| 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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| 03/29/2000 | CN1050894C Device for electrically controlling wind supply in apparatus for hot gas heating |
| 03/28/2000 | US6043618 Motor driving apparatus having back-gate-floating MOSFET for avoiding reverse current |
| 03/23/2000 | WO2000016482A1 Frequency control of linear motors |
| 03/23/2000 | CA2344356A1 Frequency control of linear motors |
| 03/21/2000 | US6040679 Variable capacity compressor having two-step motor strength adjustability |
| 03/21/2000 | US6040678 Switched reluctance motor having noise and vibration reduced |
| 03/21/2000 | US6040674 Motor driving device, method of adjusting the same, and information storage device |
| 03/21/2000 | CA2148633C Motor drive with programmable function switches |
| 03/16/2000 | WO2000014864A1 Method for controlling a current-regulated motor |
| 03/15/2000 | CN1050472C Device for converting resistance value into control signal which depends on resistance value, and electrical appts. comprising such device |
| 03/15/2000 | CN1050470C Control method of load-commutated synchronous motor drive |
| 03/15/2000 | CN1050468C Switching magnetic reluctance drive means, its control method and electric machine controller |
| 03/15/2000 | CN1050466C Electric motor for portable machine tools |
| 03/14/2000 | US6037740 Switched reluctance electric machine system |
| 03/14/2000 | US6037739 Electromagnetic drive system with integrated path signal generation |
| 03/14/2000 | US6037725 Two step power output motor |
| 03/08/2000 | CN1246753A Switching magneti-resistance driver with high power factor |
| 03/07/2000 | US6034496 Motor speed control using fixed-duration torque bursts |
| 03/01/2000 | EP0982845A2 Switched reluctance drive with high power factor |
| 03/01/2000 | EP0896716A4 Pwm/linear driver for disk drive voice coil actuator |
| 02/29/2000 | US6031350 Position control and monitoring circuit and method for an electric motor |
| 02/24/2000 | WO2000010245A1 Two step power output motor and associated hvac systems and methods |
| 02/24/2000 | WO2000009867A1 Device for controlling a regulator |
| 02/24/2000 | DE19834108A1 Method to determine rpm of direct current electric motor; involves low pass filtering of motor current signal and computing difference values between successive minimum and maximum of filtered signals |
| 02/17/2000 | WO2000008746A1 Method for the starting and steady-state supply of a permanent-magnet synchronous motor particularly for driving a hydraulic pump |
| 02/17/2000 | CA2305457A1 Method for the starting and steady-state supply of a permanent-magnet synchronous motor particularly for driving a hydraulic pump |
| 02/15/2000 | USRE36568 Current decay control in switched reluctance motor |
| 02/15/2000 | US6025691 Synchronous motor control system and method of controlling synchronous motor |
| 02/10/2000 | WO2000006308A1 Apparatus and system for controlling the operating frequency of an electromagnetic vibratory feeder at a submultiple of the power line frequency |
| 02/10/2000 | CA2338683A1 Apparatus and system for controlling the operating frequency of an electromagnetic vibratory feeder at a submultiple of the power line frequency |
| 02/03/2000 | WO2000005095A1 Method for controlling a reluctance motor |
| 02/02/2000 | EP0977344A2 Drive control method for linear oscillating motors and a linear oscillating motor |
| 02/01/2000 | US6020711 Multiple winding channel, magnetic coupling-alterable reluctance electrical machines and their fault tolerant control |
| 01/26/2000 | EP0974189A1 Fan cooler |
| 01/26/2000 | CN1048831C Driving circuit for switched reluctance motor |
| 01/18/2000 | US6016041 Rotary speed control circuit for feeding a dc universal motor |
| 01/11/2000 | US6014003 Method and apparatus for controlling a switched reluctance machine |
| 01/11/2000 | US6014002 Method for powering an electronically switched variable-reluctance electric motor, and power supply circuit therefor |
| 01/11/2000 | US6014001 Method for powering an electronically switched variable reluctance motor, and power supply circuit therefor |
| 01/11/2000 | US6013991 Motor control circuit |
| 01/06/2000 | WO2000000966A2 Improved notch filtering as used in a disc drive servo |
| 01/05/2000 | EP0969589A2 Cleaning apparatus and method with soft-starting |
| 01/05/2000 | DE19928758A1 Abnormality detector for energizing controller of phase coil used in electric motor |
| 01/04/2000 | US6011368 Sensorless detection of a locked rotor in a switched reluctance motor |
| 01/04/2000 | US6011367 Controller for devices driven by linear motors |
| 01/04/2000 | US6010333 Refillable burner assembly |
| 01/04/2000 | US6010310 Fan controller for reducing harmonic fluxuations that produces audible sounds |
| 12/28/1999 | US6008619 Motor drive apparatus and motor driving method capable of simply reducing rotating speed in PWM mode |
