Matches 1 - 50 out of 65 1 2 >


Match Document Document Title
US20050146305 Converter system, method, and converter  
A converter system and method, including: at least one supply module, which provides a unipolar, intermediate circuit voltage; one or more drive modules, which may be powered from the intermediate...
US20070278988 Common mode filter for motor controllers  
A motor drive circuit has a converter for coupling to an AC voltage source and an inverter coupled to the converter for providing a drive current for a motor. A common mode circulation loop is...
US20090128083 MOTOR DRIVE WITH VAR COMPENSATION  
Apparatus and methods are disclosed for providing VAR compensation using an AC motor drive, in which an off-line motor drive is configured to prevent power transfer to a motor load output, with a...
US20090108797 METHOD FOR DRIVING AN ASYNCHRONOUS MOTOR AND PUMP ARRANGEMENT WITH ASYNCHRONOUS MOTOR  
A method for driving an asynchronous motor operated at an adjustable three-phase frequency to a predetermined target rotational speed is disclosed. For controlling the asynchronous motor in an...
US20080218118 Efficiency Maximization Control and Variable Speed Drive of Single Phase Induction Motors  
A control method and a control system for single phase induction motors driven by two-power electronic switch inverter are disclosed. The system fulfills two main tasks i.e. precise motor speed...
US20110297486 FORKLIFT  
[Object] To enable stable cargo handling operation and high-efficiency recovery of regenerative electric power by means of simple configuration.[Solution]In a forklift which includes linear...
US20070216244 Motor with rotor supporting windings  
The present invention relates to the use of stator windings of an induction machine to provide both rotation of the rotor and active rotor positioning within the stator frame by modification of...
US20090212734 TORQUE LIMIT OF PM MOTORS FOR FIELD-WEAKENING REGION OPERATION  
The invention includes a motor controller and technique for controlling a permanent magnet motor. In accordance with one aspect of the present technique, a permanent magnet motor is controlled by...
US20150048774 THREE-PHASE AC INDUCTION MOTOR CONTROL DEVICE AND THREE-PHASE AC INDUCTION MOTOR CONTROL METHOD  
Disclosed is a three-phase AC induction motor control device for controlling a torque based on a two-axis orthogonal coordinate system in synchronization with a power supply angular frequency, the...
US20090224721 VARYING FLUX VERSUS TORQUE FOR MAXIMUM EFFICIENCY  
A motor in an electric vehicle can be controlled by receiving a torque command value, calculating a first flux value corresponding to a determinable efficiency of the electric vehicle at the...
US20090115269 ELECTRIC MOTOR CONTROL WITH BUCK BOOST CONVERTER  
A power supply for an electric motor includes a converter that can increase and decrease a voltage supplied into an inverter and then into the stator windings of the motor. As a separate feature,...
US20070164701 Three-phase ac speed adjustable motor  
A three-phase AC speed adjustable motor relates to the motor speed adjusting technique in the field of electrical engineering. Said three-phase AC speed adjustable motor is composed of an AC motor...
US20090033274 SYSTEM FOR USING A MULTI-PHASE MOTOR WITH A DOUBLE-ENDED INVERTER SYSTEM  
Systems and apparatus are provided for an inverter system for use in a vehicle having a first energy source and a second energy source. The inverter system comprises an electric motor having a...
US20080116841 SEMICONDUCTOR DEVICE, MOTOR DRIVE DEVICE AND AIR CONDITIONING MACHINE  
The semiconductor device according to the present invention generates pulse width modulation signals for controlling inverter circuits that drive a motor. The semiconductor device includes: a...
US20060103342 Motor drive device for air conditioner  
A motor drive device for an air conditioner has a converter, a three phase inverter and a control means. The converter uses an AC power source as an input source. The three phase inverter receives...
US20080265829 Inverter apparatus and a semiconductor device used for the same  
FIGS. 4A and 4B are principle diagrams for correcting deviations among current detectors of a three-phase motor 19 in an inverter apparatus of the present invention, which includes bidirectional...
US20060197491 Low voltage, two-level, six-pulse induction motor controller driving a medium-to-high voltage, three-or-more-level ac drive inverter bridge  
A method and circuit enabling off-the-shelf controllers designed for use with a two-level AC drive inverter bridge (1920) to drive inverter bridges with three-or-more levels. Signals from an...
