Patents for H02P 5 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors (4,788)
05/1995
05/24/1995EP0241563B2 Speed control system
05/11/1995DE4338339A1 Control device for at least two electric motors, in particular of roller drives
05/09/1995US5413210 Controlling a feed of objects
05/04/1995WO1995012242A1 POWER SUPPLY SYSTEM FOR n ASYNCHRONOUS MOTORS
05/04/1995DE4411280A1 Circuit for an electric adjustment device and an electric load
04/1995
04/18/1995US5408164 Differential speed control of electric motors
04/06/1995WO1995009104A1 Ribbon sensing device for bag tyer
04/05/1995EP0646797A1 Circuit for judging motor rotation and apparatus for confirming motor stop using said circuit
03/1995
03/16/1995DE4330537A1 Frequenzumrichter und Verfahren zu seinem Betrieb Frequency and method for its operation
03/15/1995CN1027878C Road train driven by electric motor
03/09/1995WO1995006973A1 Power supply arrangement for a multiple electric motor line drive
02/1995
02/28/1995US5393201 Synchronous rotating apparatus for rotating a plurality of shafts
02/14/1995US5389749 Elevator system
01/1995
01/24/1995US5384520 Balanced drive motors with cross-coupled excitation
01/19/1995DE4420609A1 Controller for a machine drive
01/19/1995DE4322744A1 Electrical drive system for adjusting one or more rotatable and/or pivotable functional parts in devices and machines, drive arrangement with an angular position transmitter and printing machine
01/17/1995US5383066 Compensation for the dropout of a drum frequency generator signal in a drum servo system
12/1994
12/28/1994EP0631367A1 Integrated anti-backlash gearhead motor
12/27/1994US5377094 Push-pull output stage for driving motors which generates auxiliary voltage supply
12/22/1994WO1994029596A1 Positive displacement machine with electronic motor synchronisation
12/20/1994US5374878 Modular electrical system for drive units
12/13/1994US5373206 Position detection of rotors for switched reluctance motor
12/13/1994US5373194 Reactive power control system
12/07/1994CN1026937C System and method for controlling speed of electric motor in extremely low speed range using rotary pulse encoder
12/06/1994US5371445 Switching device for controlling two electric motors at different speeds
11/1994
11/17/1994EP0624946A2 Cellular motor control network
10/1994
10/25/1994US5359154 Conveyor apparatus having plural conveyors with equalized conveying speeds controlled by an inverter means
10/25/1994CA2041372C Apparatus for changing the frequency of motion of a pusher
10/20/1994DE4312041A1 Electrical drive for combing machines
10/13/1994WO1994023484A1 Synchronous motor system employing a non-synchronous motor for enhanced torque output
10/13/1994WO1994023303A1 Circuit for judging motor rotation and apparatus for confirming motor stop using said circuit
10/12/1994CN1093471A Ordinary differential equation computer and motor speed adjusting technique
10/05/1994CN1026138C Method for controlling of tension of warp and loom with unit for tension of warp
10/04/1994US5352965 Container crane driving control system
09/1994
09/29/1994WO1994022201A1 Electric power control system
09/15/1994WO1994021030A1 Process for preventing damage to numerically controlled machines in the event of a power failure
09/14/1994EP0615181A1 Method and device for automatically adjusting the speed ratios of a drafting machine
09/06/1994US5345155 Control system for electric vehicle
09/01/1994WO1994019865A1 Digital motor control system
09/01/1994CA2118221A1 Digital motor control system
08/1994
08/31/1994CN1025810C Multi-electrical multi-speed automatic follow synchronism loop device
08/10/1994EP0502875B1 Safety system for a stepper-motor drive
08/03/1994EP0608769A2 Control device for air conditioner
07/1994
07/27/1994EP0607218A1 Vehicle with driving wheels driven by electric motors
07/27/1994CN1090100A Method for driving of electric motor
07/19/1994US5331539 Mailing machine including multiple channel pulse width modulated signal circuit
07/12/1994US5329216 Multi-shaft driving apparatus and fluid rotary apparatus
07/07/1994WO1994014649A1 Propeller drive system
06/1994
06/21/1994US5323096 Servomotor control device using servomotor rotation speed extrapolation
06/14/1994US5321343 Digital motor control system
06/14/1994CA2054051C Integrated motor drive and recharge system
06/09/1994WO1994012715A1 Needling machine and needling method related thereto
06/08/1994EP0600679A2 Apparatus including a multiple channel pulse width modulated signal circuit
06/08/1994CN1087587A A motor system for an electric type vehicle
06/02/1994CA2110330A1 Mailing machine including multiple channel pulse width modulated signal circuit
06/01/1994EP0599608A2 Method and apparatus for driving motor
05/1994
05/25/1994CN2166559Y Computer field excitation regulator for powerless transducer
