Patents
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)
08/2008
08/06/2008CN101237209A Highly responsive permanent magent motor controller
08/05/2008US7408312 Control device for permanent magnet synchronous motor
07/2008
07/30/2008EP1950877A1 Method for supplying a single-phase electric motor and supply system for implementing such a method
07/29/2008CA2327579C Method and apparatus of improving the efficiency of an induction motor
07/24/2008US20080174257 Variable speed drive with integral bypass contactor
07/24/2008DE102006021498B4 Elektrische Wechselstrommaschine Electric alternator
07/23/2008EP1946437A1 Apparatus and method for driving 2-phase srm motor
07/23/2008CN201090479Y Fan operating control circuit
07/23/2008CN101228680A Apparatus and method for increasing efficiency of electric motors
07/23/2008CN101227167A Motor drive apparatus
07/23/2008CN100405740C Digital differential amplification control device
07/23/2008CN100405734C Multiphase motor winding topology and control
07/17/2008WO2008084775A1 Inverter compressor operation method and compressor drive device
07/17/2008US20080169775 Control Apparatus for Electric Car
07/17/2008US20080168611 Changing Amplitude of Movement By Changing the Drive Frequency of a Toothbrush Brushhead
07/16/2008EP1943726A1 Electronic intermediate dc circuit
07/16/2008CN101222202A Multi-component timing method of power system especially for oil pump
07/16/2008CN101222201A Frequency-conversion pole-changing binary timing control cabinet especially for oil pump motor
07/10/2008US20080167769 Method For Controlling the Operation and Continuous Current Mode of a Drive Assembly For a Motor Vehicle Provided With an Internal Combustion Engine
07/09/2008EP1942573A1 Alignment apparatus and exposure apparatus using the same
07/09/2008EP1941593A1 Mixed device for controlling power transfer between two cores of a direct current network and supplying an alternating current motor
07/09/2008CN101218741A Variable speed drive for a chiller system with a switched reluctance motor
07/09/2008CN101218740A Electromotor
07/09/2008CN100401631C System and method for automatic current limit control
07/03/2008US20080157706 Method for Controlling a Heat Engine Vehicle Driving Assembly
07/02/2008CN101212197A AC motor system with variable number of pole pairs for electric automobile
07/02/2008CN100399695C Rotor position detecting for conversion-type magnetic resistance drive
07/02/2008CN100399682C Electrical machines
06/2008
06/26/2008DE112006002150T5 Drehmomentwelligkeitsunterdrücker eines Motors Drehmomentwelligkeitsunterdrücker a motor
06/25/2008EP1936798A2 Operation of an electrical drive system
06/25/2008CN201078841Y Multi-mode alternating current asynchronous motor operating control device
06/25/2008CN101208858A Method for controlling a reluctance motor
06/25/2008CN100397780C Motor control system and method with adaptive current profile
06/25/2008CN100397778C Brushless motor control utilizing independent phase parameters
06/19/2008WO2008072525A1 Shaft-type linear motor positioning device
06/19/2008DE10311028B4 Verfahren zur Bestimmung einer Startrotorlage und Drehzahl bei Impulsfreigabe einer stromrichtergespeisten, permanenterregten Synchronmaschine ohne Lage-und Drehzahlgeber Method for determining a starting rotor position and speed at pulse enable a converter-fed permanent magnet synchronous machine without position and speed encoder
06/18/2008EP1932233A1 Apparatus and method for driving 2-phase srm
06/18/2008CN201074605Y Primary and secondary shelves secondary velocity modulation electric fan
06/18/2008CN101204001A An electromechanical generator for, and method of, converting mechanical vibrational energy into electrical energy
06/18/2008CN101202527A High precision velocity simulate given circuit
06/17/2008US7388345 Rotor position detection in an electrical machine
06/11/2008EP1931025A2 Control of a switched reluctance machine
06/11/2008CN201072607Y Digitized electric power and electric motor control experimental device
06/11/2008CN100394028C Apparatus and method for controlling operation of a reciprocating compressor
06/05/2008WO2008066035A1 Seismic isolation control system
06/05/2008WO2008019754A3 Method for determining the dirtiness of an electrically driven cutting tool, and hair cutting device
06/05/2008US20080129237 Motor control method and motor control apparatus
06/05/2008DE102007057499A1 Control method for e.g. synchronous reluctance motor, involves referencing magnetic-state information with use of obtained command information and detection information, and controlling output of motor
06/05/2008DE102007047894A1 Motor control device i.e. shift range changeover control device for controlling e.g. drive shift range, of automatic transmission of vehicle, has learning device lowering torque of motor in course of execution of strike control
06/05/2008DE102006058179A1 Hochdruckreinigungsgerät und Verfahren zur Änderung von dessen Motorleistung High pressure cleaning equipment and procedures to amend its engine power
