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 8 - Arrangements for controlling dynamo-electric motors rotating step by step
Patents for H02P 8 - Arrangements for controlling dynamo-electric motors rotating step by step (4,097)
11/1981
11/03/1981CA1111905A2 Linear velocity change stepping motor circuit
11/03/1981CA1111904A1 Stepping motor drive method and apparatus
11/03/1981CA1111903A1 Apparatus for generating stepping motor pulses
10/1981
10/27/1981US4297625 Apparatus for dividing the step angle of a stepping motor
10/13/1981US4295083 Pulsed energy stepping motor power control unit
10/07/1981EP0036931A1 Stepper motor damping system
10/06/1981US4293807 Stepping motor control apparatus
09/1981
09/30/1981EP0036424A1 Circuit arrangement for an asynchronous motor drive with variable speed.
09/15/1981US4289997 Drive apparatus having at least two electric motors
09/15/1981US4289983 Encoder for monitoring bidirectional motion
09/09/1981EP0035258A2 Arrangement for positioning of a stepping motor in a teleprinter
08/1981
08/25/1981US4286202 Electronic damping of stepper motor
08/18/1981US4284940 Electrical wave synthesizer for controlling an electric motor
08/11/1981US4283672 Stepper motor drive
08/06/1981WO1981002207A1 Electric motor control device
08/04/1981US4282472 Digital generation and control of variable phase-on motor energization
08/04/1981US4282471 Control system for a multi-phase motor
07/1981
07/28/1981US4281405 Reduction of energy consumption of electronic timepiece
07/21/1981US4280084 Method of and apparatus for operating stepping motors
07/14/1981US4278926 Step motor circuit
07/14/1981CA1105079A1 Pulse to step stepping motor control circuit
07/07/1981US4277732 Low power stepping motor driver circuit and method
07/07/1981US4276840 Electronic sewing machine with a feed control device
06/1981
06/30/1981US4276626 Electronic watch
06/24/1981EP0030611A2 Method and arrangement for the control and regulation of a motor having a permanent-magnet rotor
06/16/1981US4274150 Electronic watch
06/16/1981US4274041 Voltage commanded stepping motor control circuit
06/09/1981US4272837 Electronic timepiece with rotation detector
06/09/1981US4272713 Switching transconductance amplifier for inductive loads
06/09/1981US4271773 Pulse motor rotation phase adjusting system of a sewing machine
06/09/1981CA1102866A1 Stepping motor energizing circuit and method for minimizing step position error
06/02/1981US4271496 Electronic watch
05/1981
05/26/1981CA1101927A2 Shift register for controlling the energization of a multiwinding motor
05/26/1981CA1101926A1 Shift register for controlling the energization of a multiwinding motor
05/26/1981CA1101925A1 Current control system for a stepping motor
05/20/1981EP0028722A1 Circuit arrangement for the continuous monitoring of the operation and fault diagnosis of the control circuit of a stepping motor
05/06/1981EP0027873A1 Electrical stepper motor
05/06/1981EP0027867A1 Control device for the driving mechanism of a stepping motor for adjustment of the stitch width and/or the feeding lenght in a sewing machine
05/06/1981EP0027856A1 Arrangement for regulating the number of revolutions and phase position of synchronous motors
04/1981
04/28/1981US4264848 Device for the monitored control of a stepping motor
04/16/1981WO1981001084A1 Circuit arrangement for an asynchronous motor drive of controlled stepping
04/14/1981US4262240 Stepping motor apparatus comprising electrical detent means
04/14/1981US4261820 Apparatus for separating a mixture of liquids of different specific weights, e.g. oil and water
04/01/1981EP0026002A1 Bipolar single-phase stepping motor with two directions of rotation
03/1981
03/31/1981US4258622 Method of positioning a moving part and a printer operating in accordance with said method
03/18/1981EP0025081A1 Incremental speed control of a stepping motor
03/11/1981EP0024737A1 Detector for the movement of a stepping motor
