| Patents for H02P 23 - Arrangements or methods for the control of ac-motors characterised by a control method other than vector control (5,487) |
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| 11/11/2008 | US7449860 Control technique for limiting the current of an induction machine drive system |
| 11/11/2008 | US7449859 Reduction of subharmonic oscillation at high frequency operation of a power inverter |
| 11/11/2008 | US7448383 Air assistance apparatus providing fast rise and fall of pressure within one patient's breath |
| 11/05/2008 | CN201146481Y Medium-voltage motor slip-control digital intelligence speed-regulating device without speed sensor |
| 11/05/2008 | CN101299605A Automatic switch source system of novel yield meter |
| 10/30/2008 | US20080265833 Driving level control structure eliminating electric noise from motor |
| 10/29/2008 | EP1986317A1 Stator resistance adaptation in sensorless PMSM drives |
| 10/29/2008 | EP1985008A1 Motor drive device and control method thereof |
| 10/29/2008 | CN201142668Y Electricity-saving control device of frequency convertor |
| 10/29/2008 | CN101295956A Controller for base plate electric machine of microwave oven |
| 10/28/2008 | US7443131 Control device for electric power steering apparatus |
| 10/28/2008 | US7443128 Method and device for controlling motors |
| 10/28/2008 | US7443126 Controller for synchronous machine |
| 10/23/2008 | US20080260541 Induction Motor Control |
| 10/23/2008 | US20080258665 Door drive control apparatus and door drive control method |
| 10/22/2008 | CN101291132A Method and system for pulse position scheduling for electric drive |
| 10/21/2008 | US7439703 Controller for synchronous machine |
| 10/21/2008 | US7439702 Application of a switched reluctance motion control system in a chiller system |
| 10/21/2008 | US7437882 Apparatus for driving a compressor and a refrigerating air conditioner |
| 10/16/2008 | US20080252242 Apparatus and method for driving rotary machine |
| 10/15/2008 | CN101288221A Processing unit |
| 10/15/2008 | CN100426648C Method for driving induction motor |
| 10/14/2008 | US7437201 Electric motor controller |
| 10/09/2008 | WO2008005363A3 Parking control technique for permanent magnet motor drives with sinusoidal bemf |
| 10/08/2008 | CN201130919Y Drive device for motor of novel electric vehicle |
| 10/08/2008 | CN100424991C Drive circuit for rotating resonance type motor |
| 10/08/2008 | CN100424990C Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith |
| 10/08/2008 | CN100424980C Apparatus for compensating for speed error of motor |
| 10/02/2008 | WO2008116885A1 Electrical drive machine |
| 10/02/2008 | WO2008008486A3 Signal conditioning apparatus and method for determination of permanent magnet motor rotor position |
| 10/01/2008 | CN100422758C Device for determining constant of rotating machine |
| 10/01/2008 | CN100422066C Elevator controller |
| 09/30/2008 | US7429847 Motor control device |
| 09/25/2008 | WO2008115438A1 Indirect rotor resistance estimation system and method |
| 09/25/2008 | US20080231224 Timer circuit and time count method |
| 09/25/2008 | US20080231219 Motor drive apparatus and motor drive method |
| 09/25/2008 | DE102007012669A1 Electric motor for driving accessory e.g. coolant pump, of motor vehicle, has voltage compensator to enhance controller-adjusting signal during deviation of control variable from desired value, independent of voltage factor |
| 09/25/2008 | CA2681037A1 Indirect rotor resistance estimation system and method |
| 09/24/2008 | CN201122928Y Star-delta automatic switching energy-saving distributor of oil well motor |
| 09/24/2008 | CN101272124A Timing method and device for AC asynchronous motor |
| 09/18/2008 | WO2008110817A2 Determining average current drawn by a motor |
| 09/18/2008 | US20080224644 Method capable of controlling initial current for driving a motor |
| 09/17/2008 | EP1971020A2 Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor |
| 09/17/2008 | CN201118512Y Speed-adjusting motor torque compensation circuit |
| 09/17/2008 | CN201118511Y Intelligent energy-saving controller for immersed oil power pump |
| 09/17/2008 | CN201118510Y Light-duty voltage adjusting power device |
| 09/17/2008 | CN201118509Y Energy-saving consumption reduction dual-speed belt transport machine |
| 09/17/2008 | CN100420147C Permasyn electric machine control system based on adaptive sliding moding structure |
| 09/12/2008 | WO2008108159A1 Controller for motor, and vehicle |
| 09/11/2008 | US20080218111 Control Device for Motor Drive System and Electric Vehicle Including the Same |
| 09/11/2008 | US20080218105 Method for Operating a Fuel Pump |
| 09/11/2008 | DE102007011018A1 Verfahren zum Betreiben einer Kraftstoffpumpe A method of operating a fuel pump |