06/05/2008DE102006057213A1 Elektrische Antriebsvorrichtung Electric drive device
06/05/2008DE102006056855A1 Elektronisches Antriebssystem für ein Aggregat eines Fahrzeugs An electronic drive system for a unit of a vehicle
06/05/2008DE102005017906B4 Wärmebehandlung metallischer Werkstücke Heat treatment of metal workpieces
06/04/2008CN201069861Y Reverser speed-adjusting device for lifter
05/2008
05/29/2008WO2008062125A1 Method for controlling the driveability of the rear wheels of a vehicle and corresponding driving assembly
05/29/2008US20080121448 Energy storage and recovery for a tracked machine
05/28/2008CN201066831Y Frequency conversion execution mechanism for DC brushless servo electromotor
05/28/2008CN201066818Y Multi-rated rotate speed brushless DC electromotor for dual voltage working mode
05/28/2008CN100390414C Device and method for overload protection of compressor
05/22/2008WO2008058436A1 Electric reciprocating motion device
05/22/2008US20080116857 Control method of generator
05/21/2008CN201063578Y Automatic control device for motor
05/21/2008CN201062589Y Electric fan double-control energy-saving speed governor
05/21/2008CN101185237A Method for position and/or speed control of a linear drive
05/21/2008CN101185236A Linear motor control method and linear motor control device
05/21/2008CN101185150A Control circuit with reduced load for a bypass switch
05/21/2008CN101183845A Electric motor speed controller for vehicle
05/20/2008US7375488 Brushless repulsion motor speed control system
05/20/2008US7375346 Positioning device and method of initializing a positioning device
05/15/2008DE102006053309A1 Electrical drive for functional unit of vehicle i.e. motor vehicle, has coil arrangement including set of coils attached at commutator acting together with brushes that are connected with voltage source via voltage supply line
05/14/2008CN101179254A Power-saving device of industry high speed seamer
05/14/2008CN101179253A Three-phase clutch motor load three-phase operation, idle load single-phase operation method
05/13/2008US7372233 Method for operation of a converter circuit for a washing machine or a washer/drier, converter circuit, and washing appliance or washer/drier
05/13/2008US7372232 Apparatus for drive control, power conversion, and start-up control in a PMBDCM or two-phase SRM drive system
05/13/2008US7372228 Electric power tool with memory capability
05/13/2008US7370508 Rotor position detection in an electrical machine
05/13/2008CA2377980C Power supply circuit of an electric motor and corresponding control method
05/08/2008WO2008053441A1 System for adapting the resonant operation of a personal care appliance during the lifetime thereof
05/07/2008EP1918506A2 Home automation actuator comprising an asynchronous electric motor with variable rotation speed
05/02/2008WO2008050919A1 Apparatus and method for driving 2-phase srm
05/02/2008WO2008050918A1 Apparatus and method for driving 2-phase srm motor
04/2008
04/30/2008EP1915231A1 Method and device for the technique of cold microforging any freely formed 3-d surfaces
04/30/2008CN201054562Y Motor controller and fruit and vegetable machine using this controller
04/30/2008CN100385789C System for controlling rotary device
04/24/2008WO2008047961A1 Driving apparatus for fan using multiple him motor
04/24/2008US20080094603 Magnetic levitation wafer stage, and method of using the stage in an exposure apparatus
04/23/2008CN201051735Y Single phase motor drive device
04/23/2008CN101166011A Trolley motor control circuit
04/22/2008US7362003 Coil switching circuit for linear electric generator
04/10/2008WO2008040135A1 Method for the bidirectional control of an electric motor for a surgical or dental instrument
04/10/2008DE102007011682A1 Air supply unit for fuel cell in motor vehicle, has electric machine with two galvanically independent three-phase subsystems with redundant characteristics, and six-phase subsystem operating in case of failure of both subsystems
04/09/2008EP1908427A1 Bidirectional control method for an electric motor for surgical or dental instrument
04/03/2008WO2008038695A1 Method for controlling ac linear motors, device for driving ac linear motors, and system of ac linear motors
04/03/2008WO2008010213A3 Variable voltage supply system
04/03/2008WO2007120264A3 Application of a switched reluctance motion control system in a chiller system
04/02/2008CN101156310A Heat treatment of metal work pieces
04/02/2008CN101154916A Method for forming high-torque high-efficiency high-voltage variable-power intelligent-driving motor system
04/02/2008CN101154912A H bridge control system and its control method
03/2008
03/27/2008DE102007042435A1 Single phase synchronous motor for use in cooling and/or freezing device, has measuring device measuring phase shift of current and voltage, and evaluation device obtaining statement that whether engine is started based on measurement value
03/26/2008EP1903667A1 Operating Electrical Machines from a DC link
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