03/10/1981US4255696 Synchronous motor system
03/10/1981US4255693 Closed loop stepper motor circuitry without encoder
03/03/1981US4254491 Pulse control for an electric clock
03/03/1981US4254368 Apparatus for driving a motor
02/1981
02/24/1981US4253052 Stepping motor control circuit
02/24/1981CA1096438A1 Stepping motor control circuit
02/10/1981CA1095584A1 Stepping motor control circuit
01/1981
01/21/1981EP0022457A1 Method of, and circuit for, controlling the detenting of multiphase stepper motors
01/20/1981US4246518 Brushless direct current motor
01/14/1981EP0022270A1 Position detector for a stepping motor
01/07/1981EP0021320A1 Operation detector for a stepping motor
01/07/1981EP0020991A1 Optically functioning encoder unit for controlling a bidirectional movement and its use in controlling stepping motors
01/06/1981US4244039 Electro-mechanical watch
12/1980
12/30/1980US4242624 Direct current stepper motor with a permanent magnet rotor and electronic commutation device
12/30/1980US4242623 Miniature electric stepping motor
12/23/1980US4241434 Stepping motor mechanism for an electronic watch
12/23/1980US4241433 Electronic watch
12/23/1980US4241365 Magnetic video recording and reproducing device
12/23/1980US4241301 Circuit arrangement for the generation of stepping pulses for the acceleration of a stepper motor
11/1980
11/13/1980WO1980002492A1 Pulse motor driving apparatus for automatic testing system
11/13/1980WO1980002461A1 Automatic testing system for printed circuit boards
10/1980
10/21/1980US4229685 Electrical circuit for regulating the current in the windings of certain step motors
10/21/1980US4229682 Electronically commutating motor
10/14/1980US4228387 Variable reluctance stepper motor drive and method of operation as a DC brushless motor
10/07/1980US4227135 Step motor driving circuit
09/1980
09/16/1980US4223260 Stepper motor drive apparatus
09/16/1980CA1085910A1 Open loop motor stabilization method and circuit
09/02/1980US4221001 Shift register suitable for controlling the energization of a multiwinding motor
09/02/1980US4220904 Stabilizing circuit for stepping motors with unipolar self-decay current circuitry
08/1980
08/26/1980US4219767 System and method of minimizing velocity fluctuations in a synchronous motor shaft
08/19/1980US4218643 Braking system for loaded stepping motor
08/19/1980US4218642 Stepper motor rate control
08/19/1980US4217751 Electronic timepiece
07/1980
07/29/1980US4215302 Control system for stepping motors, a method of operating stepping motors, and a method for selecting current patterns for stepping motors
07/22/1980US4214194 Timing circuitry and method for a stepping motor
07/15/1980US4212156 Step motor control mechanism for electronic timepiece
07/09/1980EP0012885A1 Control apparatus for an electrical stepping motor
07/08/1980CA1081315A1 Step motor velocity control
07/01/1980US4209971 Electronic timepiece
06/1980
06/24/1980US4208868 Control device for a step-by-step motor
06/17/1980US4208623 Chopping power supply for a bifilar stepping motor
06/03/1980CA1078918A1 Stepping motor closed loop constant velocity control system
05/1980
05/28/1980EP0011260A1 Method for positioning a movable body
05/27/1980US4205262 Electronic watch
05/27/1980US4204397 Electronic timepiece
05/06/1980CA1077126A1 Stepping motor using extended drive pulses
04/1980
04/29/1980US4199932 Electronic timepiece with mixed time setting
03/1980
03/25/1980CA1074394A2 Stepping motor using extended drive pulses and method
03/25/1980CA1074393A2 Stepping motor using extended drive pulses and method
03/11/1980CA1073522A1 Stepper motor circuit with active damping
02/1980
02/05/1980US4187455 Stepper motor feedback in position servo loop
10/1979
10/30/1979US4172990 Control system for inductively controlled multi-phase motor
10/30/1979CA1065476A1 Magnetic recording and reproducing device
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