| Patents for H02P 7 - Arrangements for regulating or controlling the speed or torque of electric dc-motors (10,217) |
|---|
| 12/19/1978 | CA1044757A1 Series parallel transition for power supply |
| 12/12/1978 | US4129810 Switching motor control system |
| 12/12/1978 | US4129809 Power factor corrected dual converter motor drive |
| 12/12/1978 | CA1044350A1 Maximization of traction force for rail-vehicles by reducing motor oscillations responses to slipping |
| 11/21/1978 | CA1042978A1 Over-speed preventing apparatus for dc motor |
| 11/14/1978 | CA1042577A1 Control system for a transportation system |
| 11/14/1978 | CA1042507A1 Pulse control system power circuit |
| 11/07/1978 | US4124811 Circuit for bi-directionally powering a motor |
| 10/31/1978 | US4123693 Transit vehicle generated voltage control apparatus and method |
| 10/24/1978 | US4122517 Thyristor control method for thyristor AC-DC converter |
| 10/17/1978 | US4121142 Full-wave bidirectional DC motor drive circuit |
| 10/17/1978 | US4121141 D.C. motor speed control circuitry |
| 10/17/1978 | CA1040762A1 Transportation system with motor field control |
| 10/10/1978 | US4119899 Motor control means for power driven window |
| 10/10/1978 | US4119898 Pulse controllers |
| 10/10/1978 | CA1040257A1 Dc motor regulator |
| 10/03/1978 | US4118658 Control circuit for shuttle car |
| 10/03/1978 | CA1039835A1 Motor control systems |
| 09/19/1978 | US4115831 Velocity detecting apparatus insensitive to noise |
| 09/12/1978 | US4114075 Rotation control system |
| 09/12/1978 | US4114074 Device for electronic direction control of trolling motors |
| 09/12/1978 | US4112885 Throttle valve control system for an internal combustion engine |
| 09/05/1978 | US4112340 Control devices |
| 09/05/1978 | US4112338 Wiring arrangement for blower motors of an air conditioner |
| 09/05/1978 | CA1038064A1 Time-ratio control having bidirectional speed potentiometer |
| 08/29/1978 | CA1037558A1 D. c. motor control having gating control of a full-wave rectifier system |
| 08/22/1978 | US4109184 Method and apparatus for providing a stable, high gain servo system |
| 08/22/1978 | CA1037116A1 D-c voltage control |
| 08/22/1978 | CA1037114A1 Commutating oscillator and current-limiter for solid state switching circuits |
| 08/15/1978 | CA1036694A1 Feedback field control for an electric vehicle |
| 08/08/1978 | US4105936 Variable speed tape transport apparatus |
| 08/01/1978 | US4104570 Digital control system for motors |
| 07/11/1978 | USRE29695 Outboard motor with speed regulator for DC permanent magnet motor |
| 07/04/1978 | US4099111 Control apparatus for DC motor |
| 06/20/1978 | US4096423 Direct current motor chopper propulsion system |
| 06/13/1978 | US4095155 Direction reversing direct current motors and their control |
| 06/13/1978 | US4094594 Movie-camera with automatic fade-out shutoff |
| 06/06/1978 | US4093901 DC Motor speed control circuit |
| 05/23/1978 | US4091314 Circuit apparatus for enabling use of an a-c tachometer as the speed signal from a bi-directional d-c machine |
| 05/16/1978 | US4090116 Closed loop digital control system and method for motor control |
| 05/16/1978 | US4090115 Transit vehicle chopper control apparatus and method |
| 05/16/1978 | US4090114 Safety features for electric vehicle control |
| 05/09/1978 | US4088933 DC Motor phase control system |
| 05/09/1978 | US4088852 Motor speed control switch assembly |
| 05/02/1978 | US4086983 Elevator control system |
| 04/25/1978 | US4086570 Controlled DC current supply device with open circuit detecting means |
| 04/25/1978 | US4085823 Elevator system |
| 04/25/1978 | US4085692 Motor control apparatus for electrically-driven sewing machine |
| 04/18/1978 | US4085356 Speed control system for model railroads |
