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8179065 |
Position sensorless control of permanent magnet motor
Systems and methods of controlling a permanent magnet motor without a mechanical position sensor are provided. In accordance with one embodiment, a motor control system includes an inverter...
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8164290 |
Fan and motor control device
A fan includes a motor control device which is electrically connected with a motor and an alternating current power source. The motor control device includes a converting circuit, a power factor...
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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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8154231 |
Motor controller and vehicular steering system using said motor controller
A low speed region position estimating portion is designed to be suitable for when the motor is operating in a low speed region, and estimates a low speed estimated rotational position θ^L. A high ...
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8143826 |
Drive control circuit for electric motor
A drive control circuit includes: an original drive signal generator generating an original drive signal based on a positional signal indicating a relative position of a first member and a second...
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8138698 |
Motor rotation irregularity detection circuit
A motor rotation irregularity detection circuit includes a first integrator for integrating a rotation detection signal that is output from a driver of a sensor-less motor; a differentiator for...
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8134328 |
Active pilot inceptor with self warm-up
An active pilot inceptor system includes a pilot inceptor, a multi-phase motor, and a motor control. The pilot inceptor is configured to receive user input and is operable, in response to the user...
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8115435 |
Device for controlling a polyphase synchronous rotary electrical machine and polyphase synchronous rotary electrical machine containing such a device
A control device (2′″) for an AC-DC current converter associated with a polyphase synchronous rotary electrical machine. The AC-DC current converter contains, for each phase, a branch of two pow...
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8106612 |
Brushless motor control device and brushless motor control method
A brushless motor control device according to the present invention drives a brushless motor including a stator having coils of three phases U, V, and W and a neutral line, and a sub coil provided...
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8093846 |
Motor drive device
In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis...
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8084975 |
Brushless motor, brushless motor control system, and brushless motor control method
A brushless motor control system according to the present invention detects a rotor stop position when activating the brushless motor including a stator having coils of three phases U, V, and W,...
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8076880 |
Motor control device
A motor control device has a three-phase bridge circuit, a driving circuit, and a microcomputer. The three-phase bridge circuit has three pairs of MOSFETs for U, V, and W phases of a three-phase AC...
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8072167 |
Time delay logic of motor control
Circuitry for controlling a motor, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect...
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8072166 |
Brushless motor
The brushless motor has a first and second drive member. The first drive member is equipped with M phase coil groups each having N electromagnetic coils where M is an integer of 1 or greater and N...
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8058833 |
Fine resolution motor control
Methods and apparatus are provided for deriving precision position and rate information for motors using relatively low precision analog sensors, and for implementing compensation techniques that...
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8049447 |
Electric motor with power supply circuit supplying isolated electric power
Circuitry for controlling motors, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect...
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8050543 |
Trigger mechanism for current acquisition used for motor control applications
A trigger mechanism for starting current acquisition for motor control applications is disclosed. The present invention may generate an edge (ADC trigger) that can be used to start current...
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8040087 |
Control devices and methods
A control device for driving a motor which includes a rotor and a stator is provided. The control device includes a Hall detector and driving circuit. The Hall detector detects magnetic flux...
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8030864 |
Motor drive circuit
A motor drive circuit includes a first amplifier circuit to amplify a difference between first and second position detection signals with a gain becoming smaller according to drop in power supply...
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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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7999497 |
Device for controlling polyphase rotating machine
A device for controlling a polyphase rotating machine comprising a stator, a rotor, and sensors, the device being capable of receiving at least one first sensing signal (V, W, U) representing a...
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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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7990087 |
System and method for providing cooling fan characteristic feedback
A device comprising a fan controller, an encoder, a driver, a resistor/capacitor filter, and a baseboard management controller. The fan controller is configured to output a cooling fan status...
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7973501 |
Fan system and motor control device
A fan system includes a control device and a fan device. The control device has a first node, a rotation speed signal generation circuit and a rotation speed reading circuit. The fan device has a...
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7960934 |
Fault-tolerant control system
A fault-tolerant position feedback filter may be used in an actuation control system to limit the authority of a first position signal, should the first position signal become erroneous, and...
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7940019 |
Control module adapted to brush and brushless motors
A control module adapted to brush and brushless motors essentially applies a magnetic sensor to generate detecting signals in response to the status of the motor and deliver those signals to a...
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7940020 |
Brushless DC motor with reduced current ripple
A commutation circuit for driving a brushless DC motor is controlled according to a commutation cycle composed of alternating primary steps and transitional steps. The commutation circuit includes...
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7923952 |
Device for controlling polyphase rotating machine
A device for controlling a polyphase rotating machine, the machine comprising a stator, a rotor, and sensors, the device being capable of receiving: at least one first sensing signal (U; V; W)...
