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JP4736875B2 |
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JP4727098B2 |
In the image forming apparatus and method of the present invention, the reference clock is rendered common and a reference multiplication/division circuit is provided before a motor control part, if two motors which output different numb...
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JP4729002B2 |
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JP4722394B2 |
At the time of controlling a servo mechanism, a servo control detects that the position of a driven body is in the steady judgment region of a target position and varies a control constant (PI value) in the steady judgment region, so it ...
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JP4719351B2 |
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JP4717038B2 |
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 two phase space vector modulation. The n...
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JP4703846B2 |
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JP2011111035A |
To prevent a bad influence due to a counter electromotive force from a motor in a motor driving circuit used when the motor is driven.The motor driving circuit 21a is formed such that the counter electromotive force is thrown away to the...
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JP2011111079A |
To provide an electric power steering device that can apply an assist power appropriately according to a steering state by having a simple configuration without a software control.An ECU 11 includes a drive circuit 18 configured by conne...
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JP2011105155A |
To provide a technology by which the erroneous determination of a short circuit can be prevented at a normal time when motor wiring is not short-circuited in a motor control device utilized for a seat belt retraction device.In a seat bel...
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JP4691820B2 |
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JP4687396B2 |
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JP4687809B2 |
A motor control device includes a measurement unit, a speed control unit, a correction unit, a drive unit, and a disturbance suppressing unit. During a time period before a measurement value of speed of one of a motor and a driven object...
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JP2011101489A |
To provide a rotation angle detector integrated with a motor and for detecting a rotational angle without fail.A first capacitor 41 is connected parallel to a first pole winding 21 of a rotor 20, provided to a stator for relative rotatio...
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JP4685430B2 |
In a fan motor drive circuit which drives a motor based on a pulse-modulated external control signal, a temperature control signal generator generates a pulse-modulated temperature control signal whose duty ratio changes depending on tem...
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JP4683252B2 |
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JP4685371B2 |
A small, lightweight relative drive device is provided, which is capable of producing large torque. The relative drive device of a two-phase magnetic excitation type according to an aspect of the invention comprises first and second coil...
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JP4680492B2 |
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JP2011088268A |
To provide a motor driving device capable of estimating the temperature by calculating a heat generation amount of the inside of a radiator or a motor driving device and performing a rotation number control of a fan motor on the basis of...
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JP2011087402A |
To provide a motor controller for controlling a motor precisely by estimating an angular velocity accurately regardless of a temperature change or the like of a motor with a brush.An angular velocity estimation value ωe is used for moto...
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JP4676647B2 |
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JP4675575B2 |
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JP4677280B2 |
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JP4671850B2 |
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JP2011078228A |
To provide an overcurrent protection circuit which precisely prevents overheating of a switching element against an overvoltage of a power supply voltage while driving of a load is properly kept with a simple circuit structure.The overcu...
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JP4671334B2 |
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JP4663904B2 |
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JP4667234B2 |
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JP4659298B2 |
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JP4662119B2 |
The invention relates to a control method for a rotating electric machine, wherein a field coil current and a stator current are controlled by a controller. The stator current is controlled under vector control and is controlled so that ...
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JP4662309B2 |
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JP4660988B2 |
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JP2011057012A |
To provide an electric power steering control device whose manufacturing cost can be suppressed and which can be miniaturized, and to provide the electric power steering control device which can surely detect at least either one of an ON...
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JP4655400B2 |
A pulse generating circuit for motor rotation of a direct current motor which is capable of pulse generation following the variation of the motor rotation condition and of stable ripple pulse generation. The pulse generating circuit for ...
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JP4658587B2 |
In a motor driving apparatus, a control unit detects a rotation frequency of a motor to be driven and generates a control voltage Vcnt in a manner such that the rotation frequency thereof is brought close to a desired rotation frequency....
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JP4658376B2 |
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JP4652425B2 |
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JP4651157B2 |
To provide a method for controlling a magnetic levitation pump which can suppress variation of a rotational speed when a constant rotational speed mode is switched to a constant motor current mode. When a switching circuit SW is switched...
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JP2011050190A |
To provide a motor system capable of reducing the number of power supply lines.A motor system 10 is provided between a power source Ba for supplying power to a motor M and the motor M. and includes a first transistor 22 for driving the m...
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JP2011044006A |
To graspe a present position Xdet without using a high-performance counter or an AISC (Application Specific Integrated Circuit) in place of the counter.This moving body controller includes: the two-phase counter 906 detecting each of two...
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JP4641293B2 |
To precisely detect a temperature of a power assist motor and a controller without using a temperature sensor, and to improve a function of overheat protection. A first estimation temperature calculator 13 estimates the temperature of th...
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JP4643793B2 |
The arrangement has a starter motor (11) and a pinion (16) driven by an armature shaft (12) that can engage a toothed rim (3 of an internal combustion engine, a pre-engagement mechanism (23) for the pinion, a control and/or regulation ar...
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JP4640785B2 |
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JP4640563B2 |
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JP4641677B2 |
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JP4642713B2 |
A motor control device is used to control a motor to rotate. The motor control device includes a phase-wave signal sampling module, a first waveform modulating module, a second waveform modulating module and a control signal integrating ...
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JP2011040942A |
To provide a technology of driving a switching element for driving a load in an appropriate temperature range.In a normal control condition, an MCS (Motor Control System)20 makes an operation condition of a motor 60 transit to PWM (Pulse...
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JP4639038B2 |
To provide a motor control system for power assist capable of responding to sensor output at a high speed. This system consists of a plurality phases of stators 10, 12, a moving element 14, exciting means 16, 18 which alternately excite ...
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JP4636396B2 |
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JP2011031756A |
To provide a motor unit for electric power-steering, which secures heat radiating functions to an extent not to induce malfunction and achieves miniaturization of a control device.A motor side bracket 130 is made a bottomed cylindrical b...
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