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7626836 |
Method and apparatus for adjustable voltage/adjustable frequency inverter control
An apparatus and method for controlling an inverter, the apparatus including an adjustable frequency controller receiving a reference frequency value and generating a command frequency value as a...
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7609024 |
Auxiliary bus method
Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC...
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7545115 |
Motor control and driver for electric boosting application
The invention proposes a system for driving a compressor, comprising an induction motor ( 2 ) for driving the compressor ( 3 ), said induction motor including a squirrel cage rotor, and a...
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7501787 |
Method for controlling AC motor
An inverter that supplies a desired primary voltage (v 1 ) to an induction motor, a current detector that detects a primary current (i 1 ) from the inverter to the induction motor, a voltage...
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7479757 |
System and method for a cooling system
Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC...
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7466906 |
Motor control apparatus
A motor control apparatus includes a target value computation device which computes a target value of a current to be passed through a motor, a current detection device which detects a current...
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7463006 |
Motor and drive control device therefor
The invention provides a drive control device for the motor as well as an electric power steering apparatus using the motor and the drive control device. Respective phase current command values are...
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7451609 |
Method of controlling compressor and controller
A compressor is operable to compress refrigerant at a variable operation frequency. According to a method of controlling the compressor, the compressor starts operating, and just after that, the...
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7432683 |
PWM pattern sequence to reduce losses in voltage source inverters
A method for controlling an inverter uses sequences of predetermined states where each state uniquely corresponding to a set of control signals provided to the inverter that is coupled to a motor....
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7405534 |
Apparatus and method for controlling velocity of motor
An apparatus controlling a velocity of a motor having a rotor, includes a sensing velocity calculator sensing a rotation velocity of the motor, and calculating a sensing velocity on the basis of...
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7402919 |
Control device for motor-driven 4WD vehicle and related method
A control device controlling a motor-driven four wheel drive vehicle, where either of front wheels and rear wheels are driven by an engine and the others are driven by an AC motor, is provided with...
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7385372 |
Auxiliary bus system
Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC...
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7342380 |
System and method for adjustable carrier waveform generator
A system and method for controlling an inverter of a motor control unit includes a controller having a user interface configured to allow user selection of a waveform increment value or a waveform...
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7339344 |
Self tuning method and apparatus for permanent magnet sensorless control
A plurality of parameters of a Permanent Magnet Synchronous Motor (PMSM) is determined by a motor controller for differentiating between a plurality of PMSMs. This is achieved by first applying...
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7330012 |
High frequency bus system
Certain exemplary embodiments can comprise a system comprising an electric drive system for a machine. The system can comprise a rectifier adapted to convert AC power from an alternator to DC...
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7330011 |
Motor driving apparatus
A motor driving apparatus includes an inverter circuit for converting an output of a rectifier circuit connected to a single-phase AC power supply into a driving voltage, and outputting the driving...
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7250740 |
Method and apparatus for generating pulse-width modulated waveform
In a method of generating pulse-width modulated waveform, the cycle of a carrier wave for the waveform is determined together with a first dead time value and a second dead time value both of which...
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7239102 |
Phase adjustment circuit, motor driving control circuit, and motor apparatus
A motor apparatus is constructed to compensate for a delay in operation of the motor apparatus, so that the efficiency is improved and noise is reduced over a broad motor rpm range by driving the...
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7227331 |
Safety interlock and protection circuit for permanent magnet motor drive
A circuit for protecting against controller failure wherein the controller provides control signals for controlling a DC to AC inverter fed by a DC bus and driving a permanent magnet motor, the...
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7187155 |
Leakage inductance saturation compensation for a slip control technique of a motor drive
An electronic drive for vector control of an induction motor controls slip and operating frequency in response to changes in stator voltage. The drive includes a torque control loop, a flux control...
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7148652 |
Method and apparatus for determining and handling brake failures in open loop variable frequency drive motors
A controller for a variable frequency drive monitors electrical power from a variable frequency drive motor while a brake is maintaining a load driven or moved by the motor without requiring...
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7145310 |
Method and system for controlling permanent magnet synchronous motor
A system for controlling a permanent magnet synchronous motor calculates fundamental a d-axis (or q-axis) voltage command based on a difference between a d-axis (or q-axis) current command and a...
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7106012 |
Electronic control unit, electric power-assisted steering device and transmission ratio-variable steering unit
An electronic control unit for producing a sufficiently boosted voltage even when a supply voltage becomes high includes an inverter that drives switching elements and converts a DC voltage into an...
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7102327 |
Motor current reconstruction via DC bus current measurement
A technique for reconstructing phase currents based on measurements of a DC bus current. Non-observable regions of DC bus current samples to reconstruct phase currents are reduced in size by using...
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7084603 |
Motor control device
A motor control device that can reduce electrical noise is provided. A motor control device includes an inverter, a current controller, a high frequency wave superpositioner, and a high frequency...
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7084600 |
Power control apparatus for a turbo charger equipped with an assist motor and a motor driven turbo charging apparatus
A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the...
