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JP2008515382A |
Ultra-compact, at least about 20 watts / cubic centimeter (W / cm)3) Is characterized by a controller for a motor having a power density of). The controller utilizes common ground for the power circuit that energizes the windings of the ...
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JP2008109744A |
To provide a controller for a motor with brush which can alter the output range, by adjusting the position of the brush, according to the output demanded for the motor with brush.The controller for a motor with brush, including a brush d...
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JP2008109845A |
To improve a read image quality by driving a motor at an appropriate initial Duty.A motor controller includes: a control unit which applies an initial power for starting the moving of a conveyance target to start the rotation of the moto...
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JP4084117B2 |
A driving current flowing through a first output transistor is given to a stator coil of a three-phase motor (first operation), a driving current flowing through the stator coil is output to the ground through a second output transistor ...
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JP4084109B2 |
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JP4082174B2 |
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JP2008099474A |
To disperse the heat generated, without causing it to concentrate on specified components, and to absorb the flyback energy in an electric motor drive circuit for vehicle, without having to use expensive and large-sized components that a...
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JP4079694B2 |
To realize the operation of a wiper arm that does not make a user feel uncomfortable without using a CPU for a motor driving circuit in a wiper device for reciprocating the wiper arm by the normal and reverse rotation of a DC motor M. Th...
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JP4079856B2 |
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JP4079088B2 |
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JP4079554B2 |
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JP4078799B2 |
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JP4077889B2 |
An overcurrent-detecting device for a DC motor includes a converter for changing a current signal to a voltage signal in a motor; an integrator for comparing an input signal from the convertor with a first reference voltage, and for inte...
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JP2008092626A |
To provide a motor controller, an image scanner, and a motor control method wherein a motor is not reversely rotated even if an actual speed is higher than a target speed.The motor controller includes: a rotational speed detecting means ...
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JP2008092622A |
To provide a motor controller, an original reading device, and a motor control method wherein an improper cycle can be prevented from being used to compute power applied to a motor.The motor controller includes: a cycle measuring means 1...
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JP4075863B2 |
A motor control apparatus calculates a current command value based on a torque command value and a rotational speed of the traction motor, and calculates a voltage command value based on a difference between a detected current of a tract...
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JP2008086150A |
To provide a motor controller, an original reading apparatus, and a motor control method that can improve the throughput of original reading without requiring unnecessary waiting time before a motor starts moving.This motor controller co...
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JP2008085565A |
To provide an image reader capable of reducing loads on the control of the image reader for the measurement of the drive load of a carriage moving means and shortening the time from power ON to the start of an image read operation.The im...
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JP2008086104A |
To detect a motor ripple with accuracy and ease even when any apparatus ripple other than motor ripple is superimposed on the motor current of a blower motor mounted in a vehicle.An air conditioner for a vehicle is so constructed that th...
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JP2008086111A |
To stop a motor completely in a stop period when the motor is rotated at an extremely low speed by current control.Driver elements Q1-Q4 supply a drive current to the motor, while a gate circuit 51 supplies gate signals to the driver ele...
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JPWO2005122368A1 |
Provided is a moving magnet linear slider that minimizes the influence of micro-vibration when driving a linear motor, makes it easier to increase the servo gain, and can also reduce the speed ripple. The moving magnet type linear slider...
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JP2008085566A |
To rotate a motor with a dead zone at an extremely low speed.The motor controller 11, 12 controls a current value to be conducted to the motor 6, alternately sets the current value to a first current value range wherein the motor 6 is no...
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JP2008086112A |
To prevent the operation noise of a motor and mechanical portions driven by the motor from increasing when the motor is rotated at an extremely low speed.Driver elements Q1-Q4 supply a drive voltage to the motor to supply a drive current...
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JP2008079390A |
To provide a motor controller, a document scanning device, and a motor control method wherein when acceleration is started when a motor is at a stop, erroneous detection due to chattering can be prevented.The motor controller includes: a...
