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8878412 Alternating current electric induction motor with auxiliary closed loop toroidal winding  
Alternating current electric induction motor, in particular a motor (12-22) which is fed by a frequency variator, comprising a casing (4) which supports a rotor (9) by means of roller bearings (8)...
8872464 Motor control method  
A motor control method comprises: inputting a PWM signal into a control unit for the control unit to obtain a direction command and a speed command by an identification rule, and generating a...
8866435 Control device and control method for power control unit  
A control device controls an inverter controlling an output of a motor by PWM control. The control device calculates a reference frequency based on a torque and a rotation speed of the motor,...
8853990 Inverter device of rotating electrical machine, and driving method for rotating electrical machine  
An inverter device of a rotating electrical machine drives a multiphase rotating electrical machine having the variable number of rotations using a switching element provided for each phase. An...
8847542 Device and method for controlling motor  
In order to lower electromagnetic noise, normally, a carrier frequency of a inverter or controlling drive of a motor mounted on an electrically powered vehicle is changed periodically or randomly...
8841876 Control of an electrical machine  
A method of controlling an electrical machine that includes exciting a phase winding with a supply voltage, and freewheeling the phase winding when current in the phase winding exceeds a threshold....
8829829 Apparatus for calculating rotational position of rotary machine  
In a system, a superimposing element sets a command value vector of a high-frequency voltage signal and superimposes the high-frequency voltage signal with the command value vector on an output...
8823307 System for detecting internal winding faults of a synchronous generator, computer program product and method  
A system, method and computer program product for monitoring including detecting internal faults especially inter-turn faults of a synchronous generator and thus protecting the synchronous...
8810182 Adaptive harmonic reduction apparatus and methods  
Power conversion systems with active front end converters for example motor drives and power generation systems for distributed energy sources are presented with adaptive harmonic minimization for...
8796975 Soft-start and soft-lock start on motor driving apparatus  
A motor driving apparatus is disclosed herein and includes a control unit, a soft-start unit and an output unit. When power-up or lock release situation, an external PWM driving signal is inputted...
8791664 Systems and methods for adaptive torque adjustment and motor control  
A system includes a target speed module and a pulse-width modulation (PWM) control module. The target speed module is configured to provide a first waveform based on a first speed setting for a...
8766579 Method and device for monitoring and correcting a sensorless rotor position detection in permanently excited motors  
The invention relates to methods and devices for monitoring and correcting a sensorless rotor position detection in permanently excited motors, comprising a control device and a current converter....
8766588 Rate limited common mode control for pulse-width modulation drives  
A method for pulse width modulation control of a multiple phase drive includes identifying at least one phase from the plurality of phases for the drive as eligible for clamping to one of a...
8760106 Common mode hysteresis for pulse-width modulation drives  
A method for pulse width modulation control of a multiple phase drive includes identifying at least one phase from the plurality of phases for the drive as eligible for clamping to one of a...
8733189 Combination transmission selector and speed sensor  
A combination module for an appliance includes a transmission selector mechanism adapted to selectively operate transmission shift structure of the appliance, and a speed sensor mechanism adapted...
8736220 Inverter control device and power conversion device  
A DC voltage value from a DC voltage detection section is input directly to a voltage correction section without passing through a compensator or a filter. Therefore, even when rapid voltage change...
8729846 Motor drive system and control method thereof  
A motor drive system includes an inverter that supplies power to a three-phase motor, and a control unit that, when first stopping and then commencing supply of alternating current to three phases...
8729844 Power converter with asymmetric phase shift autotransformer for alternating current (AC) motor  
An AC-AC power converter supplies AC power to an AC motor having a plurality of motor windings and a case connected to a ground. The AC-AC power converter architecture includes an asymmetric phase...
8681516 Inverter with short circuit protection  
An inverter has a current sensor that senses a low side current before a high side of the inverter is permitted to power up. If an over-current situation is detected on the low side, powering up is...
8638054 Sensorless lost/found rotor detection for permanent magnet motors  
Various methods of detecting a found rotor, a lost rotor, a locked rotor and a caught rotor after a power disruption using flux estimates are disclosed. Also disclosed are permanent magnet motor...
8638154 System clock monitoring apparatus and motor control system  
A mode determination circuit is configured to determine whether there is a status change of the electric system associated with a frequency variation of a system control clock, and a clock change...
8629634 Apparatus and method for optimizing current use during control of multiple motors  
A method for is disclosed for using pulse-width modulated (PWM) signals in the control of a plurality of electric motors or of at least one electric motor with multiple windings. The method...
8624533 Inverter power generator  
An inverter includes a voltage command generator generating a voltage command value according to an externally specified voltage value, a PWM signal generator generating a PWM signal according to...
