| Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487) |
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| 06/27/1978 | US4097786 Limit control apparatus |
| 06/13/1978 | US4095149 Optimized electric motor having controlled magnetic flux density |
| 05/23/1978 | US4091294 A.C. motor control apparatus and method |
| 05/16/1978 | US4090116 Closed loop digital control system and method for motor control |
| 05/09/1978 | US4088935 Stabilizing scheme for an a-c electric motor drive system |
| 04/25/1978 | US4086520 Speed and phase control system |
| 04/18/1978 | US4085373 Frequency-to-voltage transducer for speed governor systems or the like |
| 04/18/1978 | US4085355 Variable-speed regenerative brushless electric motor and controller system |
| 04/11/1978 | US4084120 Stepper motor valve actuator control apparatus |
| 03/28/1978 | US4081728 DC motor control circuit |
| 03/21/1978 | US4080555 Drive control circuit for d.c. motor |
| 03/14/1978 | US4079302 Methods and apparatus for correcting servo signals |
| 03/14/1978 | US4079299 Positioning control means for motor driven rotary tap changer |
| 03/14/1978 | US4079296 Variable speed AC motor control circuit |
| 02/14/1978 | US4074174 Controlling apparatus for asynchronous motors with wound rotor |
| 02/14/1978 | US4074128 Photoelectric signal generating circuits |
| 02/07/1978 | US4072884 Brushless phase locked servo drive |
| 01/24/1978 | US4070609 Automatic control system |
| 01/03/1978 | US4066938 Input current modulation to reduce torque pulsations in controlled current inverter drives |
| 01/03/1978 | US4066876 Digital speed control system |
| 01/03/1978 | US4066874 Digital speed control system |
| 12/13/1977 | US4063304 Method of controlling the rotation of a rotary body and apparatus thereof |
| 12/13/1977 | US4063138 Drive circuit for pulse synchronized motor |
| 12/06/1977 | US4061950 Pulse generating device for regulating the rotational speed of a body |
| 11/15/1977 | US4058755 Kramer system utilizing a commutatorless motor |
| 10/04/1977 | US4052676 Digital-analog frequency error signaling |
| 10/04/1977 | US4052649 Hand held variable speed drill motor and control system therefor |
| 10/04/1977 | US4052648 Power factor control system for ac induction motors |
| 10/04/1977 | US4052646 Speed control system for a corrugator |
| 09/06/1977 | US4047231 High stability digital head servo for video recorders |
| 08/16/1977 | US4042862 Power control for variable speed induction motors |
| 08/16/1977 | US4042069 AC Elevator control system |
| 08/09/1977 | US4041361 Constant torque induction motor drive system |
| 08/02/1977 | US4039914 Dynamic braking in controlled current motor drive systems |
| 06/28/1977 | US4032826 Circuit arrangement for phase-alignment of a servo drive for a rotary system |
| 06/14/1977 | US4030007 Direct current braking means for wound rotor motor |
| 06/14/1977 | US4030006 Speed controllable drive for an asynchronous motor |
| 05/24/1977 | US4025830 Motor control and web material drive system |
| 05/24/1977 | US4025762 Reference signal circuit |
| 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 |
| 05/10/1977 | US4023080 Phase synchronizing circuit |
| 04/19/1977 | US4019105 Controlled current induction motor drive |
| 04/12/1977 | US4017776 Reversible shaded pole motor and control arrangement therefor |
| 04/05/1977 | US4016467 Servodrive apparatus for driving the postage printing drum in a postage meter |
| 03/29/1977 | US4015180 Speed regulating devices for rotary machines or the like |
| 02/22/1977 | US4009427 Adaptive control system for an alternating-current motor |
| 02/15/1977 | US4008425 Motor servo system with multiplier means to drive and servo the motor |
| 02/15/1977 | US4008424 Bidirectional speed control system |
| 02/08/1977 | US4007408 Apparatus for synchronization of a motor |
| 01/18/1977 | US4004205 Hybrid servo control system |
| 01/18/1977 | US4004203 Drive systems using a. c. motors |
| 01/11/1977 | US4002962 Phase locked servo loop circuit |
| 01/04/1977 | US4001886 Apparatus with headwheel servo for recording and playing back video information |
| 11/23/1976 | US3993940 Latching system for two-phase reversible 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 |
| 11/02/1976 | US3989361 Film speed control for sound motion picture projector |
| 10/26/1976 | US3988685 Electronic frequency sensor |
| 10/19/1976 | US3986788 Prime mover speed control system |
| 10/12/1976 | US3986089 Control apparatus for electric motors |
| 09/28/1976 | US3983316 Turntable speed control system |
| 08/31/1976 | US3978381 Emergency operation of a static scherbius device |
| 08/10/1976 | US3974428 Wide range, high accuracy, electronically programmed speed control system |
| 08/10/1976 | US3974422 Circuit arrangement for overload protection of a drive motor |
| 08/03/1976 | US3973175 Induction motor speed control apparatus |
| 07/27/1976 | US3971974 Apparatus for controlling the synchronous drive for direct-current motors |
| 07/20/1976 | US3970907 Pulsating torque apparatus and method |
| 07/20/1976 | US3970897 Detector and apparatus incorporating the same for detecting phase-asymmetry and protecting three-phase motors against dangerous operating conditions |
| 07/06/1976 | US3968352 Torque control system for reaction wheel assemblies and the like |
| 07/06/1976 | US3967603 Speed sensitive switching device |
| 06/29/1976 | US3967177 Photocomposition machine |
| 06/08/1976 | US3962614 Method for controlling the output condition of a self excited alternating current induction motor |
| 05/04/1976 | US3954163 High speed printer with intermittent print wheel and carriage movement |
| 04/27/1976 | US3953776 Digital motor speed control circuit |
| 04/20/1976 | US3952237 Rotary body control apparatus |
| 04/20/1976 | US3952236 Vehicle speed regulation system |
| 04/13/1976 | US3950682 Digital dc motor velocity control system |
| 04/06/1976 | US3948357 Transportation system with decelerating control |
| 03/23/1976 | US3946293 Thyristor control system |
| 03/23/1976 | US3946284 Circuit for controlling damp shock loading |
| 03/02/1976 | US3942084 Video tape recorder method and apparatus |
| 02/03/1976 | US3936710 Synchronous drive control system for dc motor |
| 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 | US3934269 Apparatus for controlling the rotation of a rotating body in a recording and/or reproducing apparatus |
| 01/20/1976 | US3934182 Synchronizing apparatus |
| 01/13/1976 | US3932771 Control for three phase A.C. motor |
| 01/06/1976 | US3931556 System for driving a direct-current motor in synchronism with an external signal |
| 01/06/1976 | US3931555 Acceleration control system for a d-c motor |