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JP4069238B2 |
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JP2008072805A |
To prevent undue burden on processings, while enhancing acquisition precision of information about heat generation, when managing heat generation state of a motor.The motor controller has a drive control section and a heat generation sta...
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JP2008072843A |
To inspect a motor drive circuit, without having to apply magnetic field to Hall elements.A pulse signal generation unit 10 generates a pulse signal S_FG, whose level is switched according to the magnitude relation between first and seco...
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JP2008068355A |
To provide an electric driver utilizing the rotary motion energy of a fly wheel, enabling fastener driving operation according to the operation mode of a trigger switch and a push lever switch to have good work efficiency and high energy...
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JP2008070127A |
To measure any speed within a speed range accurately even when the speed range of a motor extends from a low speed to a high speed.Encoders 33, 36 output an encoder signal having an edge number responsive to the rotation angle of motors ...
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JP2008072845A |
To suppress operational sound of a motor and a mechanical section being driven by the motor when the motor is rotated at an extremely low speed.Driver elements Q1-Q4 supply a drive current to a motor by applying a drive voltage, and a ga...
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JP2008072816A |
To prevent an electric motor from being overloaded in a carrying bed with electric assist.The carrying bed detects the number of revolutions of an assist motor 12 by using a rotation sensor 66, a CPU 61 operates a limit output by which t...
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JP2008072844A |
To stop a motor completely during a stop period when the motor is rotated at an extremely low speed by controlling the current of the motor.Driver elements Q1-Q4 supply a drive current to a motor, and a gate circuit 51 supplies a gate si...
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JP4068032B2 |
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JP2008067428A |
To change over forward and reverse rotations of a motor as quickly as possible in a forward/reverse rotation drive circuit using relays.A pair of relays is connected to a motor. From the timing T1 when an ascending command signal to one ...
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JP2008067448A |
To provide a technology for cleaning a brush motor suitable for a vehicle air conditioner.The vehicle air conditioner accumulates times T1a, T1b and T1c when a motor voltage is in a range of 0 to Vm1, and is rotated at high speed by a se...
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JP2008067560A |
To rotate a motor having a neutral zone at very low speed.Motor controllers 11 and 12 control current values conducted on the motor 6, alternately set the current values to a first current value range (namely, neutral zone) where the mot...
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JP4064765B2 |
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JP4061856B2 |
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JP4062939B2 |
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JPWO2005105548A1 |
It is a highly safe electric power steering device provided with a control device for determining a failure of the motor current detector based on the difference between the estimated motor current value and the detected motor current va...
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JP4061238B2 |
An electronic control apparatus includes target FR calculator that calculates a target exciting current duty ratio FR based on an exciting current inputted from FR terminal of a regulator and flowing through field coil, and information o...
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JP4059048B2 |
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JP4059094B2 |
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JP2008054443A |
To start and stop the driving of an electric motor by using a switching element, to shorten stop time of the electric motor, and to surely implement rotation determination in a vehicle electric motor drive circuit.The motor drive circuit...
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JP2008049779A |
To provide an electric power steering control device avoiding that braking force is generated even if failure occurs on an electric field effect transistor (FET) used for control of an assist motor and capable of reducing the consumption...
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JP2008049780A |
To provide an electric power steering control system that prevents an assist motor 11 from rotating in a direction opposite to a steering direction by a driver even if a current is supplied to the assist motor 11 in a direction opposite ...
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JP4056961B2 |
A power window driving apparatus includes a reference current generator generating a reference current. The reference current generator includes a first current generator generating a first current, a first comparison signal, and a secon...
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JP4053775B2 |
To provide a motor controller for eliminating a time lag during the operation of a motor. The motor controller comprises a switch 38 outputting a control signal through the operation of an operator, and relays 65 and 66 switching a drive...
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JP4052075B2 |
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JP2008037321A |
To provide an electric power steering control device capable of enhancing steering-holding force at the continuation of the end pressing state of a steering wheel and the locking state of a steering mechanism, easily maintaining the oper...
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