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8183733 |
Two-phase brushless DC motor
A brushless motor includes a two-phase winding stator having 4×n winding poles and auxiliary poles provided between the winding poles, and a rotor constituted by 6×n permanent magnet rotating p...
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8179069 |
Electric power tool, control unit and recording medium
An electric power tool includes a direct current motor, at least one switching device, a trigger switch, a control unit, and a drive unit. The control unit sets a driving duty ratio for PWM...
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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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8174221 |
Motor control apparatus and control apparatus for hybrid electric vehicles
To provide a motor control apparatus that uses an inverter to drive an AC motor and hybrid automotive control apparatus adapted to drive an AC motor by use of an inverter while reducing torque...
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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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8159163 |
Phase current estimation device of motor and magnetic pole position estimation device of motor
A phase current estimation device of a motor includes: an inverter which uses a pulse width modulation signal to sequentially commutate an electric flow to a motor of a three-phase alternating...
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8159171 |
Controller and method for adaptively adjusting motor driving current waveforms
The present invention discloses a controller and a method for adaptively adjusting motor driving current waveforms. According to the present invention, the controller receives multiple different...
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8143835 |
Method of driving DC/DC converter, method of controlling DC/DC converter apparatus, method of controlling driving operation of vehicle, and method of driving fuel cell system
Under the same target voltage, a basic duty ratio depending on a target ON time is set, and prior and subsequent duty ratios before and after upper arm switching devices or lower arm switching...
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8144420 |
VCM PWM control architecture for power saving in hard disk drives
The power required by a voice coil motor (VCM) to maintain the head in the data region of a disk drive during an idle mode is further reduced. The current supplied to the VCM is switched on and...
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8143964 |
Method for generating a PWM signal
The PWM control circuit is provided. The PWM control circuit includes: a PWM control signal generator that generates a PWM period signal defining a period of a PWM signal and a PWM resolution...
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8143831 |
Regulating device for regulating the voltage on a high-side load
The invention to an electronic control system, controlled by a pulse width-modulated signal (SG) related to earth, for regulating the voltage (Umot) across a high-side load (M), in particular a fan...
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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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8132691 |
Vending machine dispensing system
A dispensing system for a vending machine includes a vend motor, a cradle, a load bar and a push arm. Upon selection of a particular product, the vend motor rotates the cradle, causing the product...
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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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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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8120307 |
System and method for providing constant loading in AC power applications
A system and method are provided for constant loading in AC power applications where at least one turn-on point of at least one half cycle of a modulating sine wave is randomly selected; at least...
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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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8096377 |
Generator driving device, hybrid vehicle, and control method for generator driving device
In order to securely prevent, even where a boosting unit is provided, a rush current from arising when a contactor is turned on during a transient state, the voltage of a surge absorbing condenser...
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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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8089236 |
System and method for adjusting pulse width modulation signals according to component temperatures in a computer
A computer-based method for adjusting pulse width modulation (PWM) signals according to temperatures of one or more computer components includes setting a frequency formula for a fan in a computer....
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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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8084967 |
Motor controller and printer
A motor controller is provided. The motor controller includes a motor drive unit that drives a plurality of motors; a thermal shutdown unit that is provided in the motor drive unit and that stops...
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8080953 |
Motor control method and device
A control device includes a drive control unit that performs control for driving the electromagnetic coil, and a regeneration control unit that performs control for regenerating power from the...
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8076899 |
Valve timing control apparatus
An electric power supply driver executes duty control of turning on and off of a selected switching element to supply electric power to a corresponding stator coil in a case where an actual...
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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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8072171 |
Motor control
A method of controlling a current of a three-phase electric motor with a three-phase controller. The firing angles are adjusted so as to leave a range of firing angles in which DC components appear.
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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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8055124 |
System for controlling rotary speed of computer fan
A system can control a rotary speed of a computer fan according to the type of the computer fan. If the computer fan is determined to be a 3-pin fan, the system can output a changeable voltage to...
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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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8036518 |
Motor and motor speed controlling system
A motor and a motor speed control system are disclosed. Two power signal lines and one feedback/speed-control signal line are coupled between a control device and the motor. The two power signal...
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8030863 |
Motor drive device and vehicle provided with the same
A control device converts a torque instruction value of an AC motor into a current instruction of AC motor, and employs current control in which feedback is performed by PI control to match an...
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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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8030874 |
Power converting apparatus
To reduce, in a power converting apparatus for an electric locomotive, a sixth-order harmonic noise induced by a torque ripple component equivalent to a sixth-order frequency of an inverter...
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8026682 |
Circuit arrangement
The invention specifies a circuit arrangement (1, 20) for controlling a brushless electric motor (37) with a control chip (2), particularly a microcontroller, which has a number of PWM contacts...
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8026678 |
Motor control device
A motor control device includes at least one operating unit that is provided corresponding to at least one motor to operate the at least one motor, and a control unit that, each time at least one...
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8023234 |
Method for detecting earth-fault conditions in a motor controller
The present invention relates to a method for determining the existence of an earth-fault on-the-fly and thereby protecting a motor controller having a high- and a low-side DC-link, and having...
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8022651 |
Electric power steering device
Provided are an electric power steering device which is capable of determining a failure without using a motor current, and an electric power steering device which removes any motor current...
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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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8013554 |
Shutdown path performance test for permanent magnet AC motor in hybrid powertrain
A diagnostic system for a hybrid vehicle comprises a motor control module and a fault diagnostic module. The motor control module controls torque output of an electric motor having a predetermined...
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8013549 |
Counter electro-motoric force based functional status detection of an electro-motor
The present invention relates to a circuit for detecting a functional status of an electro-motor. Typical electro-motors need additional components to identify the functional status of the motor....
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8013552 |
Systems and methods for controlling a DC motor
Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC...
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7969108 |
Control circuit for a brushless DC motor and method therefor
A control circuit (120, 140) for a brushless direct current (DC) motor (160) includes a current drive circuit (140), a current loop regulator (122), and a commutation loop regulator (124, 126). 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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