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JP4481752B2 |
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JP2010130804A |
To provide a configuration that properly reduces an increased drive current even when a drive current flowing in a DC motor is changed into an overcurrent state in a mobile terminal including a vibrator. A mobile terminal 1 includes a vi...
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JP4478966B2 |
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JP4479320B2 |
To change the characteristics of an electric motor in three stages through a simple circuit. In a first state in which a switch 86 for low speed is on and a switch 88 for high speed is off, the electric motor 58 has low-revolution, high-...
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JP4474662B2 |
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JP4475552B2 |
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JP2010123044A |
To detect an overcurrent condition in accordance with a wire range of duty ratio.The overcurrent protection circuit 12 is formed by a coil L1, a capacitor C1, a differential circuit 8, and a circuit made mainly of an overcurrent determin...
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JP4469886B2 |
According to the present invention, the operation of a diagnostic circuit within a load drive circuit, which has been built into an electronic control device, is checked without modifying the electronic control device or the like. The lo...
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JP2010119210A |
To detect a load of a DC motor compatible with various loads.A control part 1 which drive-controls a motor 3 includes: a motor drive voltage detection circuit 5; an angular acceleration calculation part 8a connected to a motor rotation s...
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JP4468031B2 |
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JP4465829B2 |
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JP2010114963A |
To provide a motor controller wherein it is possible to more accurately recognize the rotational position of a motor in a configuration without a rotational position sensor.The motor controller includes: a first pulse wave generating mea...
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JP2010110078A |
To restore data in an operation position at a volatile storage medium even if initial setting is not performed again when applied voltage is normally restored even if applied voltage to a detecting part of a motor actuator loaded on a ve...
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JP2010110084A |
To provide a DC motor apparatus which can inexpensively control rotation of a DC motor with a simple structure and to provide a window switching device equipped with the DC motor apparatus.The DC motor apparatus includes the DC motor 1, ...
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JP2010110171A |
To provide a motor control apparatus capable of reducing the estimation error of motor torque and a motor load caused by a temperature change.The motor control apparatus includes: a temperature sensor 4 and a temperature detection circui...
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JP2010110092A |
To provide a drive device that accurately ensures and maintains reliability of an overcurrent protection function even when a threshold voltage for determining the presence or the absence of an overcurrent of a power element is set on th...
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JP4462871B2 |
A back electromotive force detection circuit 12 incorporates an A/D conversion circuit 14 that converts the output from a differential amplifier circuit A 2 into a digital signal and an offset calculation circuit 15 that sets the resista...
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JP2010104138A |
To prevent a field effect transistor 31 from intermittently operating.When a decision is made that a PTC thermistor 34 is in temperature protection state for controlling the change in gate-source voltage, a CPU 43 outputs a stop signal t...
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JP2010098907A |
To provide an overcurrent protection circuit capable of efficiently protecting damages of a power driver due to an overcurrent while effectively utilizing the current-resistance capability of the power driver to regulate energization of ...
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JP4458414B2 |
A plurality of reference signals output from a controller which computes an operation amount of an electric actuator is subjected to the logical operation, and the power supply to a drive circuit for the electric actuator is shut off bas...
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JP4458926B2 |
In an electric power steering apparatus in which a third motor target current is determined from a first motor target current determined on the basis of a detection torque from a steering torque detection means and a second motor target ...
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JP4459242B2 |
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JP4457618B2 |
A pump drive motor control apparatus controls a motor used for driving a hydraulic pump. Every time the supply of electricity to the motor is resumed (every time the motor control signal changes from a low level to a high level), the app...
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JP4453517B2 |
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JP4455075B2 |
The device has a current control value generator for generating current control values for a motor with a poly-phased winding. A detecting unit detects line currents circulating across the motor. A microcontroller (5) includes an anti-ov...
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JP2010088199A |
To provide a motor control circuit with a built-in trigger switch, capable of securing the stop and control of a motor by preventing an increase in a switch form.A first MOS transistor F1 supplies power to the motor M from a power supply...
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JP4451651B2 |
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JP2010081725A |
To provide an electrical device which is equipped with a detection means for detecting the overheat state of a brush motor without complicating the assembly structure of the electrical device.An electrical device 1 includes: a brush moto...
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JP4445978B2 |
A cooling system is provided with a motor drive device, a fan motor, and a Hall element. The motor drive device includes a lock protection circuit and a lock controller. When a control signal instructing rotation of the fan motor that is...
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JP4447949B2 |
In order to realize initializing sequences with high accuracy and high reproducibility, a positioning device according includes an XY slider movable in directions X and Y, an object position measuring device for measuring the position of...
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JP4446752B2 |
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JP4446402B2 |
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JP2010068592A |
To provide an highly efficient and inexpensive DC wiper-motor with brushes, which can vary the rotational speed of the motor in three speed steps including a low speed, a high speed and an ultra-high speed, receiving little influence of ...
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JP4435623B2 |
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JP4438089B2 |
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JP4438608B2 |
In order to protect semiconductor switching-devices employed in an H bridge circuit against an over-voltage without using a special protection circuit, a control circuit outputs a control signal to a driving circuit for driving the H bri...
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JP4438668B2 |
A battery (12) is connected to a printed circuit board (PCB) (10) on which a control switching unit (7) is mounted. A microcomputer (2) mounted on the PCB controls the control switching unit in a pulse width modulation (PWM) control mode...
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JP4438619B2 |
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JP4433547B2 |
A motor rotational pulse generating circuit for a motor is provided which generates a correct pulse signal even at an initial turning-on stage of the motor, by adjusting a filter cutoff frequency in response to motor rotational condition...
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JP4431904B2 |
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JP4435068B2 |
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JP4434000B2 |
To provide a motor rotation data detecting method and a motor rotation data detecting device capable of detecting rotation data accurately without causing a braking time to become longer when stopping a motor, even if rotational speed is...
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JP4435585B2 |
Torque ripple of a motor due to a rotation detection device is reduced. A periodicity gain multiplier 51 multiplies the rotation angle ΒΈ of a detection target by a ripple periodic number m per rotation of the detection target. An adder ...
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JP4432755B2 |
To provide an electronic device which drives a load on the basis of signal input from an outside, wherein inspection terminal blocks are provided and downsizing of these are attained. Substrates 2a, 2b, a load driving circuit 90, a contr...
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JP4434709B2 |
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JP4428140B2 |
An electronic control unit for producing a sufficiently boosted voltage even when a supply voltage becomes high includes an inverter that drives switching elements and converts a DC voltage into an AC voltage, and booster means which boo...
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JP4424589B2 |
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JP4424813B2 |
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JP4423904B2 |
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JP4422306B2 |
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