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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...
8305019 Torque controller for permanent magnet synchronous motor  
When output voltage V1 of an electric power converter reaches a prescribed voltage V1*ref, a difference between V1 and V1*ref is integrated to correct a commanded torque to τo* (τ*=τo*+Δτ).
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...
8294413 Induction motor control systems and methods  
A control system is provided for an inverter assembly associated with an induction motor. The system includes a current determination module configured to generate q- and d-axis current commands...
8288978 Motor driver  
A motor driver, including a bridge circuit including a switching element and a diode, connecting with a coil terminal of each phase of a polyphase motor; a modulator modulating a voltage value...
8283880 Motor drive device with function of switching to power regenerative operation mode  
A motor drive device including a converter for a power running operation and a power regenerative operation. The converter has power switching elements, a first power regenerative control unit for...
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...
8278865 Control device  
A control device that controls a plurality of inverters respectively provided corresponding to a plurality of alternating-current electric motors so as to control the plurality of...
8269450 Winding switching apparatus and winding switching system  
A winding switching apparatus includes a winding switching device and a drive circuit. The winding switching device is configured to switch a plurality of windings of an AC motor. The drive circuit...
8258739 Power converter  
A power converter includes: a determination section which, prior to an actual operation, determines presence/absence of a common mode filter connected to a line for supplying power to a motor,...
8253370 Microcomputer for controlling ultrasonic motor, and method for controlling ultrasonic motor  
A microcomputer that controls an ultrasonic motor includes a storage unit that stores a compare register value, and a digital/analog (D/A) conversion set value, a D/A converter that generates an...
8248013 Fan device with improved speed control module and plural fan system constructed thereby  
A fan device with improved speed control module includes a stator, a rotor, and a speed control module. The stator has a driving unit outputting currents for the stator to generate alternative...
8242735 Method and system for temperature-based power converter control  
A method of controlling a power converter in an electric drive machine is disclosed. The method may include determining a first switching frequency and determining a second switching frequency. The...
8232760 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...
8217597 Drive circuit for a capacitive load  
A drive circuit comprising: a direct current power source; a control unit for supplying control signals; a power switch topology comprising a first switch and a second switch each having an input...
8207692 Mooring winch and a method for controlling a cable of a mooring winch  
An electrically driven mooring includes a winding drum (101), an alternating current motor (103) arranged to drive the winding drum, a frequency conversion unit (104) connected to the alternating...
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...
8198848 System and method for compensating characteristics of a fan  
A system for compensating the characteristics of a fan, applied to a heat-dissipating fan of an electronic device. This system comprises of an analyzing module for analyzing the relation between...
8183817 Apparatus for switching windings of AC three-phase motor  
A winding switching apparatus for switching windings of an AC three-phase motor is provided. In each winding switching section of the winding switching apparatus, a positive-side charging resistor,...