| 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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| 01/26/1988 | US4721188 Control apparatus for A.C. elevator |
| 01/20/1988 | EP0253267A2 AC motor drive apparatus |
| 01/19/1988 | US4720661 Method and apparatus for controlling reel tension |
| 01/19/1988 | CA1231755A1 Interlaced pulse-width modulated unrestricted frequency changer system |
| 01/13/1988 | EP0252898A2 Three-phase induction motor drive with frequency converter control |
| 01/12/1988 | US4719400 Motor control apparatus |
| 01/12/1988 | CA1231378A1 Method and apparatus for stabilizing the locus of a vector formed by intergration |
| 12/30/1987 | WO1987007989A1 Three-phase ac motor controller |
| 12/30/1987 | WO1987007988A1 Switched capacitor induction motor drive |
| 12/23/1987 | EP0250008A1 Method and apparatus for halving the rotational speed of an electromotor |
| 12/22/1987 | US4714039 Sewing machine driving system |
| 12/15/1987 | US4713744 Fractional frequency converter using zero switching of input frequency halfwaves |
| 12/15/1987 | US4713595 Control apparatus for elevator |
| 12/08/1987 | US4712054 Controller with two modes of braking induction motors |
| 12/03/1987 | WO1987007455A1 Frequency converter for the stabilized supply of asynchronous motors |
| 12/02/1987 | EP0247650A2 Motor speed control system |
| 11/25/1987 | EP0246326A1 Method and apparatus for controlling torque of a servo motor |
| 11/24/1987 | US4709317 Inverting apparatus |
| 11/19/1987 | EP0245395A1 Control circuit. |
| 11/19/1987 | DE3616221A1 Electrical machine |
| 11/17/1987 | US4707651 Voltage-controlled field-oriented induction motor control system |
| 11/10/1987 | US4706012 Frequency compensated regulator |
| 11/04/1987 | CN87100103A Control method for electric power converting apparatus and their arrangement |
| 10/27/1987 | US4703246 Control method and apparatus for synchronous motor |
| 10/27/1987 | US4703245 Method and apparatus for controlling permanent magnet synchronous motor by using pulse width modulation |
| 10/22/1987 | WO1987006403A1 Method and device for driving an asynchronous motor with speed control by means of a controlled inverter |
| 10/21/1987 | EP0241920A2 Control system for PWM inverter |
| 10/21/1987 | EP0241867A1 Acceleration/deceleration control apparatus using slip speed |
| 10/21/1987 | CN87103189A Control arrangement for turning induction motor |
| 10/14/1987 | EP0241045A1 Motion control apparatus for induction motor |
| 10/01/1987 | DE3625502C1 Circuit arrangement for supplying an AC motor or three-phase motor via a pulse-controlled invertor (pulse-width-modulated invertor) |
| 09/30/1987 | CN87100351A Method of controlling transducer arrangement |
| 09/29/1987 | US4697131 Voltage source inverter and variable frequency, constant voltage AC motor drive embodying the same |
| 09/24/1987 | WO1987005755A1 Device for detecting the rotational position of rotor of motor |
| 09/23/1987 | EP0237717A2 Speed control of an electrical motor |
| 09/16/1987 | CN87101734A Control apparatus of elevator |
| 09/02/1987 | EP0234293A2 Reactive power processing circuit for a current source GTO invertor |
| 09/02/1987 | EP0233948A1 Method of controlling a three-phase induction motor |
| 08/25/1987 | US4689543 Frequency and voltage control for inverter powered AC motor |
| 08/25/1987 | US4689542 Method and apparatus for controlling induction motor |
| 08/19/1987 | EP0232702A2 Method and apparatus for controlling power converter |
| 08/19/1987 | EP0232547A2 Undersynchronous and oversynchronous current rectifier cascade and method for operating it |
| 08/18/1987 | US4687978 Positioning indexing control device for inverter apparatus |
| 08/12/1987 | EP0231315A1 Induction motor drive arrangement |
| 08/12/1987 | EP0128182B1 Method and apparatus for automatically setting the demand phase lag input to an induction-motor power factor controller |
| 08/04/1987 | US4684868 Induction motor control apparatus and method for restart when rotating in shutdown |