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7081734 |
Ride-through method and system for HVACandR chillers
A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing...
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7045988 |
Sensorless controller of AC motor and control method
A speed control apparatus having a high frequency generator for superposing a high frequency signal on an estimated magnetic flux axis. A high frequency component extractor extracts an error signal...
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7042193 |
Control apparatus for rotating machine
In a control apparatus for a rotating machine, an integration unit integrates a primary angular frequency based on an angular velocity command and computes phase, a power converting unit applies...
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7034478 |
Digital spindle control architecture
A three-phase spindle motor has three terminals each driven with pulse width modulated signals. Rotation of the motor is controlled by iteratively measuring an electrical period of the motor,...
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7026786 |
Reduced part count feedforward motor control
A system for controlling a motor comprising: a voltage source; a motor in operable communication with an inverter, the motor responsive to a command signal from the inverter, the inverter is in...
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7023172 |
Motor controller
An electric motor control apparatus of this invention estimates changes in temperature of a semiconductor device to compute temperature change amplitude 108 based on an output current signal 105...
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7005824 |
Shutter mechanism including stepping motor control apparatus with upper and lower limit stopping position control
A shutter mechanism includes a drum ( 2 ), a stepping motor ( 5 ), a driver ( 20 ), a microcomputer ( 10 ), a memory ( 16 ), and a load magnitude detection circuit ( 30 ) that detects the magnitude...
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6995540 |
Electric motor car controller
An electric motor car controller includes a voltage detector for detecting the voltage across a filter capacitor, an energy amount calculator for calculating the amount of energy of the filter...
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6977475 |
Automotive electric power supply apparatus
Each of the phases of coil in an armature winding of a dynamoelectric machine is constructed so as to have six turns, an inverter has a plurality of element-diode sets, each element-diode set...
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6969963 |
PWM controlled motor drive
The motor driver having a plurality of output circuits each having two switching elements connected in series includes: a phase switch circuit for putting a switching element on one side of one...
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6933843 |
Data storage module for a security system
An independent back memory module is disclosed that is permanently installed at a security gate installation. The memory module has a nonvolatile memory and it is positioned within the system so...
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6876171 |
Driving apparatus and method of three phase induction motor
A driving apparatus of a three-phase induction motor includes: a three-phase power supply unit for supplying three-phase power; a rectifier for rectifying the three phase voltage supplied from the...
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6864660 |
Method and device for controlling an electric load connected to a multiphase switchable DC/AC frequency convertor
A method and a device for realizing an effective value of a quantity to be varied in an electrical load connected to a multi-phase switchable DC/AC frequency convertor comprising a plurality of...
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6828749 |
Full-closed control apparatus
A full-closed control apparatus for performing velocity control based on a velocity signal of a motor and performing position control based on a position signal of a load driven by the motor,...
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6819078 |
Space vector PWM modulator for permanent magnet motor drive
A space vector pulse-width modulator (SVPWM) and a method implemented by the modulator. A precalculation module accepts Ua and Ub modulation indexes and in response thereto, outputs modified Ua and...
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6819077 |
Method and apparatus for reducing sampling related errors in a modulating waveform generator used with a PWM controller
A method and apparatus for use with a controller that samples a command frequency and provides modulating waveforms to a PWM inverter as a function of the sampled command frequency, the inverter...
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6794838 |
Method and system for regulating the power demanded by a rail motor
A method of regulating the power demanded by a rail motor including a current collector system cooperating with a catenary supplied with direct current power by power supply substations distributed...
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6768284 |
Method and compensation modulator for dynamically controlling induction machine regenerating energy flow and direct current bus voltage for an adjustable frequency drive system
A method for dynamically controlling regenerating energy flow and direct current bus voltage for an adjustable frequency drive system includes sensing a direct current voltage of a direct current...
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6731095 |
Controller for multiplex winding motor
A controller for a multiplex winding motor. When a multiplex winding motor is driven and controlled by inverters and each winding includes a current control system, the controller compensates...
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6710568 |
Motor drive device
A motor drive device of the invention has means for producing a pulse signal having a fixed amplitude by comparing a drive signal that is a sinusoidal signal synchronous with the rotation of a...
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6708134 |
Method to estimate motor speed for stabilized motor control
A method to estimate motor speed for extended stabilized rotational control of an induction motor at all speeds including slow speeds. The speed estimator supplies real-time time motor control...
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6707385 |
DC motor rotation speed alarm circuitry
DC motor rotation speed alarm circuitry includes an input node, a connection node, a ground node, a comparison circuit and a signal generator. When the rotation speed of the DC motor changes during...
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6707270 |
System and method for induction motor control
System and method for enhancing the torque output of a field oriented induction motor including a controller having a plurality of predetermined control parameters operable for processing input...
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6690132 |
Assembly for adjusting mobile elements of furniture
The invention relates to an assembly for adjusting mobile elements of furniture, comprising a motor, a control circuit which is provided with push-button switches, a current supply circuit, a mains...
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