| Patents for H02P 27 - Arrangements or methods for the control of ac-motors characterised by the kind of supply voltage (13,284) |
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| 10/10/1978 | US4119893 Circuit for forming an electrical quantity which is proportional to a flux component in a rotating field machine |
| 09/26/1978 | US4117384 Tachogenerator processing circuits and motor speed control systems including such circuits |
| 09/26/1978 | US4117364 Voltage waveform synthesizer and a system that includes the same |
| 09/26/1978 | US4117349 Solid state alternating current switching device |
| 09/05/1978 | US4112339 Measurement of pulsating torque in a current source inverter motor drive |
| 08/29/1978 | US4110671 Speed variator for a universal electric motor |
| 08/29/1978 | CA1037557A1 Control of rotary-field electric machines |
| 08/15/1978 | CA1036664A1 Solid state alternating current switching device |
| 08/08/1978 | US4106069 Protection arrangement for a brushless synchronous machine |
| 07/18/1978 | US4101831 Load monitoring apparatus and method |
| 07/18/1978 | US4101819 Three phase controlling system |
| 07/11/1978 | US4100467 Type of single phase induction motor assembly |
| 07/11/1978 | US4100465 Turntable speed control system |
| 07/04/1978 | US4099109 Digital apparatus for synthesizing pulse width modulated waveforms and digital pulse width modulated control system |
| 07/04/1978 | US4099108 Variable speed control apparatus for induction motor |
| 07/04/1978 | US4099107 Apparatus for synchronizing AC-motors |
| 06/20/1978 | US4096422 Motor control system |
| 06/13/1978 | US4095150 Two-phase asynchronous motor |
| 06/06/1978 | US4093898 Control system for regulating the speed of an electric motor |
| 05/23/1978 | US4091294 A.C. motor control apparatus and method |
| 05/09/1978 | US4088934 Means for stabilizing an a-c electric motor drive system |
| 04/11/1978 | US4084220 Power converter |
| 04/11/1978 | US4083431 Elevator control apparatus |
| 03/21/1978 | US4080554 Variable frequency static motor drive |
| 03/14/1978 | US4078393 Control system for controlling the operation of a three-phase load |
| 03/07/1978 | US4078198 Apparatus for repeating the same process |
| 03/07/1978 | US4078192 Synthesizer for multiphase waveforms |
| 03/07/1978 | US4078191 Control system for regulating the torque and speed of an electric motor |
| 03/07/1978 | US4078190 Control system for regulating the speed of an electric motor including static frequency detector for speed detection and regulation |
| 03/07/1978 | US4078189 Control system for regulating the torque and speed of an electric motor including static frequency detector for speed detection and regulation |
| 02/14/1978 | US4074174 Controlling apparatus for asynchronous motors with wound rotor |
| 02/07/1978 | US4072882 Frequency current converter for energizing an AC machine |
| 01/03/1978 | US4066938 Input current modulation to reduce torque pulsations in controlled current inverter drives |
| 12/27/1977 | US4065804 Electronic control system for motors and the like |
| 12/13/1977 | US4063135 Electric motor having controlled magnetic flux density |
| 11/15/1977 | US4058755 Kramer system utilizing a commutatorless motor |
| 10/18/1977 | US4054818 Solid state current source polyphase inverter induction motor drive |
| 10/04/1977 | US4052651 Elevator speed control system |
| 10/04/1977 | US4052648 Power factor control system for ac induction motors |
| 09/27/1977 | US4051418 Three phase a.c. motor drive system |
| 09/06/1977 | US4047083 Adjustable speed A-C motor drive with smooth transition between operational modes and with reduced harmonic distortion |
| 08/09/1977 | US4041361 Constant torque induction motor drive system |
| 08/09/1977 | US4041360 Control circuit for an electric motor |
| 08/02/1977 | US4040081 Alternating current control circuits |
| 08/02/1977 | US4039914 Dynamic braking in controlled current motor drive systems |
| 06/21/1977 | USRE29275 Motor control system |
| 06/07/1977 | US4028599 Method of controlling an A.C. motor |
| 05/24/1977 | US4025834 Negative sequence compensation for polyphase equipment |
| 05/17/1977 | US4024445 Circuit for producing for a feedback motor speed control loop an error signal immune to a change in the source voltage |
| 05/17/1977 | US4024444 Drive circuit for induction motor used in air conditioning system of a railway vehicle |
| 05/10/1977 | US4023083 Torque regulating induction motor system |
| 04/26/1977 | US4020360 Inverter control system |
| 03/29/1977 | US4015173 Support for mounting the electronic components of a single phase unit for an inverter |
| 03/08/1977 | US4011489 Apparatus for regulating magnetic flux in an AC motor |
| 02/22/1977 | US4009427 Adaptive control system for an alternating-current motor |
| 02/15/1977 | US4008421 Methods and apparatus for speed-control of induction motors |
| 02/01/1977 | US4006367 Solid state alternating current switching device |
| 01/18/1977 | US4004203 Drive systems using a. c. motors |
| 01/11/1977 | US4002958 AC output power control system |
| 01/04/1977 | US4001660 Regulating the torque of an induction motor |
| 12/14/1976 | US3997825 Method and apparatus for controlling synchronous motor |
| 11/16/1976 | US3992657 AC feed control system |
| 11/09/1976 | US3991354 Variable speed drive for induction motor |
| 11/02/1976 | US3989991 Method and circuit for the derivation of an analog slip frequency signal of an induction motor in a tachometerless motor drive |
| 10/12/1976 | US3986100 DC-voltage supply means for an inverter |
| 10/12/1976 | US3986088 A. C. motor control apparatus and method |
| 10/12/1976 | US3986087 A.C. motor control apparatus and method |
| 09/28/1976 | US3983463 Method and apparatus for controlling the speed of induction motors |
| 09/28/1976 | US3983321 Switching circuit utilizing a base storage characteristics of a transistor for use in a facsimile transceiver and the like |
| 08/31/1976 | US3978383 Speed controls for electric motors |
| 08/31/1976 | US3978381 Emergency operation of a static scherbius device |
| 08/03/1976 | US3973175 Induction motor speed control apparatus |
| 07/27/1976 | US3971972 Transistor inverter motor drive having voltage boost at low speeds |
| 06/29/1976 | US3967173 Transistor bridge inverter motor drive having reduced harmonics |
| 06/29/1976 | US3967172 Control circuit, refrigeration system, and method of controlling speed of an alternating current motor |
| 06/08/1976 | US3962613 Polyphase AC motor control |
| 05/18/1976 | US3958174 Modulated induction generator |
| 03/23/1976 | US3946293 Thyristor control system |
| 03/09/1976 | US3943429 Method and apparatus for operating an inverter consisting of two sub-inverters |
| 03/02/1976 | US3942091 Method and apparatus for operating a converter fed rotating field machine |
| 02/24/1976 | US3940669 AC motor control system |
| 02/17/1976 | US3939387 Variable frequency power converter for ac motor drive |
| 01/27/1976 | US3935518 Method of eliminating self oscillations of an induction motor powered from a frequency changer and means for effecting same |
| 01/20/1976 | US3934184 Arrangement for regulating the speed of an asynchronous motor |