| 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) |
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| 12/27/1979 | WO1979001132A1 Variable reluctance motor systems |
| 12/25/1979 | US4180766 Reciprocating linear drive mechanism |
| 12/18/1979 | CA1068330A1 Control and protection of brushless synchronous motors |
| 12/11/1979 | CA1067955A1 Variable speed electronic motor and the like |
| 11/27/1979 | CA1067140A1 Universal electric motor speed control |
| 10/30/1979 | US4172989 Speed control device for a sewing machine |
| 10/02/1979 | CA1063723A1 Device for writing and/or reproducing information in respectively from a rotating disk-shaped record carrier |
| 09/25/1979 | CA1063167A2 Control circuit for variable reluctance motor |
| 08/14/1979 | US4164696 Stepping motor excitation |
| 07/31/1979 | US4163181 Variable-speed electromotive drive, especially for household appliances such as dough kneaders |
| 07/11/1979 | EP0002697A1 Sprung mass oscillation system |
| 07/10/1979 | US4160939 Motor speed control system |
| 07/10/1979 | US4160938 Motor drive apparatus |
| 06/26/1979 | US4159002 Sewing machine input signal waveshaping |
| 06/19/1979 | US4158796 Speed setting and control system for universal motors |
| 06/05/1979 | US4157491 Speed control system for a universal a-c, d-c motor connected to an a-c network |
| 06/05/1979 | CA1056009A1 Control circuit for variable reluctance motor |
| 05/22/1979 | CA1055115A1 Alternating current control circuits |
| 05/01/1979 | US4152630 Multi-phase motor |
| 04/24/1979 | US4150634 Integrated motor controller for sewing machines |
| 03/27/1979 | US4146921 Power control or conversion apparatus |
| 03/20/1979 | US4145725 Electromagnetic actuator |
| 03/20/1979 | US4145645 Speed control means for squirrel-cage motor |
| 03/13/1979 | CA1050609A1 Speed control means for ac motor |
| 03/06/1979 | US4143311 Hysteresis synchronous motor rate servo system |
| 03/06/1979 | US4143308 Control for variable reluctance motors |
| 03/06/1979 | CA1050104A1 Controlled post-synchronizing on brushless synchronous motors |
| 02/27/1979 | US4142138 Motor control |
| 02/20/1979 | US4140951 Mining machine |
| 02/20/1979 | CA1049164A1 Elevator motor control system for a.c. induction motor |
| 01/30/1979 | US4137491 Stepper motor with analog positioning |
| 01/09/1979 | US4134055 Inductor type synchronous motor driving system |
| 01/09/1979 | US4134038 Speed control for a universal electric motor |
| 01/02/1979 | US4132932 Balanced split-phase electric motor |
| 12/05/1978 | US4128792 Control and protection of brushless synchronous motors |
| 12/05/1978 | US4128791 Phase shift circuit for synchronous motor |
| 11/14/1978 | US4125796 Control apparatus for use in a synchronous machine |
| 09/26/1978 | US4117384 Tachogenerator processing circuits and motor speed control systems including such circuits |
| 09/26/1978 | CA1039372A1 Circuit arrangement for a trackbound propulsion vehicle |
| 08/29/1978 | US4110671 Speed variator for a universal electric motor |
| 08/29/1978 | US4110669 Synchronous machine control system |
| 08/15/1978 | US4107584 Current limiting device for an a.c. motor |
| 07/11/1978 | US4100467 Type of single phase induction motor assembly |
| 07/04/1978 | US4099109 Digital apparatus for synthesizing pulse width modulated waveforms and digital pulse width modulated control system |
| 07/04/1978 | US4099103 Apparatus for controlling the rotors of synchronous motors |
| 06/13/1978 | US4095149 Optimized electric motor having controlled magnetic flux density |
| 06/06/1978 | US4093905 Stepping motor using extended drive pulses |
| 05/09/1978 | US4088932 Control system for commutatorless motor |
| 04/18/1978 | US4085355 Variable-speed regenerative brushless electric motor and controller system |
| 03/14/1978 | US4079278 Hybrid field permanent magnet motor |
| 03/07/1978 | US4078198 Apparatus for repeating the same process |
| 01/24/1978 | US4070586 Electric vacuum cleaning and agitator motor control system |
| 01/17/1978 | US4069446 Speed control means for AC motor |
| 01/17/1978 | US4068741 Elevator motor control system for a.c. induction motor |
| 01/03/1978 | US4066940 Electrical control apparatus |
| 12/27/1977 | US4065804 Electronic control system for motors and the like |
| 12/27/1977 | US4065705 SCR controlled universal motor |
| 12/27/1977 | US4065704 Static speed control circuit for polyphase induction motors |
| 12/13/1977 | US4063135 Electric motor having controlled magnetic flux density |
| 11/29/1977 | US4060753 Control system for commutatorless motor |
| 10/11/1977 | US4053817 Electromagnetic vibrator |
| 10/04/1977 | US4052648 Power factor control system for ac induction motors |
| 08/02/1977 | US4040081 Alternating current control circuits |
| 08/02/1977 | US4039913 Universal electric motor speed control |
| 08/02/1977 | US4039909 Variable speed electronic motor and the like |
| 08/02/1977 | US4039907 Thrust control circuit |
| 07/26/1977 | US4038589 Controlled post-synchronizing on brushless synchronous motors |
| 05/17/1977 | US4024443 A.C.-powered, commutated electric motor |
| 04/26/1977 | US4020402 AC switch speed control for two phase motors |
| 03/22/1977 | US4013014 Circuit arrangement for a track-bound propulsion vehicle |
| 03/15/1977 | US4012679 Method and apparatus for controlling the operation of synchronous motor |
| 02/22/1977 | US4009427 Adaptive control system for an alternating-current motor |
| 01/11/1977 | US4002959 Motor control system, particularly to reduce idling speed |
| 12/14/1976 | US3997825 Method and apparatus for controlling synchronous motor |
| 11/09/1976 | US3991351 Brushless A.C. synchronous motors |
| 10/26/1976 | US3988685 Electronic frequency sensor |
| 10/26/1976 | US3988656 Motor speed control for power tool |
| 10/26/1976 | US3988653 Reduction of hunting in synchronous motor |
| 09/14/1976 | US3980933 Control circuit for variable reluctance motor |
| 08/03/1976 | USRE28920 Remote control for vacuum cleaner motor |
| 07/13/1976 | US3969659 Alternating current motor system |
| 07/13/1976 | US3969574 Tubular player arm for an optical recording and reproducing device with drive coil and tachogenerator coil on other end |
| 05/11/1976 | US3956688 Remote control phase shift circuit for thyristor |
| 05/11/1976 | US3956679 Brushless A.C. synchronous motors |
| 04/06/1976 | US3949283 Control system for brushless motor |
| 03/09/1976 | US3943421 Food processing control apparatus |
| 03/02/1976 | US3942086 Solid state motor control system |
| 02/24/1976 | US3940669 AC motor control system |
| 02/10/1976 | US3937431 Postioning apparatus for tracked transport vehicles with linear motor propulsion |
| 01/27/1976 | US3935522 Control device for the electric fan |
| 01/20/1976 | US3934184 Arrangement for regulating the speed of an asynchronous motor |