| 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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| 03/29/1989 | EP0308517A1 Vaccum cleaner |
| 03/29/1989 | EP0308421A1 Process and apparatus to control synchronous motors, servomotors in particular |
| 03/22/1989 | EP0307724A1 Motor speed control circuit |
| 03/21/1989 | US4814964 Variable speed a-c drive |
| 03/21/1989 | US4813443 Method for controllably positioning a solenoid plunger |
| 03/08/1989 | CN1031631A Method of controling electric motor for air-blower of air conditioner |
| 03/01/1989 | EP0304574A1 Power supply device for a variety of connectable tools |
| 02/28/1989 | US4808902 Control apparatus for brush-less motor |
| 02/28/1989 | US4808901 Control apparatus for linear motor |
| 02/28/1989 | US4808078 Pump control system for instantly reversing the drive motor |
| 02/23/1989 | WO1989001725A1 Apparatus for producing controlled movement |
| 02/23/1989 | DE3726552A1 Converter/machine systems having digital control (regulation) |
| 02/21/1989 | US4806838 A.C. induction motor energy conserving power control method and apparatus |
| 02/21/1989 | CA1250346A1 Speed control circuit for ac motor |
| 02/14/1989 | US4804902 Linear, low EMI/RFE fan control circuit |
| 02/14/1989 | US4804900 Control apparatus for synchronous motors |
| 02/14/1989 | US4804067 Inverter control apparatus for elevator motor |
| 02/09/1989 | WO1989001260A1 Switched reluctance motor control system |
| 02/09/1989 | DE3725514A1 Commutator-less DC machine control-drive - using control-regulation unit to generate square-wave current blocks position amplitude and duration and set-point signals |
| 02/01/1989 | EP0301036A1 Control system for a variable-reluctance motor, and method. |
| 01/31/1989 | US4800818 Linear motor-driven conveyor means |
| 01/11/1989 | EP0298278A1 Power supply device connected by a junction cable to at least one electrical tool |
| 01/10/1989 | US4797765 Thin film magnetic head having solder-bonded protective plate |
| 01/04/1989 | EP0297642A1 Drive arrangement and motor-energising system for use in the arrangement |
| 01/03/1989 | US4796112 Actuator access control system for a magnetic head using trapezoidal drive current |
| 12/29/1988 | WO1988010188A1 System for using synchronous secondaries of a linear motor to biaxially draw plastic films |
| 12/27/1988 | US4794311 Numerical control system |
| 12/27/1988 | US4794310 Phase angle control circuit for motors |
| 12/22/1988 | DE3728983C1 Single-phase asynchronous motor |
| 12/14/1988 | CN88103187A Control apparatus for brush-less motor |
| 12/13/1988 | CA1246616A1 Process for the production of butane-1,4-diol |
| 12/01/1988 | WO1988009582A1 Motor control and power systems and methods of operation thereof |
| 12/01/1988 | DE3810589A1 Single-knob (button) operation electronics controller |
| 11/29/1988 | US4788485 Apparatus for controlling electric motor |
| 11/17/1988 | WO1988009082A1 Rectifier type electric drive |
| 11/17/1988 | EP0290480A1 Power circuit for switching the number of poles on the rotor of synchronous machines by using rotative diodes |
| 11/15/1988 | US4784580 Airflow control system |
| 11/02/1988 | EP0289362A2 A control system for brushless motors |
| 11/02/1988 | EP0289075A2 Reluctance electric machine |
| 11/02/1988 | EP0139006B1 System for controlling synchronous motor |
| 11/01/1988 | CA1244077A1 Load-commutated inverter for operating synchronous motor |
| 10/27/1988 | EP0301036A4 Control system for a variable-reluctance motor, and method. |
| 10/26/1988 | EP0287607A1 A motor energizing circuit. |
| 10/25/1988 | US4780654 Control apparatus for drilling machine |
| 10/12/1988 | EP0285637A1 A motor energizing circuit. |
| 10/11/1988 | US4777419 Control apparatus and method for operating a switched reluctance motor |
| 10/11/1988 | US4777414 Driving arrangement for a drive motor |
| 10/06/1988 | WO1988007347A1 Vaccum cleaner |
| 10/04/1988 | US4774899 Speed setting device for an electric sewing machine |
| 09/28/1988 | EP0283954A2 Compressor drive system and air conditioner using the same |
| 09/21/1988 | EP0282757A1 Driving device comprising a converter and a synchronous motor with permanent-magnet excitation fed by said converter |
