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9018970 Method of testing partial discharge of rotating electrical machine driven by inverter  
In a rotating electrical machine, a conductive foil or conductive rubber is applied to the surface of insulation layer of a conductor series connection area or to the surface of insulation layer...
9018872 Motor control circuit  
To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate advance angle value corresponding to the speed of the motor that is set can be automatically...
8988016 System and method for traction motor control  
A control method comprises determining wheel creep of a wheel operably coupled to a traction motor and limiting a rate of change of an excitation frequency applied to the traction motor to drive...
8988035 System for determining a magnetizing curve and rotor resistance of an induction machine and method of making same  
A system for identifying magnetizing inductance and rotor resistance of an induction machine comprises an induction machine comprising a rotor and a stator, a DC voltage bus, and a DC-to-AC...
8924051 Drive device for railway vehicle  
A control device for a railway vehicle controls an inverter device based on a direct-current link voltage Vfc between the opposite terminals of a filter capacitor. A direct-current voltage applied...
8912744 Method and apparatus for dynamically adjusting a dead time of brushless direct current motor during a phase change  
A method and apparatus for dynamically adjusting a dead time of a BLDC motor during a phase change detect the winding current of the BLDC motor during the dead time, and terminate the dead time...
8872455 Method and controller for an electric motor with fault detection  
For each phase of a controller, semiconductor switches comprise a high side switch and a low side switch. A direct current voltage bus provides electrical energy to the semiconductor switches. A...
8860342 System and method for controlling a permanent magnet motor  
A system. The system includes a processor, a first module, a second module and a third module. The first module is communicably connected to the processor and is configured for calculating a...
8854015 Current controller and generator system  
A current controller for controlling plural stator currents of plural stator windings of an electrical machine, in particular a generator, is provided, wherein the plural windings are separately...
8853987 Electric tool  
In an electric tool, in order to carry out a phase control or an antiphase control using a transistor, constant voltage generating means of the tool includes a series circuit including a resistor...
8823302 Control apparatus for switching circuit  
A control apparatus for a switching circuit includes a controller, a target-rotational-speed acquiring device, a target-torque acquiring device, and an ON-time varying device. The controller is...
8816615 Drive device for railway vehicle  
In a drive device for a railway vehicle, in which regeneration braking force is increased by adding the output voltage of a voltage adjustment device to a DC power source voltage, operation of the...
8766563 Drive arrangement for the motor-driven adjustment of an adjustable element in a motor vehicle  
Described herein is a drive arrangement for the motor-driven adjustment of an adjustable element in a motor vehicle, the drive arrangement having two electrical drives and a control device, the...
8766589 Motor control unit and vehicle steering system  
In a motor control unit, a current-carrying failure detection unit determines a first determination condition and a second determination condition. The current-carrying failure detection unit...
8736218 Power supply device for electric vehicle  
The present invention provides a power supply device for an electric vehicle that allows highly efficient operation of a compressor inverter. A power supply device for motor vehicle 10 has: a main...
8710782 Parallel power inverter motor drive system  
Multiple inverter motor drives are interconnected in parallel to provide a common output to a motor. Common control circuitry is coupled to all parallel drives via optical cables and provides...
8664907 Fast switching for power inverter  
An apparatus includes an inverter including a high-side switch coupled to a low-side switch, the inverter generating a time-varying drive current from a plurality of drive control signals, a...
8618765 Apparatus and method of controlling an electric oil pump driving motor  
In an apparatus for controlling a sensorless electric motor that drives an electric oil pump, in a case where a rotational speed of the motor deviates from a first range defined between a first...
8584459 Engine induction system  
A forced induction system for an engine comprising a compressor for increasing the pressure of gas into the engine and a turbine arranged to be driven by engine exhaust gas. The system further...
8575879 Methods, systems and apparatus for controlling a multi-phase inverter  
Embodiments of the present invention relate to methods, systems, a machine-readable medium operable in a controller, and apparatus for controlling a multi-phase inverter that drives a multi-phase...
8558497 Reduced electromagnetic interference for pulse-width modulation  
A method and apparatus to drive a load using a pulse-width modulated (PWM) signal and spread a spectrum of the PWM signal across a plurality of frequencies while maintaining a constant duty cycle...
8541962 Motor driving apparatus  
A motor driving apparatus includes a motor driving unit, a low-voltage source, a current detecting element, and an insulation resistance degradation determinator. The motor driving unit includes...
8519653 Control device and control method for AC motor  
A control device for performing PWM control of an inverter includes a synchronous PWM control circuit for generating a control command for the inverter by performing PWM control based on a...
