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7612518 |
Inverter apparatus and method of reducing speed of alternating current motor
There is provided an inverter capable of reducing a speed in a short period of time without generating an overcurrent even in a case of an alternating current motor which is easy to be saturated...
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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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7609022 |
Power supply system for vehicle with improved energy efficiency and vehicle including the same
A matrix converter ( 38 ) converts three-phase AC power input from a first motor-generator (MG 1 ) directly to three-phase AC power for driving a second motor-generator (MG 2 ) and outputs the...
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7586286 |
Method and apparatus for motor control
A system and method for controlling a permanent magnet motor are disclosed. Briefly described, one embodiment receives a torque command and a flux command; receives information corresponding to a...
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7579805 |
Semiconductor device
A semiconductor device in which the lifetime of mounted components can be prolonged. A cooling system for controlling the temperature of a refrigerant through a heating section and a radiator is...
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7579795 |
Brushless-motor driving control device, image reading apparatus, and image forming apparatus
A drive control device for a brushless motor having a rotor and a plurality of coils with different phases can be included in an image reading apparatus or an image forming apparatus. The drive...
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7579792 |
Hybrid motor boost system and methods
An electrical system for a vehicle includes a power source providing electrical power to a first and a second electrical motor. Each motor has two or more windings, and each winding has a first end...
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7567055 |
Controller for brushless motor
A controller for a brushless motor determines difference between target currents and detected currents in a dq coordinate system and determines a target voltage applied to an armature winding based...
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7557527 |
Electrical power converter and control method
An electrical power converter comprises a first direct current line connected to a first direct current source, a second direct current line connected to a second direct current source, an...
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7541769 |
Electric power converter and motor driving system
An electric power converter which has improved accuracy in compensation of a dead time. A motor driving system employing the electric power converter is also provided. A power module includes a...
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7521888 |
Electric motor controller for a domestic appliance
The invention relates to a three-phase asynchronous electric motor for domestic appliances, comprising power elements, such as triacs or relays, for charge control. The power elements other than...
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7511450 |
Frequency converter, motor, motor drive system and maintenance method for motor drive system
A frequency converter for outputting a power to drive a motor, having: an inverter unit for inverting a d.c. power to an a.c. power; a control unit for controlling the inverter unit; and a housing...
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7495411 |
Controller for an electric four-wheel-drive vehicle
An object of the present invention is to provide a controller for an electric four-wheel-drive vehicle, which is capable of minimizing torque changes and consuming excessive power even when the...
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7495410 |
Systems and methods for improved motor drive power factor control
Systems and methods are described for controlling power factor in motor drives having a switching rectifier providing a DC link current to an inverter in which the rectifier gain is increased to...
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7486491 |
Ground detector and DC-AC inverter for vehicles
A ground detector includes a pair of lines, a first series circuit, a reference portion, a second series circuit, and a detection point. The first series circuit connects the lines to each other....
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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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7456602 |
System and method of commonly controlling power converters
A system and method for controlling power converters are disclosed. Briefly described, one embodiment is a method comprising communicating at least one first control signal to an alternating...
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7456600 |
Pulse code width modulation motor drive system
A detailed architectural and operational characteristic of a pulse code width modulation (PCWM) motor drive system is presented. The system can drive a three phase permanent magnet AC (PMAC) motor...
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7443129 |
Quenching device for a converter bridge with line regeneration
There is described a method for controlling a quenching device for a converter bridge with line regeneration, whereby the converter bridge controlled by a network-timed control circuit by ignition...
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7443127 |
Apparatus and method for motor control using table
In an apparatus of controlling a motor in a battery vehicle, a current command generation section has a table, and generates an exciting command current and a torque command current by referring to...
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7436147 |
Motor driving apparatus
A motor driving apparatus drives a motor by means of an AC/AC direct converter such as a matrix converter. The motor driving apparatus is provided with a current detecting section for detecting...
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7429836 |
Motor driver circuit, control method thereof, and electronic apparatus
A motor driver circuit includes a diving circuit for driving at least one motor, a plurality of DC/DC converters for respectively generating different voltages, a detection circuit to detect an...
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7427849 |
Controller for an electric vehicle and driving apparatus for the electric vehicle
The present invention provides a controller and driving apparatus for an electric vehicle, which enables a motor to steadily output torque even when there is an increase in the rotation speed of an...
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7423406 |
Power control of an induction machine
Regulation of the active and reactive power of an induction machine in a coordinate system fixed on the winding, wherein a first regulator output variable is generated using a first regulator as a...