US20060267541 Motor drive inverter that includes III-nitride based power semiconductor devices  
An inverter for driving a motor includes one or more power stages for producing one or more power signals for energizing the motor, each power stage including first and second III-nitride based...
US20080157709 HIGHLY RESPONSIVE PERMANENT MAGENT MOTOR CONTROLLER  
Current command values are used instead of detected current values to estimate axis error by calculation. An axis error command value is generated according to a speed command value, and a...
US20090134835 ELECTRIC MOTOR DRIVE SYSTEMS, MOTOR VEHICLES, AND METHODS OF PHASE CURRENT REGULATION  
In various embodiments, an electric motor drive system (400, FIG. 4) and a motor vehicle (1000, FIG. 10) include an inverter (404, FIG. 4) adapted to generate (604, FIG. 6), based on inverter...
US20100079103 ALTERNATING-CURRENT MOTOR CONTROL APPARATUS  
An alternating-current motor control apparatus includes a stator frequency computing unit configured to compute a stator frequency of a motor magnetic flux; a torque error computing unit...
US20070040532 Motor controller and control method thereof, and error detecting apparatus of inverter  
A motor controller, including: a power supply which supplies DC power; an inverter which converts the DC power into AC power to be supplied to a motor; a shunt resistor which connects the power...
US20080211450 ROTATING MACHINERY CONTROLLER  
A rotating machinery includes a first control member for performing rectangular wave control by operating the switching devices of an inverter such that an on-state and an off-state occur once for...
US20090140676 METHOD AND SYSTEM FOR SENSORLESS CONTROL OF AN ELECTRIC MOTOR  
Methods and systems for controlling an electric motor are provided. A signal comprising at least first and second cycles is provided to the electric motor. A first flux value for the electric...
US20080030163 Controller for motor  
To provide a controller for a motor that can appropriately set the induced voltage constant of a motor of a double rotor type according to the operational state of the motor and expand the...
US20080007196 APPARATUS AND METHOD FOR DRIVING AN INDUCTION MOTOR  
An induction motor drive includes a plurality of inverters, a changeover switch which changes over outputs of the plurality of inverters to be supplied to one induction motor and a changeover...
US20080048606 VECTOR CONTROLLER FOR A PERMANENT MAGNET MOTOR AND INVERTER MODULE  
In a system in which current is detected in an inexpensive manner or in a system in which a position detector is omitted, the present invention provides a high-efficiency vector controller for a...
US20110132899 CONVERTER CIRCUIT AND MOTOR DRIVE APPARATUS, AIR-CONDITIONER, REFRIGERATOR, AND INDUCTION HEATING COOKER PROVIDED WITH THE CIRCUIT  
To obtain a converter circuit capable of being made to be small and light-weighted and reducing switching loss, a motor drive control apparatus, an air-conditioner, a refrigerator, and an...
US20100219788 High phase order AC Machine with Short Pitch Winding  
A high phase order alternating current rotating machine is disclosed having an inverter drive that provides more than three phases of drive waveform of harmonic order H, and characterized in that...
US20110181231 CONTROL DEVICE AND CONTROL METHOD FOR AC MOTOR  
A voltage command generation unit generates a voltage command value, based on a current deviation relative to a current command value. A dq-axis voltage filter generates a voltage command value...
US20140320059 CONVERTER CIRCUIT AND MOTOR DRIVE CONTROL APPARATUS, AIR-CONDITIONER, REFRIGERATOR, AND INDUCTION HEATING COOKER PROVIDED WITH THE CIRCUIT  
A converter circuit capable of being compact and light-weight and capable of reducing switching loss, a motor drive control apparatus, an air-conditioner, a refrigerator, and an induction heating...
US20080061728 MOTOR CONTROL DEVICE AND CURRENT DETECTING UNIT  
A current detecting unit detects three phase current of a three-phase inverter from current flowing between the inverter and a DC power supply. The current detecting unit includes a specified...
US20090001923 SYSTEMS AND METHODS FOR OPERATING Z-SOURCE INVERTER INDUCTORS IN A CONTINUOUS CURRENT MODE  
Systems, apparatus, and methods for operating inductors in a Z-source inverter in a continuous current mode are provided. One system includes an AC motor, a Z-source inverter, and a processor. The...
US20080157710 BEAT-LESS CONTROLLER FOR PERMANENT MAGNET MOTOR  
In a driving system for an inverter that uses a diode rectifying circuit to convert a single-phase or three-phase AC voltage to a desired DC voltage and drives a permanent magnet motor, a...