| 04/11/1978 | US4084119 Chopper control system |
| 04/04/1978 | US4082988 Electric power plant for motor driven vehicles |
| 03/28/1978 | US4081729 Low voltage photoswitch |
| 03/14/1978 | US4079301 D.C. motor control |
| 03/07/1978 | US4078194 Arrangement for controlling the speed of a motor |
| 02/28/1978 | US4075970 Speed selection for a direct current permanent magnet motor |
| 02/21/1978 | US4075541 Direct current motor control device for use in battery automobiles |
| 02/14/1978 | US4074175 Inductive load current measuring circuit |
| 02/07/1978 | US4072883 Bi-directional motor drive servo |
| 01/24/1978 | US4070610 Proportional motor circuit |
| 01/10/1978 | US4068293 SCR d.c. interrupter |
| 01/03/1978 | US4066945 Linear driving circuit for a d.c. motor with current feedback |
| 01/03/1978 | US4066940 Electrical control apparatus |
| 01/03/1978 | US4066939 Control circuits for electrically driven vehicles |
| 01/03/1978 | US4066934 Motor speed controller |
| 01/03/1978 | US4066933 Static switching device for two direct current machines |
| 12/27/1977 | US4065074 Reel servo control system |
| 12/20/1977 | US4064443 Control system for D.C. motor |
| 12/13/1977 | US4063146 Digital firing control for a converter |
| 12/13/1977 | US4063141 Linear D.C. drive circuit |
| 12/13/1977 | US4063138 Drive circuit for pulse synchronized motor |
| 12/06/1977 | US4061949 Earth excavator including apparatus for stabilizing performance by compensating for changes in temperature |
| 11/08/1977 | US4057752 Firing control oscillator for a solid state switch |
| 10/25/1977 | US4055789 Battery-operated motor with back EMF charging |
| 10/18/1977 | US4054821 D-C motor drive system with field current flow reversal upon transition between motoring and retarding modes |
| 10/18/1977 | US4054819 Motor angular velocity monitor circuit |
| 10/04/1977 | US4052647 Optimum battery reconnect for a field controlled electric vehicle |
| 10/04/1977 | US4052642 Apparatus for controlling controlled systems with dead time |
| 10/04/1977 | US4052625 Motor speed control circuit with overload protection |
| 09/20/1977 | US4049998 Control circuit for an electrically driven vehicle |
| 09/13/1977 | US4048550 Flux corrective control apparatus for motor drives |
| 09/13/1977 | US4048549 Circuit for eliminating current noises from d.c. motor |
| 09/06/1977 | US4047080 Common bus parallel speed regulator system |
| 08/30/1977 | US4045716 Magnetic field systems employing a superconducting d.c. field coil |
| 08/23/1977 | US4044287 Circuit for energizing the electromotor driving a blower |
| 08/16/1977 | US4042865 Separately excited D.C. motors |
| 08/16/1977 | US4042864 AC-DC Traction drive control system |
| 08/09/1977 | US4041362 Motor control system |
| 08/02/1977 | US4039915 D-c commutator-type dynamo electric machine with electronic control |
| 08/02/1977 | US4039853 Magnetizing device for permanent magnet motor for electric vehicle |
| 07/19/1977 | US4037145 Multiple frequency chopper control |
| 07/19/1977 | US4037144 Control device for use in shunt motor |
| 07/19/1977 | US4037143 Means in a motor-driven rail-vehicle |
| 07/12/1977 | US4035704 Field weakening sensor circuit |
| 07/12/1977 | US4035703 Current circuit arrangement for reducing the switch-on power dissipation of a power transistor |
| 07/05/1977 | US4034274 Speed control device for direct current motors |
| 06/28/1977 | US4032833 Chopper control device |
| 06/28/1977 | US4032825 Commutating oscillator and current-limiter for solid state switching circuits |
| 06/21/1977 | US4031440 Transient load damping circuit for excavator |
| 06/21/1977 | US4031439 Over-speed preventing apparatus for DC motor |
| 06/21/1977 | US4030570 Elevator system |