| 09/11/2008 | DE102007010505A1 Reifensensormodul Tire sensor module |
| 09/10/2008 | EP1968184A2 Motor controller and motor control system |
| 09/10/2008 | EP1968180A2 Multi level inverter using cascade configuration and control method thereof |
| 09/10/2008 | EP1965725A1 Adaptive drive system using current values for a personal care appliance |
| 09/10/2008 | CN201113898Y Electric motor intelligent electricity saver |
| 09/10/2008 | CN201113896Y Oil pumping machine dedicated machine controller |
| 09/10/2008 | CN201113895Y Oil pumping machine double-power automatic switchover energy-saving electrical distribution box |
| 09/10/2008 | CN201113894Y Oil pump energy-saving device |
| 09/10/2008 | CN201113893Y Fan system and fan |
| 09/10/2008 | CN201113892Y Spindle breaker power controller |
| 09/03/2008 | EP1965490A2 Apparatus and method for driving synchronous motor |
| 09/03/2008 | EP1683262B1 Braking method for a synchronous machine |
| 09/03/2008 | CN101257278A Automatic gear shifting system of paper chipper |
| 09/03/2008 | CN100417011C High-voltage variable frequency speed regulating method and apparatus thereof based on alph-beta current component direct-filling |
| 09/03/2008 | CN100417009C Automatic control speed regulation motor |
| 08/28/2008 | US20080203963 Motor controller and electric power steering apparatus |
| 08/27/2008 | CN101253676A Variable-frequency drive with regeneration capability |
| 08/27/2008 | CN101252337A Reduction of subharmonic oscillation at high frequency operation of a power inverter |
| 08/21/2008 | DE202008006868U1 Chirurgische Antriebseinheit, chirurgisches Instrument und chirurgisches Antriebssystem Surgical drive unit, surgical instrument and surgical drive system |
| 08/21/2008 | DE102007017296A1 Method for operating electrical machine, involves determining equal input current of control device, which is assigned to electrical machine by observer depending on effective power balancing of electrical machine |
| 08/20/2008 | EP1959559A2 Phase detection method, phase detecting apparatus, synchronous-motor control method, and synchronous motor controller |
| 08/20/2008 | EP1959554A1 Converter circuit for a doubly-fed asynchronous generator with variable output power and method for its operation |
| 08/19/2008 | US7414425 Damping control in a three-phase motor with a single current sensor |
| 08/14/2008 | WO2008097743A1 Ventilation airflow rate control |
| 08/14/2008 | WO2008096034A1 Method for controlling an electric drive |
| 08/14/2008 | US20080191656 Synchronous Machine Control Apparatus |
| 08/14/2008 | US20080191655 Motor controller and electric power steering system |
| 08/14/2008 | DE102007006154A1 Motor control device for controlling motor by alternating current-cycloconverter, has current measuring device for measuring motor currents |
| 08/14/2008 | CA2676104A1 Ventilation airflow rate control |
| 08/13/2008 | CN101240699A Oilfield oil pumping machine energy-saving method and startup wheel |
| 08/13/2008 | CN100411299C Energy-saving control method and apparatus for asynchronous motor of walking-beam pumping unit |
| 08/13/2008 | CN100411297C Motor drive inverter control apparatus |
| 08/13/2008 | CN100411284C Space vector PWM modulator for permanent magnet motor drive |
| 08/06/2008 | CN101238536A Safety switching unit for controlling a safety device into a safe state |
| 08/06/2008 | CN100409563C Motor intelligent power-saving protector |
| 08/05/2008 | US7408322 Device for determining constant of rotating machine |
| 07/31/2008 | US20080180055 Systems and methods for improved motor drive power factor control |
| 07/31/2008 | DE102008006926A1 Motor controlling method for e.g. step-stitch sewing machine, involves performing resonance relationship control for resonance mode of order, and performing phase alternation compensation for vibration-mode of higher order |
| 07/30/2008 | EP1949529A1 Electric motor with programmed asic |
| 07/30/2008 | CN101232271A Motor controlling method and device for step-stitch sewing machine |
| 07/30/2008 | CN100407558C 电动马达启动系统的构建装置 Construction means the electric motor to start the system |
| 07/29/2008 | CA2327579C Method and apparatus of improving the efficiency of an induction motor |
| 07/24/2008 | US20080174257 Variable speed drive with integral bypass contactor |
| 07/24/2008 | US20080174255 Common mode & differential mode filter for variable speed drive |
| 07/24/2008 | DE102006021498B4 Elektrische Wechselstrommaschine Electric alternator |
| 07/23/2008 | CN101227168A Apparatus and method for detecting input current of inverter |
| 07/23/2008 | CN101227166A Induction motor controller |
| 07/16/2008 | CN101222205A Motor control method and apparatus |