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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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).
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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.
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8164297 |
Power converter and motor driving system
An object of the present invention is to provide a power converter in which the open-phase can be detected in a broader frequency region even if a predetermined relation is kept between the output...
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8159177 |
System for realizing rotor variable frequency speed control asynchronously and simultaneously by driving multiple motors via one inverter
A system for realizing rotor variable frequency speed control asynchronously and simultaneously is disclosed. Multiple motors are driven via one inverter, which consists of a motor group, a...
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8159162 |
Motor control apparatus, vehicle fan drive apparatus, and motor control method
A motor control apparatus has a start control section. When the motor control apparatus receives a motor start command from a host control unit when a motor is in a stop state or a low-speed...
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8143840 |
Device for controlling induction motor
A device for controlling an induction motor includes a voltage/frequency controller, a pulse width modulation controller, and a converter. The voltage/frequency controller receives a controlling...
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8143838 |
Phase current estimation apparatus for motor and magnetic pole position estimation apparatus for motor
A phase current estimation apparatus for a motor capable of suitably improving estimation accuracy of phase currents is provided. The phase current estimation apparatus 10 of the motor includes a...
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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 configured...
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8138712 |
Motor drive system and its control method
A ripple detection unit detects a ripple current width of a motor current controlled according to PWM control. A ripple reference setting unit sets a reference value of the ripple current width. A...
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8138711 |
Motor controller of air conditioner and method of the motor controller
The present invention relates to a motor controller for an air conditioner and a motor control method. The motor controller including a converter converting AC utility power into DC power and an...
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8134323 |
Bypass and synchronous transfer arrangement for a medium voltage drive control system
A medium voltage variable frequency drive having a 2-high controller configuration with a dual bus system is described. The drive control system includes at least one motor control cabinet housing...
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8120296 |
Motor magnetic pole position detecting device
A motor magnetic pole position detecting device includes a detection current command generation unit generating a detection AC current command, a current detection section detecting a current...
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8115433 |
Electrical system for pulse-width modulated control of a power inverter using phase-shifted carrier signals and related operating methods
Systems and methods are provided for pulse-width modulated control of power inverter using phase-shifted carrier signals. An electrical system comprises an energy source and a motor. The motor has...
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8115430 |
Methods, systems and apparatus for controlling operation of two alternating current (AC) machines
A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase...
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8115441 |
On-line measurement of an induction machine's rotor time constant by small signal d-axis current injection
A controller continually updates rotor time constant estimation of an induction machine by interrogating the induction machine with a small signal oscillation and monitoring the response. The small...
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8106620 |
Vector control device for alternating-current electric motor
There is provided a vector control device for an alternating-current electric motor having a damping controller which automatically calculates an optimum damping operation amount and does not...
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