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JP4557387B2 |
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JP2010220294A |
To provide a motor controller which avoids the occurrence of such a fault that a voltage is kept applied to the terminal of a motor in case that a fault occurs at a motor voltage detecting part and that welding occurs at a relay contact ...
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JP4552543B2 |
To estimate the temperature state of a motor accurately based on the driving amount thereof. The overheat judging device of a motor comprises a section for acquiring information about the driving amount of a judgment object motor and inf...
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JP2010207007A |
To provide a motor controller capable of suppressing an excess current resulting from a back electromotive force.The motor controller includes a decision means S101 deciding the positive or negative decision value subtracting a back elec...
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JP4543939B2 |
A correction value calculating method includes: preparing a printer including a motor, a PID control system for controlling the motor, and a memory for storing a correction value, the printer being configured to calculate a value of a cu...
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JP2010200409A |
To provide an actuator controller which can detect an abnormality in a motor and also reduces the possibility that a drive circuit for the motor may break by an overcurrent.An actuator controller has a first switch circuit part, which co...
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JP4541022B2 |
The method involves applying voltage to the phase winding of a stator independent of the period of the movement of the rotor, and detecting peak of current waveform to determine the position of the rotor. Independent claims are also incl...
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JP4541723B2 |
A motor driving apparatus includes a power circuit that controls an output voltage via a feedback resistance (1-16, 1-17, 1-18). The power circuit varies the output voltage by changing a value of the feedback resistance (1-16, 1-17, 1-18...
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JP2010193703A |
To detect a counter electromotive voltage favorably.A motor drive circuit 100 includes an H bridge circuit 10, a potential difference detecting circuit 20, a calibration circuit 30, a counter electromotive detection circuit 40, a control...
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JP4535659B2 |
An electrical circuit arrangement for controlling a unit, such as an adjustment system for windows or a sliding sunroof, that is driven by a motor and is situated in a motor vehicle. The arrangement guarantees that, in the case of a shor...
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JP4530521B2 |
A problem to be solved by the present invention is that, in a conventional system for controlling electric power steering, as the number of revolutions of a motor is increased, an assist force decreases, resulting in faulty steering resp...
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JP4532663B2 |
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JP4529871B2 |
The device has an electronic control unit (7) for controlling an electrical motor (6) according to an operating state of an internal combustion engine (1), such that an actual physical magnitude is controlled. The unit stops the energy s...
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JP4532188B2 |
In a holding arrangement ( 101 ) for a medical-optical instrument ( 103 ), an electric motor is provided in a rotational joint ( 111, 119 ) to compensate a load torque occurring in this rotational joint. This electric motor is supplied w...
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JP4529666B2 |
A device for driving a load such as an electric motor for driving a fan mounted on an automobile includes a semiconductor power FET for supplying a load current to the load, a voltage detector for detecting a load voltage, a current dete...
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JP2010183793A |
To detect the angle of rotation of a rotor without using a large-scale sensor and without using a resistor not required for rotating a DC motor.The DC motor 1 can detect the angle of rotation of the rotor 4. The DC motor 1 includes: a DC...
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JP2010178467A |
To prevent carbon powder from being accumulated in a contact part between a brush and a rotor in a DC motor with brush.In the motor drive giving a driving signal to drive a DC motor with brush, a signal S, which causes the DC motor with ...
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JP2010178437A |
To provide a driver circuit in which the length of a dead time can be measured accurately.In the driver circuit 100, two output transistors MH1 and ML1 are provided in series between the first power voltage Vdd and a grounding potential....
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JP4523633B2 |
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JP4521779B2 |
A circuit for a series motor for a power tool is disclosed, wherein reliable switching is achieved by means of two electronic switches, without the use of a mechanically disconnecting switch. To this end, two electronic switches, prefera...
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JP4516656B2 |
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JP4516698B2 |
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JP4519471B2 |
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JP4506784B2 |
To surely detect a failure of a current detection circuit of an electric power steering device, and to switch a control system from a feedback system to an open-loop system when the failure is detected. A control device for an electric p...
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JP4508542B2 |
In a direct-current motor drive bridge circuit structured such that a pair of forward rotation switching elements and a pair of reverse rotation switching elements are alternately connected annularly, a direct-current motor is interposed...
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JP4507704B2 |
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JP4502152B2 |
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JP4502153B2 |
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JP2010154640A |
To automatically remove a foreign matter held between relay contacts associated with motor feeding of a motor driven power steering device while suppressing the further degradation of the relay contacts as much as possible. The cumulativ...
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JP4496573B2 |
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JP4497010B2 |
To provide a vehicle motor control device that achieves smooth and accurate steering control in a small steering range. A duty operator 24 sets a duty command value Du of an upper arm element to a value of prescribed times a duty command...
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JP4497703B2 |
A recording apparatus of the present invention includes a conveying means for conveying a recording medium, a conveying motor for driving the conveying means, a servo computing means for controlling the output directed to the conveying m...
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JP4490671B2 |
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JP4492732B2 |
The motor driving device includes a first function of supplying power to a motor so that the motor generates a driving force to drive a driven member, a second function of detecting a current flowing through the motor, a third function o...
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JP4495150B2 |
The invention relates to a series resistor assembly (1) for an electric motor (M), in particular for an electrically driven ventilating fan in a vehicle. Said assembly comprises a series resistor (2) for controlling the RPM of the electr...
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JP4492102B2 |
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JP4492215B2 |
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JP4491719B2 |
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JP4492033B2 |
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JP4493132B2 |
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JP4494990B2 |
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JP4494545B2 |
To obtain a driver of motor compressor for a car air conditioner suitable for a hybrid automobile having a plurality of power sources in winch the battery capacity can be reduced. A driver 15 for driving the motor compressor 17 of a car ...
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JP4487168B2 |
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JP4485755B2 |
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JP4487447B2 |
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JP4485782B2 |
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JP2010136611A |
To provide a current motor control device and method that can check the rotation frequency and direction of a direct current motor without wearing a brush or commutator. The direct current motor control device and the method are disclose...
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JP4483060B2 |
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JP4480325B2 |
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JP4480922B2 |
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