| Patents for H02P 5 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors (4,788) |
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| 11/19/1991 | CA1292303C Vending machine control with improved product delivery motor homedetection, motor speed control and power supply |
| 11/14/1991 | DE4014608C1 Slow running direct drive for spinning machine - incorporates multiphase slip-ring rotor engine where stator coils have 1st frequency converter and rotor coils have 2nd frequency converter |
| 11/12/1991 | US5065078 D.C. motor control circuit for radio controlled toy |
| 10/31/1991 | WO1991016758A1 Plural motor fan system with improved speed control |
| 10/30/1991 | EP0454634A2 Apparatus for changing the frequency of motion of a pusher |
| 10/22/1991 | US5058628 Terry loom having programmable pile forming elements |
| 10/15/1991 | US5058016 Computerized electrical vehicle |
| 10/10/1991 | DE4011319A1 Asynchronous electric motor drive for mining machine - has single current regulator allowing individual or parallel operation of motors |
| 10/08/1991 | US5055756 Traverse apparatus and image recording apparatus |
| 10/02/1991 | DE4010376A1 Ring spinner spindle drive - has three phase synchronous motor with permanently energised rotor for control through switches |
| 09/25/1991 | EP0447583A1 Apparatus for feeding electrode wire |
| 09/24/1991 | US5051639 Y-delta conversion switches on dual stator induction motor |
| 09/18/1991 | EP0446641A2 Position controller for the driving shafts of a printing machine |
| 09/17/1991 | US5049798 Control apparatus |
| 09/10/1991 | US5047703 Motor driving device |
| 09/10/1991 | US5047702 Synchronous control method and apparatus therefor |
| 08/28/1991 | EP0443612A1 Controller of motors |
| 08/27/1991 | US5042965 Propeller synchrophaser control with trajectory logic |
| 08/27/1991 | CA1288131C Rotation controller for a differential actuator |
| 08/14/1991 | EP0440868A1 Control for a plural motor converter tilting drive |
| 08/08/1991 | WO1991011688A1 Electromagnetic balance type scale having rapid response characteristics |
| 08/07/1991 | EP0440025A2 Device for driving an open end spinning machine |
| 08/06/1991 | US5038086 Power seat, improved rotary switch system therefor |
| 07/24/1991 | EP0437669A1 Method and circuit for the direct control of the current output of an inverter, supplying a predetermined number of rotating field machines |
| 07/16/1991 | US5033000 Variable keyed power distribution and control system for motorized wheelchair |
| 07/16/1991 | US5032938 Method and apparatus for controlling reel-to-reel tape transportation |
| 07/10/1991 | EP0436209A2 Harmonization control system for plural shafts |
| 07/10/1991 | CN1013152B Core monitor that uses rotor shaft voltage |
| 06/27/1991 | WO1991009463A1 Inverter-controlled apparatus for carrying and measuring articles |
| 06/25/1991 | US5027277 Method for synchrophaser measurement and synchrophaser control |
| 06/13/1991 | WO1991008391A1 Safety system for a stepper-motor drive |
| 06/05/1991 | EP0429768A2 Method for error correction in synchronized superposed operation of servomotors |
| 06/04/1991 | CA1284682C Propeller synchrophaser |
| 05/29/1991 | EP0428783A1 Drive with a plurality of pinions having no play |
| 05/28/1991 | US5019755 Electric motor drive system |
| 05/21/1991 | CA1284306C Drive system for a multiplicity of cables for the installation of a synchronous transportation system, and automatic control method for synchrously driving said cables |
| 05/14/1991 | US5015938 Synchronizable drive system |
| 05/14/1991 | US5014756 Pile warp tension control in a loom |
| 05/01/1991 | CN1051108A 感应电动机 Induction motor |
| 04/11/1991 | DE3933524A1 Inverter-fed motor operation with isolated stator windings - allows direct inverter operation at low speeds with quadrature sinusoidal currents from independent-fired thyristor bridges |
| 04/10/1991 | EP0421656A1 Induction motor |
| 04/10/1991 | EP0421655A1 Induction motor |
| 04/10/1991 | CN1050650A 感应电动机 Induction motor |
| 04/02/1991 | US5004962 Automatic motor synchronizer |
| 04/02/1991 | US5004961 Window operator control |
| 03/12/1991 | US4999561 Variable-speed driving system |
| 03/07/1991 | DE3928451A1 Intelligent control and regulation system for complex drives - has electric motors, measurement devices, power electronics, drive units with logical interconnection via standard interfaces |
| 03/05/1991 | CA1281067C Static power conversion for adding d.c. motors |
| 02/27/1991 | EP0414046A2 Synchronisation control system for servo motors |
| 02/27/1991 | EP0413893A2 Process and circuit for monitoring of regulating elements with electric motors |