8513911 Power converters  
A power converter that interfaces a motor requiring variable voltage/frequency to a supply network providing a nominally fixed voltage/frequency includes a first rectifier/inverter connected to a...
8497649 Motor driving control apparatus for controlling motor output according to power characteristics of AC power supply  
A motor driving control apparatus includes a motor driving unit which drives a motor and a driving control unit which supplies to the motor driving unit a command value for the motor driving unit...
8421398 Power control for induction motors using variable frequency AC power  
An autonomous controller allows an AC induction motor to operate over a broad range of AC power supply frequencies by reducing the amount of current supplied to the motor at lower frequencies. The...
8410746 Inverter circuit for vehicles  
The present invention provides an inverter circuit for a vehicle, which includes: a switching unit that includes a plurality of switching elements and switches a direct current into an alternating...
8405344 Method and apparatus for estimating a rotation speed of an electric motor  
A method is disclosed for estimating a rotation speed of an electric motor supplied by an inverter, by determining a time derivative of a stator current vector of the electric motor during a zero...
8339093 System and method of dynamic regulation of real power to a load  
A system and method for controlling an AC motor drive includes a control system programmed with an energy algorithm configured to optimize operation of the motor drive. Specifically, the control...
8340848 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...
8294411 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...
8283885 Driver circuit  
A drive control signal is effectively obtained. An offset control circuit (32) adds an offset to a rotational state signal. An added signal is obtained by adding an offset to the rotational state...
8264191 Load commutated current source inverter  
A motor drive system using a current source inverter (CSI) for providing the main power and an active filter for providing the reactive power and harmonics is disclosed. The CSI can be a...
8264190 Control apparatus for multi-phase rotary machine and electric power steering system  
A control apparatus for a multi-phase rotary machine includes a control unit and a plurality of power supply systems including respective inverter units. When a short-circuiting failure occurs in...
8259474 Pulse width modulation control of a matrix converter  
A matrix converter includes a plurality of switching elements and is adapted to receive a multi-phase alternating current (AC) input signal having an input frequency and to generate a multi-phase...
8222857 Motor controlling device  
In a controlling device for a permanent magnet synchronous motor, an asynchronous pulse mode is switched to a synchronous pulse mode in a situation where a modulation factor has become equal to or...
8207700 Electric motor drive  
The invention relates to a switch arrangement of an electric motor drive (1). The electric motor drive comprises safety switches (3) determined by the safety of the drive, a controlled mechanical...
8198837 Device and method for measuring and controlling the speed and torque of a DC motor  
A DC motor control device calculates motor speed using determinations of motor field flux and armature voltage in the motor. The device includes a control module having one or more control inputs...
8188694 Parallel power inverter motor drive system  
Multiple inverter motor drives are interconnected in parallel to provide a common output to a motor. Common control circuitry is coupled to all parallel drives via optical cables and provides...
8188702 Rotating electrical machine control system and vehicle drive system  
A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for...
8183816 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...
8174222 Methods, systems and apparatus for dynamically controlling an electric motor that drives an oil pump  
Methods, system and apparatus are provided for sensorless control of a vector controlled motor drive system that includes an electric motor used to drive an auxiliary oil pump.
8154241 In-vehicle electronic control apparatus and steering control system  
An electric power steering system includes a multi-phase electric motor, an inverter connected to the rotary electric machine and an electronic control apparatus. One phase of the motor is pulled...
8143837 Inverter control apparatus  
An inverter control apparatus includes: a state estimator that calculates an estimated current vector and an estimated magnetic flux vector from a motor command voltage vector, a detected current...
8143839 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...
8129936 Open-loop and/or closed-loop control system of a 3-phase power converter for the operation of an asynchronous machine  
An open-loop and/or closed-loop control device for operating an asynchronous machine which is fed by a 3-phase power converter. The open-loop and/or closed-loop control structure has a stator flux...
8125178 Drive and method  
A drive and a method, including an electric motor, which is supplied by a rectifier, the rectifier including a time-discrete closed-loop control structure, which regulates the stator current of...
8125179 Controlling a power of an electrical motor  
A motor control circuit (MC) comprising input terminals (IT1, IT2) to receive a rectified input voltage (Vrm), and output terminals (OT1, OT2) to supply a motor drive signal (Vm). A switching...
8076884 Control apparatus for electric vehicles  
A motor control apparatus for an electric vehicle has an AC motor system including a power conversion unit and a motor/generator. The power conversion unit performs conversion between DC power and...
8076898 Method of brushless DC motor control and its application  
The invention relates to electric engineering, in particular to methods for controlling an ac electronic motor. The inventive control method consists in starting and rotating a rotor upon EMF...

Matches 1 - 50 out of 345 1 2 3 4 5 6 7 >