| 07/29/1987 | CN87100280A Control apparatus for pwm converter |
| 07/29/1987 | CN86108659A 逆变器 Inverter |
| 07/28/1987 | US4683412 Current source inverter motor drive adapted for full current regenerative mode operation |
| 07/23/1987 | DE3701208A1 Control method for an invertor |
| 07/22/1987 | EP0229656A2 A control method for pulse width modulation inverters |
| 07/21/1987 | US4682095 Circuit arrangement for controlling starting current of a motor |
| 07/21/1987 | US4682094 Control system for a power converter driving a synchronous motor |
| 07/15/1987 | EP0228535A1 Method and device to determine the flux angle of an induction machine i.e. to operate the machine according to position |
| 07/14/1987 | US4680695 Cross coupled current regulator |
| 07/14/1987 | US4680525 Induction motor driving system |
| 07/14/1987 | CA1224245A1 Power converter for ac load |
| 07/08/1987 | EP0227721A1 Method and device for reducing iron and copper losses in an induction motor |
| 07/07/1987 | US4678980 Power failure stop circuit for a converter |
| 07/07/1987 | US4678248 Direct self-control of the flux and rotary moment of a rotary-field machine |
| 07/01/1987 | CN86108448A Permanent magnet exciting synchronous electric motor |
| 06/30/1987 | US4677540 AC motor control panel |
| 06/30/1987 | US4677361 Apparatus for operating an elevator |
| 06/30/1987 | US4677354 Device for regulating the speed of an asynchronous electric motor |
| 06/19/1987 | DE3543809A1 Permanentmagneterregte synchronmaschine Permanent-magnet synchronous machine |
| 06/18/1987 | WO1987003648A1 Synchronous machine with permanent magnet excitation |
| 06/17/1987 | CN86107129A Induction motor control apparatus and method for restart when rotating in shutdown |
| 06/16/1987 | US4673860 Speed control circuit for AC motor |
| 06/16/1987 | US4673859 Induction motor synthesis control apparatus and method |
| 06/16/1987 | US4673858 Power converter for AC load |
| 06/10/1987 | CN86107483A Driving arrangement for ac motor |
| 06/09/1987 | US4672288 Torque controller for an AC motor drive and AC motor drive embodying the same |
| 06/09/1987 | US4672286 Induction motor drive circuits |
| 06/09/1987 | US4671389 Speed control apparatus for an elevator |
| 05/27/1987 | EP0121575B1 Controller for motor |
| 05/21/1987 | WO1987003151A1 Control circuit |
| 05/19/1987 | US4666020 Control apparatus for elevator |
| 05/19/1987 | CA1222021A1 Method and apparatus for controlling pwm inverters |
| 05/13/1987 | EP0221528A2 Improvements in or relating to a tightening system and/or a method of tightening |
| 05/13/1987 | EP0221247A1 Asynchronous machine drive |
| 05/13/1987 | EP0221240A2 Tension control |
| 05/12/1987 | US4663942 Air conditioner |
| 05/07/1987 | WO1987002841A1 Method and apparatus for controlling torque of a servo motor |
| 05/05/1987 | US4662478 Apparatus for automatic floor arrival at service interruption in A. C. elevator |
| 05/05/1987 | US4662185 System of controlling refrigerator temperature |
| 04/29/1987 | CN86107452A Power failure stop circuit for a converter |
| 04/28/1987 | US4661757 Controller for AC elevator |
| 04/22/1987 | EP0218983A1 AC motor control method and its control apparatus |
| 04/22/1987 | EP0218729A1 Method of controlling a three-phase induction motor |
| 04/21/1987 | CA1220840A1 Electronic control for a domestic appliance |
| 04/14/1987 | CA1220511A1 Arrangement for controllably driving an a.c. motor |
| 04/08/1987 | EP0217411A2 Apparatus for controlling electric vehicle using induction motor |
| 04/07/1987 | US4656571 Frequency converting device and control method therefor |
| 04/07/1987 | US4656401 Load drive apparatus |
| 04/01/1987 | EP0216373A2 Induction generator/motor system |
| 03/24/1987 | US4652989 Frequency converter apparatus |
| 03/19/1987 | DE3533277A1 Arrangement for regulating a motor |
| 03/18/1987 | EP0214306A1 Multi-phase squirrel-cage induction motor |
| 03/18/1987 | EP0214301A1 System for controlling torque of induction motor |
| 03/18/1987 | EP0126779B1 Ac motor control system |