05/18/1994CN1086939A Method for rotor magnetic potential holographic control and motor
05/18/1994CN1086936A Damping flux linkage observation device for ac-ac frequency conversion synchronous motor damping flux linkage directive control
05/11/1994EP0596170A1 Simultaneously operative multi-unit AC or DC series excitation motors or compound motors interlock driving circuit device
05/11/1994DE4238760A1 Gear relaxation on stoppage - using counter control on reverse motion through belt drives to block relaxation or allow only controlled drift
05/04/1994EP0595645A1 Container crane driving control system
03/1994
03/23/1994EP0587835A1 Frequency converter with buffer-circuit monitor
03/09/1994CN1083637A Apparatus for restarting inverter for driving sync hronous motor after momentary interruption
03/01/1994US5291410 Circuitry for synchronizing the speed of a plurality of engines by sequentially averaging phase difference with a reference phase representing a desired speed
02/1994
02/23/1994CN1082781A Differential parallel operation circuit for commutator type motor
02/22/1994US5289100 System for powering, speed control, steering, and braking
02/16/1994EP0583054A1 Commutator type motor differential parallel operating circuit with unbalance current circulatory choke function
02/03/1994DE4325210A1 Re-starting device for sync drive motor inverter following short interruption - synchronises frequency and phase of motor terminal voltage and required inverter output voltage to provide re-starting command
02/03/1994DE4225534A1 Electric motor operating and monitoring circuit for underground mining equipment - uses amplitude shifting keying data to modulate energy supply line with motor control data
02/03/1994DE4224755A1 Separate spindle motor control - has a setting system for each motor with programs for start=up and brake operations
01/1994
01/27/1994DE4238968C1 Parallel control for lifting mechanism drives - has at least two lifting mechanism drives each with asynchronous motor with pole changeover winding of one of each motor as load winding
01/13/1994DE4322991A1 Motor control installation - capable of stopping all motors, (and the rolls driven by these motors) at the same time
01/12/1994EP0578567A1 Speed commutation device for two electric motors with different speeds
01/05/1994EP0576947A1 Motor system of an electric vehicle
01/05/1994DE4301367A1 Adjustable vibration drive with two unbalanced bodies e.g. for filter or conveyor - uses two AC drive motors coupled to two different AC systems, with different frequencies or phase, one of which is produced by semiconductor switch.
01/02/1994CA2098884A1 Motor system for an electric type vehicle
12/1993
12/29/1993EP0576108A2 Drive concept for electrically driven rotary actuator
12/22/1993EP0574693A2 Method and device for the signal analysis of a regulating stage
12/22/1993EP0574573A1 Centrifuge with dual motor synchronous drive system
12/15/1993CN1079441A Device for controlling of elevator
12/14/1993US5270578 Method and system for controlling electric loads with high reliability
11/1993
11/30/1993US5266787 Laser scanner using two scan motors independently controlled by a single signal
11/23/1993US5263413 Method and system for synchronously phase-controlling printing roll driving system for corrugated board printing press
11/11/1993DE4235223C1 Operating and braking circuit for several AC motors coupled via load - has single brake switch connecting braking resistance bridged by free-running diode across DC voltage rail pair supplying all motors
11/11/1993DE4215005A1 Spindle revolution electrical monitoring appts. for ring spinning frame - comprises spindles driven by separate electric motors attached to generator sending impulses on=line to analyser for indicating spindle stoppage faults
11/03/1993EP0567781A2 Method and device for controlling electric motors
10/1993
10/20/1993CN1022497C Terry method and loom having pile-forming elements
10/14/1993WO1993020613A1 Frequency converter with buffer-circuit monitor
10/13/1993CN2143848Y Rotary speed controller for rotor moving speed regulating motor
10/12/1993US5252900 Harmonization control system for plural shafts
10/07/1993DE4211183A1 Umrichter mit Zwischenkreismonitor Inverter with DC Monitor
10/05/1993US5249756 Apparatus for changing the frequency of motion of a pusher
09/1993
09/29/1993CN1022277C Variable speed controlled induction motor
09/22/1993EP0561188A1 Procedure for the precision crosswinding of ribbon-like or yarn-like material
09/21/1993US5247217 Safety system for a stepper-motor drive
09/14/1993US5245257 Control system
09/08/1993EP0558921A1 Synchronous rotating apparatus of plurality of shafts
09/02/1993WO1993012999A3 Control system for an accumulating conveyor
08/1993
08/24/1993US5239247 Reconfigurable master-slave control
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