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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...
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8179075 |
Motor driving integrated circuit
A motor driving integrated circuit comprising: a speed control circuit configured to control a rotation speed of a motor according to a speed control signal; a detecting circuit configured to...
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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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8169177 |
Electric vehicle
An electric vehicle includes a control unit having overcurrent generation judgment unit, inverter selection unit, and inverter drive control unit. The overcurrent generation judgment unit judges...
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8159172 |
Method for controlling an electric motor by using the PWM technique
A method for controlling an electric motor by using the PWM technique including the steps of: applying to the clamps of the electric motor an electric voltage varying in time, which displays 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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8148927 |
Alternating-current motor control apparatus
A control apparatus for an alternating-current motor that is driven by an inverter includes a rectangular wave voltage control portion that generates a control command of the inverter such that...
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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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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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8138694 |
Bidirectional buck-boost power converters
A bidirectional buck-boost power converter 13 including a pair of inverter modules 14, 15 disposed at an output of a machine, and an inductor Lo connected between the pair of inverter modules 14,...
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8134327 |
Phase current measurements in a three phase inverter using a single common DC-link current sensor
A method for measuring current in each phase of a three-phase inverter driven motor is based on the three-phase inverter being controlled in a PWM mode by three PWM signals including the use of a...
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8134329 |
Buck converter with improved filter design
A buck converter for use in controlling a motor in accordance with an embodiment of the present invention includes a power input operable for connection to a DC power supply, a switch for...
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8134326 |
Motor drive apparatus and method for electric power steering system
In a motor drive apparatus for an EPS motor, which provides steering assist torque in an electric power steering system, a three-phase inverter applies three phase-voltages to the EPS motor, and a...
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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...
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8120306 |
Voltage source inverter with a voltage offset
Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage...
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8111030 |
Motor control apparatus and motor control method
A motor control apparatus and a motor control method determine whether the motor is in a back-pressure area so as to provide different rotation-speed control signals. When the fan is in the low...
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8106617 |
Motor power-management protection method and circuit
A power management protection circuit and method provides for a fast, real-time hardware logic control of the power control components of a motor, whereby the over-current condition is an integral...
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8106621 |
Control device for induction motor
A control device includes a slip calculator that calculates a first slip frequency of an induction motor, a current detector that detects motor current that passes through the induction motor, an...
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8102135 |
Motor and drive control system thereof
Provided is a motor having a magnetic polar unit in which a permanent magnetic polar array having arranged therein alternately a plurality of permanent magnetic polar elements in alternate opposite...
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8100799 |
Method and system for controlling power inverters in electric drives of vehicles with two-mode transmissions
Methods and systems for driving an automobile are provided. The system includes a prime mover power source and a two-mode, compound-split, electro-mechanical transmission, including first and...
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8093854 |
Fan speed control system
A system for controlling the fan speed is described. Specifically, one embodiment of the present invention set forth a computing system, which includes a first processing unit including a first...
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8084973 |
Motor driving circuit
A motor driving circuit generates pulse driving signals, and controls the ON/OFF state of a switching circuit connected to a coil of a motor which is to be driven, thereby controlling the...
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8084986 |
Dead-time compensation apparatus of PWM inverter and method thereof
A dead-time compensation method is applied to a PWM inverter, which is provided to drive an induction motor using a constant V/f control. The method first calculates a root-mean-square current of...
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8084976 |
Motor control device and compressor
A motor control device performing vector control for a motor that drives a load whose load torque varies periodically. The motor control device has: a motor speed deriving portion estimating or...
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8076890 |
AC motor driving apparatus and control method
Provided is an AC motor driving apparatus and an AC motor control method capable of utilizing the conventional PWM system as-is even in an ultra-compact AC motor having an extremely few turns of...
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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...
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8072180 |
Synchronous sampling of PWM waveforms
A device for filtering a carrier frequency of a PWM waveform. The device includes a low-pass filter for converting the PWM waveform into an analog signal. The device further includes a sampling...
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8063596 |
Apparatus for carrying out improved control of rotary machine
In an apparatus, a first drive unit drives, in a first range of a voltage utilization factor, a switching member to thereby control an output voltage of the power converter to be matched with a...