| 02/21/1991 | DE3926413A1 Drive for non-uniform operations has multiple programmed motors - which produce intermittent action on tools to function with material moving at steady speed |
| 02/05/1991 | CA1279929C Adaptive rewind for tape drive |
| 01/29/1991 | US4988930 Plural motor fan system with improved speed control |
| 01/22/1991 | US4987351 Load-based control of an AC motor |
| 01/17/1991 | DE3922410A1 High-availability drive with redundant rigidly-coupled motors - enables role of failing motor or regulator to be fulfilled by survivor operated under different conditions |
| 01/16/1991 | CN1011215B Improved propeller synchrophaser |
| 01/10/1991 | DE3920323A1 Valve to control two hydraulic motors - proportional magnets actuate valve pistons |
| 12/25/1990 | US4980621 Control arrangement for controlling the power supplied to an electric motor |
| 12/18/1990 | USRE33500 Electronic digitized proportional-integral controller |
| 12/13/1990 | WO1990015474A1 Motor controller |
| 12/12/1990 | EP0401375A1 Method of controlling synchronized operation of a machine tool |
| 12/05/1990 | EP0401057A2 Variable-speed driving system |
| 11/28/1990 | EP0399475A2 PLL speed control circuit |
| 11/28/1990 | CN1010642B Control arrangement for turning induction motor |
| 11/22/1990 | EP0397818A1 A process and device for changing the actual rotation speed of a multi-phase non-synchronous motor and a suitable motor system for applying the process. |
| 11/14/1990 | EP0397592A2 Improved method of phase control and measurement for propeller synchronizers |
| 10/31/1990 | CN1010206B Propller synchrophaser and mode logic |
| 10/25/1990 | DE3913103A1 Drive apparatus for paper roll feed of printer or plotter - employs pulse modulator and electronic torque control of DC motors for take=up drive and input spool drawing |
| 10/17/1990 | EP0392780A1 Multi-stage electric drive |
| 10/17/1990 | EP0392194A1 Ring spinning machine |
| 10/11/1990 | CA2014326A1 Multi-stage electric drive |
| 10/11/1990 | CA2013946A1 Method for synchrophaser measurement and synchrophaser control |
| 08/14/1990 | US4947634 Ring spinning or ring twisting machine |
| 08/09/1990 | WO1990009050A1 Power supply system |
| 07/04/1990 | EP0375786A1 Motor controller |
| 06/28/1990 | DE3941947A1 Shaft conveying machine cable winch drive - uses two three=phase asynchronous machines with slip-ring rotors coupled via electric line |
| 06/13/1990 | EP0372095A1 Electromotive drive |
| 06/12/1990 | US4933613 Control for operating a plurality of window operators |
| 05/31/1990 | DE3900589A1 Arrangement for synchronization of the rotation speeds of at least two electronically commutated DC motors |
| 05/23/1990 | DE3936936A1 Drive system e.g. for mining chain-conveyor - has at least one main drive and specified number of auxiliary drives using AC electric motors with mutually dependent regulation |
| 05/17/1990 | WO1990005407A1 A process and device for changing the actual rotation speed of a multi-phase non-synchronous motor and a suitable motor system for applying the process |
| 05/09/1990 | CN1007950B Torque determination for control of an induction motor apparatus |
| 04/24/1990 | US4919049 Web feed printing press |
| 04/10/1990 | US4916367 Method of and apparatus for preventing scanning line deviation in a process scanner of a separated drum type |
| 03/28/1990 | CN1040830A Synchronizable drive systems |
| 03/27/1990 | US4912377 Device for driving several cables of a transportation installation operating in synchronism and method for the automatic regulation of the synchronous drive of these cables |
| 03/20/1990 | US4909286 Method for regulating the supply of weft thread on weaving machines, and a device which uses this method |
| 03/14/1990 | CN1040407A Method of controlling warp tension and loom having warp-tensioning elements |
| 03/07/1990 | CN2054233U Magnetic sensitive phase control regulator |
| 03/06/1990 | US4907105 Synchronized spindle control for disk drives |
| 02/22/1990 | WO1990001829A1 Method of controlling synchronized operation of a machine tool |
| 02/22/1990 | DE3828153A1 Process and apparatus for the doffing of a textile machine |
| 02/20/1990 | US4903191 Centrifuge control system having dual processors |
| 02/15/1990 | DE3827509A1 Drive, especially for the welding-wire feed on welding devices |
| 02/14/1990 | CN1006836B Multiphase brushless motor driven apparatus |
| 02/07/1990 | CN1039454A Terry method and loom having pile-forming elements |
| 02/06/1990 | CA1265578A1 Control system for a power converter for driving induction motors |
| 01/31/1990 | CN1039337A Arrangement for remote-transmitting rotary angle and acting force between given and executive shafts |
| 01/30/1990 | US4897635 Rotary device synchronizer |
| 01/17/1990 | EP0125317B1 Method of controlling changeover of plurality of motors |