| 09/20/1988 | US4772839 Rotor position estimator for switched reluctance motor |
| 09/20/1988 | US4772833 Feedback control system for producing pulse width modulation control signal |
| 09/20/1988 | US4772830 Method and apparatus for controlling torque of a servomotor |
| 09/20/1988 | US4772828 Control device supplying optimum power to oscillating drive motor for resonant-piston type compressor unit |
| 09/13/1988 | US4771223 Motor speed control system |
| 09/07/1988 | CN87100946A Gating speed regulation method and apparatus thereof |
| 08/31/1988 | EP0280146A1 Method and apparatus for asynchronous motor's speed regulation using strobe control |
| 08/31/1988 | EP0136357B1 Electric vacuum cleaner |
| 08/31/1988 | CN88100823A Motor controlling system |
| 08/24/1988 | EP0279428A2 Electric motor control system |
| 08/11/1988 | DE3702952A1 Method and arrangement for regulating a fan drive |
| 08/09/1988 | US4763056 Power supply systems for reluctance motors |
| 08/09/1988 | US4762463 Fan having speed indicator |
| 08/03/1988 | EP0276625A2 Control apparatus and method for operating a switched reluctance motor |
| 08/02/1988 | US4761599 Motor controller |
| 08/02/1988 | US4761591 RPM regulation of an electromotor |
| 08/02/1988 | US4761590 Electric motor |
| 07/28/1988 | DE3806086A1 Single-button operation electronics controller |
| 07/26/1988 | US4760316 Method for controlling brushless d.c. motors and apparatus for carrying out the method |
| 07/19/1988 | US4758771 Apparatus for driving AC motor |
| 07/06/1988 | EP0273052A1 Device for detecting the rotational position of rotor of motor |
| 06/14/1988 | US4751451 Fan motor control system |
| 06/14/1988 | US4751437 Wide bandwidth linear motor system |
| 06/08/1988 | EP0142563B1 System of controlling synchronous motor |
| 05/11/1988 | EP0266835A1 Control device for controlling the power supply to an oscillating motor for driving a compressor unit of the resonant-piston type and compressor unit of the resonant-piston type provided with such a control device |
| 05/11/1988 | CN87107490A Control device for controlling power supply to oscillating motor for driving compressor unit of resonant-piston type and compressor unit of resonant-piston type provided with such control device |
| 05/10/1988 | US4743825 Synchronous motors and a control system thereof |
| 05/03/1988 | CA1236183A1 Lim secondary reactance compensation and thrust control |
| 04/26/1988 | CA1235761A1 Contactless powering of lim vehicle electrical system by recovery of lim slip power |
| 04/26/1988 | CA1235732A1 Power supply apparatus for linear motor |
| 04/21/1988 | WO1988002952A1 A motor energizing circuit |
| 04/21/1988 | WO1988002951A1 A motor energizing circuit |
| 04/19/1988 | US4739240 Commutator for switched reluctance drive |
| 04/19/1988 | US4738211 Sewing machine control device |
| 04/07/1988 | WO1988002574A1 Control system for a variable-reluctance motor, and method |
| 03/30/1988 | EP0261540A1 Drive assembly with a drive motor |
| 03/29/1988 | US4734633 Speed control apparatus for a synchronous motor |
| 03/29/1988 | US4734012 Blower speed control |
| 03/24/1988 | DE3631298A1 Reversible pole three-phase motor for underground operation, especially a squirrel-cage rotor motor |
| 03/15/1988 | US4731571 Control for stabilizing the alignment position of the rotor of a synchronous motor |
| 03/15/1988 | US4731570 Electrical drive circuit for a variable-speed switched reluctance motor |
| 03/09/1988 | EP0258569A2 Electromagnetic positioning device |
| 03/08/1988 | US4730149 Circuit arrangement for regulating the rpm of a series motor |
| 03/02/1988 | EP0257820A2 Feedback control system for producing PWM control signals |
| 02/18/1988 | DE3627713A1 Circuit arrangement of a converter which supplies a synchronous motor at low rotation speeds via two DC intermediate circuits |
| 02/16/1988 | EP0238509A4 Solenoid driver control unit. |
| 02/02/1988 | US4723103 Control equipment for an electro-magnetic linear motor |
| 01/28/1988 | WO1988000409A3 Power circuit for switching the number of poles on the rotor of synchronous machines by using rotative diodes |
| 01/26/1988 | US4721898 Wound rotor motor control |