear motor
04/1990
04/25/1990EP0364589A1 Device for switching connection of a three-phase induction motor
04/19/1990WO1990004283A1 Reluctance motor
04/11/1990EP0362496A2 Control circuit for a universal motor
04/11/1990EP0362495A2 Electrical control circuit for a universal motor
04/11/1990EP0362399A1 Motor output change-over control unit
04/10/1990US4916368 Controlling method and device for permanent magnet synchronous motor
04/05/1990WO1990003689A1 Control device
04/05/1990DE3931093A1 Universal motor torque control circuit - includes two differential amplifier stages in series, controlled by load current proportional voltage
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