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8054033 |
Brushless, three phase motor drive
A control method for a sensor-less, brushless, three-phase DC motor. A pulse-width modulation (PWM) duty cycle may be calculated. A voltage induced by rotation of a rotor may be sampled at a first...
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8049456 |
Dynamoelectric machine assemblies operable with serial communication signals and PWM control signals
A dynamoelectric machine assembly for connection to a system controller. The assembly includes at least one input contact for receiving a control signal from the system controller and a processor...
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8044631 |
Power conversion systems and methods for controlling harmonic distortion
Control systems, methods and power conversion systems are presented for controlling harmonic distortion, in which multi-sampling space vector modulation (SVM) is employed for controlling power...
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8044618 |
Control apparatus for AC motor
It is attained by being provided with a motor constant calculation unit for calculating electric constants of a motor, and by correcting setting values of electric constants defined on one of the...
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8044632 |
Power conversion device
A power conversion device includes a converter that converts AC power to DC power, a converter controller that controls an output voltage of the converter, an inverter that converts the DC power to...
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8032261 |
Cooling system with adaptive protocol cooling unit
A cooling system includes a fan unit having a terminal receiving a signal representative of a commanded fan speed and a terminal for receiving a signal representative of actual fan speed. A system...
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8030861 |
Method for controlling a deceleration process of a DC motor and controller
The invention is directed to a method for controlling a deceleration process of a DC motor (20), wherein the DC motor (20) is driven by a bridge driver (18) coupled to a power supply (12) intended...
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8018184 |
PWM control circuit and PWM control method
The PWM control circuit includes a polarity determination unit, a full wave rectification unit, an adjustment unit that generates an adjusted waveform signal by adjusting waveform of the full wave...
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8013565 |
Motor control device, control method, and control program
The temperature of a stator coil is measured by a temperature sensor (14), amplified by a stator coil temperature amplifier (21), and transmitted to a vehicle control section (23). Further, motor...
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8008886 |
Power converter
A power converter is provided with a rectifying circuit, an inverter circuit, and a common mode filter including a common mode choke coil and a capacitor. The switching frequency of a PWM...
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7999503 |
Control module for dynamic operation of a power inverter using an application specific integrated circuit
Systems and apparatus are provided for a control module for operating an inverter in a vehicle. A control module comprises a first circuit card assembly and a microprocessor mounted on the first...
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7999500 |
Calibrating spindle motor controllers
Methods, systems, and apparatus, including computer program products, are described for calibrating spindle motor controllers. In one aspect, a method is provided that includes receiving a...
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7990085 |
Generator control unit
An object of the present invention is to provide a generator control unit having improved voltage response in a system which is not provided with a battery in a DC output unit. In order to control...
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7983060 |
Method for reducing the reactive power requirement of a fundamental frequency clocked power supply side converter under no load and with low motor loading
The invention relates to a method for reducing the idle current requirement of a base frequency clocked supply side converter (1) on idle and with low motor loads, provided with controllable...
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7969039 |
Method of controlling fuel cell vehicle and method of controlling DC/DC converter apparatus
A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the...
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7960930 |
Control apparatus and method for motor drive system
In the rectangular-wave voltage control mode, torque feedback control, in which the voltage phase of the rectangular-wave voltage is adjusted based on the deviation of the torque estimated value...
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7956558 |
Automatic traction control for two separately excited motors utilizing a single electronic control
An automatic traction control system is provided for an electric or hybrid-electric vehicle. The automatic traction control system may be used with vehicles using two separately excited motors...
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7952310 |
Controller of multi-phase electric motor
A controller of a multi-phase electric motor includes a drive section for driving the multi-phase electric motor, a single current detection section for detecting a current value of the multi-phase...
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7948206 |
Assembly comprising a three-phase machine and a frequency converter
Disclosed is an assembly encompassing a three-phase machine and a frequency converter. Said assembly has the following characteristics: the three-phase machine comprises a stator and a rotor; at...
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7936142 |
Portable drilling device
A drilling device prevents recurrence of an overload condition after occurrence of the overload condition, thereby improving operability and safety in the drilling device. A motor for rotating a...
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7928686 |
Electric motor control device, electric vehicle, and hybrid electric vehicle
An electric motor control device includes a direct current power source; an inverter interposed between an electric motor and the direct current power source, the inverter device controlling an...
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