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7915843 |
Motor drive device, method, and cooling device using the same
In the motor drive apparatus, a Hall element outputs a first sinusoidal signal and a second sinusoidal signal, of mutually opposite phases, in accordance with rotor position. A hysteresis...
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7902775 |
Motor driving device
An object of the present invention is to provide a motor driving device capable of outputting an accurate rotation signal while preventing a false detection of B-EMF in a position detecting...
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7884563 |
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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7880425 |
Electric motor drive systems, motor vehicles, and methods of phase current regulation
In various embodiments, an electric motor drive system (400, FIG. 4) and a motor vehicle (1000, FIG. 10) include an inverter (404, FIG. 4) adapted to generate (604, FIG. 6), based on inverter...
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7880417 |
Motor controller and electric power steering apparatus
In a motor controller, in the case that occurrence of a failure of electric current flow is detected in any phase of a motor, a phase electric current command value changing in accordance with a...
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7859215 |
Motor controller, control system, and control method
A motor controller includes a reference signal generator; an A/D converter performing A/D conversion of the cosine and the sine signals outputted from a resolver; a first amplitude calculator...
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7834568 |
Method and device for driving a brushless motor with voltage waveform predisposed for a progressive and automatic switching from a three-phase sinusoidal driving to a square wave three-phase driving
The method and a related device are for driving a brushless motor, according to which by acting solely on the control value, that is by reducing or increasing it, the driving mode eventually passes...
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7813089 |
Motor controller and electric power steering apparatus
In a motor controller, if a failed electric current flow in any one of phases of a motor is detected, a motor control signal is generated, based on a phase other than the phase with the failed...
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7812556 |
Phase logic circuits for controlling motors
Circuitry for controlling motors, such as a brushless motor (BLM), is disclosed. The circuitry may comprise one or more inputs for receiving rotor position signals from one or more Hall effect...
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7808201 |
Sensorless field oriented controller for two-phase motor
A power converter circuit for providing maximum utilization of a DC bus voltage to a two-phase Permanent Magnet Synchronous Motor (PMSM) is disclosed. The circuit includes first, second, and third...
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7795827 |
Control system for controlling motors for heating, ventilation and air conditioning or pump
The present invention discloses a control system for controlling a motor for a heating, ventilation and air conditioning (HVAC) or a pump comprising: an opto-isolated speed command signal...
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7773351 |
Motor control microcomputer and control method for the same
An object of the present invention is to improve safety of a motor by instantaneously detecting the abnormality of a PWM signal. To achieve the object, provided is a motor control microcomputer for...
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7764030 |
Control device for three-phase brushless motor
A control apparatus for a three-phase brushless motor, in which a control circuit includes time interval calculation means (133 in FIG. 4). The time interval calculation means (133) is endowed with...
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7755317 |
Methods for electric vehicle motor control and rotor position detection fault-tolerant processing
This invention provides methods for electric vehicle motor control and rotor position detection and fault-tolerant processing. The rotor position signal sampled by the system is compared with the...
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7719216 |
Motor drive control device and motor drive control system
A motor drive control device for controlling the driving of a brushless motor includes position detecting units (e.g. sensors or Hall elements), a drive signal determining unit and a drive signal...
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7710058 |
Motor drive architecture for high frequency AC bus
A motor drive for an electric motor receives high frequency AC current, and delivers this current through a converter which is operable to change the current delivered downstream to an inverter and...
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7705550 |
Noise suppression for hall sensor arrangements
A method and apparatus is provided for processing signals from a Hall-effect device arrangement coupled to a monolithic brushless DC motor where the motor is driven by a PWM circuit providing PWM...
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7649329 |
Method and circuit for controlling motor and brushless motor system using the same
A method and a circuit for controlling a motor and a brushless motor using the same are provided. The brushless motor includes three phase coils, wherein the first terminals of all the phase coils...
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7580617 |
Electric fan device and method of driving electric fan device
An electric fan device includes a motor which drives an electric fan for a vehicle, a control switch which controls a motor current supplied to the motor, and a control unit which controls an...
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7576503 |
Brushless motor control apparatus for pump
A brushless motor controller for use in a fuel pump detects a rotor phase based on an induced voltage in each phase coil of a brushless motor, and controls energization of the each phase coil based...
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7504785 |
System for controlling an electrostatic stepper motor
A system to control the fixed mass/spring mechanical resonance of the motor in conjunction with a model of the motor that estimates the present position and allows the determination of the motor...
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7429841 |
Method and apparatus for movable element position detection in an electrically commutated machine
A method and circuit for detecting the position of the movable element of an electrically commutated machine. The method and apparatus allow detection of the back electromagnetic force (BEMF)...
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