US20070216340 Method of Decelerating Alternating Current Motor and Inverter Apparatus  
To be able to reduce a speed of an alternating current motor by an inverter apparatus by a time period as short as possible and to control an alternating current motor which is easy to be...
US20050012489 High frequency pulse width modulation  
An electronic device is provided that achieves a reduction in the amount of unwanted noise produced as a consequence of electrical switching associated with pulse width modulation. The electrical...
US20090184678 PERMANENT MAGNET AC MOTOR SYSTEMS AND CONTROL ALGORITHM RESTART METHODS  
Permanent magnet alternating current (PMAC) motor systems and methods for starting or restarting PMAC motor system sensorless control algorithms are provided. One system includes a PMAC motor...
US20080246431 Apparatus and method of driving compressor  
Disclosed herein are an apparatus and method for driving a compressor, which are capable of being suitably used for driving a refrigeration system such as a refrigerator with high efficiency and...
US20120025749 CONTROL SYSTEM OF THREE PHASE INDUCTION MOTOR DRIVER AND FIELD WEAKENING CONTROL METHOD THEREOF  
A control system of a three phase induction motor driver and a field weakening control method. The control system includes a driver control module, a field weakening control module, an AC power...
US20120013287 SENSORLESS INDUCTION MOTOR CONTROL DEVICE HAVING FUNCTION OF CORRECTING SLIP FREQUENCY OF MOTOR  
A sensorless induction motor control device with a function of correcting a slip frequency wherein a slip frequency estimation unit estimates the slip frequency from at least one kind of current...
US20090251096 METHOD AND APPARATUS FOR TORQUE RIPPLE REDUCTION  
Methods and apparatus are provided for reducing torque ripple in a permanent magnet motor system comprising a permanent magnet motor coupled to an inverter. The method comprises the steps of...
US20080007197 Inverter-driven rotating machine system, rotating machine and inverter used in the same and electric vehicle using the same  
The present invention provides an inverter-driven rotating machine system improved in insulation reliability, a rotating machine and inverter used in the system and an electric vehicle using the...
US20100117587 METHOD FOR FIELD-ORIENTED OPERATION TO ZERO SPEED OF AN ENCODER-LESS ASYNCHRONOUS MACHINE  
In a method for field-oriented operation to zero speed of an encoder-less asynchronous machine, wherein the associated field-oriented regulation device has a monitor with a machine model and...
US20080179122 ELECTRIC MOTOR CONTROL SYSTEM, SERIES HYBRID VEHICLE, ELECTRIC MOTOR CONTROL APPARATUS, AND ELECTRIC MOTOR CONTROL METHOD  
An electric motor control system including a generator, an AC motor, a power converter for driving the AC motor using a DC output voltage of the generator, and an electric motor controller for...
US20090179608 METHOD AND SYSTEM FOR CONTROLLING A POWER INVERTER IN ELECTRIC DRIVES  
Methods and systems for controlling a power inverter in an electric drive system of an automobile are provided. A signal controlling the power inverter is modified utilizing a first voltage...
US20070257633 APPARATUS AND METHOD OF CONTROLLING SYNCHRONOUS RELUCTANCE MOTOR  
An apparatus for driving a motor includes a rectifier which rectifies input alternating current (AC) power, a power converter which converts the rectified AC power into direct current (DC) power,...
US20110221382 MOTOR CONTROL METHOD AND APPARATUS AND ELECTRIC POWER STEERING SYSTEM  
In a motor control method for driving a three-phase motor by an inverter, a dead time compensation operation is performed to compensate for output voltage loss caused by a dead time, in which both...
US20140300309 SENSORLESS VECTOR CONTROL APPARATUS FOR INDUCTION MOTOR  
A sensor-less vector control apparatus for induction motor enhanced in performance of sensor-less vector control by estimating changes in parameters in real time is provided, the apparatus...
US20080007190 Motor control apparatus and on-vehicle motor drive system  
It is an object of the present invention to provide a motor control apparatus and on-vehicle motor drive system which can easily protect components of an inverter from overvoltage even if surplus...
US20120076277 ASYNCHRONOUS MOTOR WITH FEATURES CREATING MAGNETIC FIELD DISTURBANCE  
A component for introducing disturbances into the magnetic field of an asynchronous motor by altering a reluctance of the motor is disclosed. An asynchronous motor is provided that includes a...

Matches 1 - 50 out of 65 1 2 >