| 12/28/1999 | US6008616 Pole change induction motor and control apparatus and method for the same |
| 12/28/1999 | US6008615 Commutation controller |
| 12/28/1999 | US6008614 Synchronous motor with permanent magnets and motor system |
| 12/28/1999 | US6008603 Brushless DC motor assembly control circuit |
| 12/28/1999 | US6008601 Energization controller for an electric motor |
| 12/22/1999 | EP0965725A1 End of travel detecting device for a bidirectionally mobile element, especially roller shutter drum, and driving device of bidirectionally mobile element equipped with such end of travel device |
| 12/22/1999 | EP0965724A1 Driving device for a bi-directionally rotatable tubular roll, drum of roller shutter equipped with such driving device, roller shutter equipped with such winding drum |
| 12/21/1999 | US6005365 Motor control apparatus |
| 12/21/1999 | US6005321 Variable reluctance motor systems |
| 12/21/1999 | US6005310 Brushless linear motor slider |
| 12/16/1999 | WO1999065140A1 Appliance having an a.c. series motor and having switching means for switching this motor to different speeds |
| 12/16/1999 | DE19926963A1 Circuit for controlling current in phase coil of motor |
| 12/16/1999 | DE19926960A1 Circuit to reduce acoustic noise in motor |
| 12/14/1999 | US6002233 Low torque ripple switched reluctance motor regulation system |
| 12/14/1999 | US6002222 Device and method for controlling a time variable inductive load |
| 12/14/1999 | CA2143768C Sensorless measurement of electromagnetic actuator displacement device |
| 12/09/1999 | DE19924025A1 Excitation control device for each of several phase winding coils of stator of electric motor |
| 12/09/1999 | DE19825126A1 Arrangement for automatic compensation of rotor of electric motor, especially of fan wheel for fan fixed to rotor |
| 12/08/1999 | EP0962043A1 Apparatus for producing linear motion |
| 12/07/1999 | US5999431 Power controller for a switched reluctance motor with a high frequency noise filter |
| 12/07/1999 | US5998952 Method and apparatus for reducing torque ripple in an electric motor using anticasual filtering |
| 12/07/1999 | US5998945 Hysteresis current controller for a reluctance machine |
| 12/07/1999 | US5996196 Speed adjusting apparatus for plastic drawing installations |
| 12/01/1999 | EP0961392A2 Method and apparatus for vibration reduction/control in a variable reluctance linear motor |
| 12/01/1999 | CN1237284A Optical position-measurement device |
| 11/25/1999 | WO1999060695A1 Driving circuit for switched reluctance machines |
| 11/25/1999 | DE19823376A1 Drive unit for adjustment arrangement in motor vehicle |
| 11/25/1999 | CA2330672A1 Driving circuit for switched reluctance machines |
| 11/24/1999 | EP0959555A2 Operation of switched reluctance machines |
| 11/24/1999 | EP0959479A2 A method for controlling velocity of an armature of an electromagnetic actuator |
| 11/23/1999 | US5991143 Method for controlling velocity of an armature of an electromagnetic actuator |
| 11/23/1999 | US5990653 Method for controlling the speed of a single-phase asynchronous induction motor |
| 11/23/1999 | US5990639 Phase controller for intermittently supplying an AC motor with electric power |
| 11/16/1999 | US5986440 Load power control method using a phase control system, and device therefor |
| 11/16/1999 | US5986426 Adaptive pulse width modulated motor control |
| 11/16/1999 | US5986418 Noise reduction in a switched reluctance motor by current profile manipulation |
| 11/16/1999 | US5986417 Sensorless universal motor speed controller |
| 11/09/1999 | US5982135 Apparatus for sensing position of a switched reluctance motor having position compensation function for a rotor |
| 11/09/1999 | US5982130 Calibration technique to remove series resistance errors in the sensed back EMF of a motor |
| 11/09/1999 | US5982117 Method and apparatus for control of a switched reluctance motor |
| 11/09/1999 | US5980193 Magnetically levitated robot and method of increasing levitation force |
| 11/02/1999 | US5978172 Voice coil driven positioner for coarse and fine positioning of magnetic head in multi-track tape drive |
| 11/02/1999 | US5977740 Brake-by-wire system with switched reluctance motor controller |
| 10/27/1999 | EP0952663A2 Driving circuit for oscillatory actuator |
| 10/27/1999 | CN1046067C Motor drive unit and method for controlling the motor drive unit |
| 10/27/1999 | CN1045915C Reciprocatory dry shaver |
| 10/26/1999 | US5973473 Motor control circuit |
| 10/26/1999 | US5973472 Single-phase asynchronous motor with two windings |
| 10/26/1999 | US5973462 Method and apparatus of reducing acoustic noise in switched reluctance electric motor |
| 10/26/1999 | US5973461 Method and device for starting and synchronizing a three-phase motor |
| 10/26/1999 | US5973459 Linear motor apparatus, and stage apparatus, exposure system and device production method using the linear motor apparatus |
| 10/26/1999 | US5973431 Reluctance machine with permanent magnet rotor excitations |