8587239 Apparatus and method for sensorless identification of rotating electrical equivalent circuit parameters of a three-phase asynchronous motor  
Identification of electrical equivalent circuit parameters (15) of a three-phase asynchronous motor (09) without a shaft encoder. The method comprises—Assumption of a standstill position of the r...
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...
8577527 Drive control device for a vehicle  
A drive control device which estimates an engine torque during traveling in a fixed gear ratio mode is disclosed. The drive control device includes the engagement mechanism including the revolution...
8575882 Power layer generation of inverter gate drive signals  
Solid state switches of inverters are controlled by timing signals computed in power layer interface circuitry for individual inverters. Multiple inverters may be placed in parallel with common...
8575878 Energy converter  
An energy converter includes a magnetism generation mechanism unit that generates a magnetic field when connected to an AC electrical power source, and a rotating mechanism unit having a single...
8547072 Phase control apparatus  
A phase control apparatus includes a first transistor whose source or emitter is connected to one end of an AC power supply and whose drain or collector is connected to one end of a load, a second...
8541972 Method for suppressing speed ripple by using torque compensator based on activation function  
Disclosed is a method for suppressing a speed ripple occurring during an operation of an AC motor by using a torque compensator based on an activation function. The method includes the steps of...
8531150 DCDC converter  
A DCDC converter includes a switching circuit, to an input end of which an input filer circuit is connected, a smoothing filter circuit connected to an output end of the switching circuit and...
8525464 Rotation detecting apparatus and rotation detecting system  
A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current...
8508181 Adjustable frequency drive and system  
An adjustable frequency drive includes a base having a first portion and a second portion, and an active front end converter disposed on the base. The converter includes an input, an output, and a...
8432112 Sensorless lost/found rotor detection for permanent magnet motors  
Various methods of detecting a found rotor, a lost rotor, a locked rotor and a caught rotor after a power disruption using flux estimates are disclosed. Also disclosed are permanent magnet motor...
8400089 Control electronics for brushless motors  
An electronic control circuit for a brushless motor has an input power circuit providing a DC voltage and a microcontroller integrated circuit receiving the DC voltage. The microcontroller...
8390229 Washing machine with improved method of braking to a non-zero speed  
A method of braking a washing machine from an operational speed to a reduced non-zero speed is provided (as well as a washing machine incorporating the method) for a washing machine driven by one...
8384337 Conveyor system  
A conveyor system includes an electric motor to move a conveyor. A voltage determining device is coupled to an alternating-electricity source that supplies alternating electricity to the conveyor...
8373379 Methods and devices for estimation of induction motor inductance parameters  
Methods and devices are presented herein for estimating induction motor inductance parameters based on instantaneous reactive power. The induction motor inductance parameters, e.g., the stator...
8362733 Output filter and motor drive system including the same  
A motor drive system includes: a three-phase motor; a power conversion device that supplies power for driving the three-phase motor; and an output filter that is arranged between an output of the...
8362723 Motor drive circuit  
The motor drive circuit 100 supplies a drive current to the motor 2 to drive the motor. Each of the first Hall amplifier HAMP1 to the third Hall amplifier HAMP3 is provided for each phase of the...
8362732 Motor phase winding fault detection method and apparatus  
A method of detecting a phase winding fault in a multi-phase electric machine is executable via a motor controller, and includes measuring feedback signals of the machine, including each phase...
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 motor...
8339078 Apparatus and method for providing information relating to a motor  
This invention relates to an apparatus and method for deriving speed and position information for an electric motor. Apparatus for and a method of controlling a motor 100 are also disclosed. The...
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...
8339090 Current control apparatus operable in wet environment  
An apparatus operable in a wet environment includes a voltage doubler circuit including a pair of diodes, a pair of direct current switching elements connected between the respective diodes and a...
8334670 Method and apparatus to monitor an electric motor control circuit  
An electric motor control circuit includes an electric energy storage device electrically connected via DC power buses to an inverter circuit that connects via an alternating current circuit to an...
8314586 System for adapting the resonant operation of a personal care appliance during the lifetime thereof  
The adapting system for a resonant drive appliance includes a circuit for measuring the back EMF induced in the stator coil of the motor following turn-off of the appliance. The frequency of the...
8310102 System and method for power conversion  
A multilevel inverter is provided. The multilevel inverter includes a plurality of bridges, each bridge configured to receive a respective portion of an input DC power and convert the respective...
8310183 Motor control device  
A motor control device includes a current profile generator generating a current profile, a pilot voltage operator calculating a pilot pulse voltage, on the basis of the current profile, and adding...
8310196 Method and apparatus for failsafe monitoring an electromotive drive  
A method and an apparatus for the failsafe monitoring of an electromotive drive without additional sensors, including a drive having a three-phase control of an electric motor, detection of the...