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7423401 |
AC rotary machine constant measuring apparatus for measuring constants of stationary AC rotary machine
In an apparatus measuring constants of an induction motor, an inverter converts an inputted voltage command signal into a single-phase AC power and feeds the single-phase AC power to the induction...
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7420351 |
Power-factor correction device for variable speed drive
A variable speed drive for a three-phase electric motor, including a rectifier module supplying a rectified voltage from a single-phase alternating current network, a voltage step-up module...
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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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7397215 |
Modulation method for bridge circuits for the particular control of direct current motors
The invention relates to methods and systems for modulating the supply voltage of an electric load, particularly an electric motor, fed by a bridge circuit, wherein the load is switched as a...
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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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7348757 |
Circuit to improve motor phase current reconstruction via DC link
Apparatus for reconstructing the phase currents of a multiphase load driven by a multiphase inverter fed by a DC link and controlled by a PWM controller, the apparatus including a sensor in the DC...
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7348755 |
Time sliced DSP operation for very high frequency pulse width modulated controllers
Methods and apparatus are provided for frequency scaling the PWM signal output of a controller/driver for an electrical device such as a BLDC motor. The apparatus comprises a number of multiple...
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7348689 |
Switching circuit and a method of operation thereof
This invention relates to the operation of a switching circuit, such as a bridge circuit. The invention provides a method of generating pulsed first and second switching signals for switching first...
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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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7339345 |
Power converter topologies for better traction drive packaging
At least three alternative stiff current supply power converter topologies provide fixed current to a respective electric load such as a motor, or a non-inductive electric load using either a...
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7336052 |
Device for powering a variable speed drive
Variable speed drive comprising a main rectifier module ( 10 ) including thyristors (K 1 , K 2 , K 3 ) to power a main continuous bus ( 15 ) from an external power network ( 5 ), an inverter module...
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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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7317295 |
Electric motor driving system, electric four-wheel drive vehicle, and hybrid vehicle
An electric four-wheel drive vehicle includes: an internal combustion engine; a generator for outputting DC electrical power; an inverter for converting DC electrical power, output from the...
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7310475 |
Motor driving apparatus
A motor driving apparatus is provided which can minimize ripple current flowing through a DC link capacitor, and downsize the motor driving apparatus. It synchronizes the frequency of the inverter...
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7301737 |
Motor power line break detection method in AC servo driver
An object of the invention is to provide a break detection method capable of lessening a delay of motor power line break detection. According to the invention, in a motor power line break...
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7301301 |
Electric car control apparatus
In an electric car control apparatus for driving an induction motor, detection accuracy of a DC voltage is improved. A DC power supply device is provided which has a maximum potential terminal A,...
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7298105 |
Motor speed estimation system and method using hybrid model reference adaptive system
Motor drives, motor speed controllers, motor speed estimation systems, and methods are presented for controlling motor speed and for estimating motor speed, in which a speed estimate controller...
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7294989 |
Frequency converter overvoltage protection
A method of protecting a frequency converter against overvoltage by controlling an AC motor during braking or during light load and a frequency converter, wherein the frequency converter is a...
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7282877 |
DC brush motor rotation amount detection method and apparatus
The present invention provides a DC brush motor rotation amount detection method comprising the steps of: counting pulses generated by switching of brushes when a DC brush motor rotates; removing...
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7279865 |
Method and apparatus for monitoring motor status using induced motor voltage
A motor drive unit includes a controller, a voltage inverter, and a speed estimator. The controller is operable to generate at least one command signal for controlling a motor associated with the...
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7279861 |
Servo control apparatus
In a servo control apparatus constituted by a converter unit 3 for rectifying an AC power supply voltage to produce a DC power supply voltage, and a plurality of inverter units 5 for producing...
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7279855 |
Electric drive device for vehicle and hybrid engine/motor-type four wheel drive device
A vehicle electric drive system and a hybrid engine-motor type vehicle drive system realizing simplification and miniaturization of electric parts and, moreover, reduction in cost while maintaining...
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7268515 |
Three-in-one AC servo drive
A three-in-one AC servo drive includes a main console, a control module, a power module and a plurality of servo motors. A single drive can be connected to a plurality of motors. The power module...
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7253574 |
Effective switching frequency multiplier inverter
A switching frequency multiplier inverter for low inductance machines that uses parallel connection of switches and each switch is independently controlled according to a pulse width modulation...
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7250794 |
Voltage source converter
A voltage source converter with a line-side diode rectifier, a load-side inverter with an electronic circuit, a power supply for the electronic circuit, and a slim DC link with a DC link capacitor...
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