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JP2014027821A |
To appropriately perform overload determination.A drive controller comprises: a time count unit 60 for measuring lapse time Tt from an initial drive start time of a DC motor 101 after a power supply switch 71 becomes in an ON state; a po...
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JP2014027871A |
To provide a motor driving overcurrent detection circuit and a method thereof that can improve efficiency of a motor and reduce distortion of a signal.A motor driving overcurrent detection circuit includes: a motor driving part 10 which ...
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JP2014027872A |
To provide a motor driving overcurrent interruption circuit, a motor driving circuit, and its overcurrent interruption method.A motor driving overcurrent interruption circuit includes a motor driving part 10 which includes a source type ...
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JP5409618B2 |
A starter device for cranking internal combustion engines, that has a terminal for starter control, having an electric starter motor, there being an electric supply line from a plus terminal of the starter device to the plus terminal of ...
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JP5407106B2 |
To provide a motor driving controller which can securely suppress a of rush current by appropriately keeping charge voltage to a capacitor and to provide a motor power steering system using the controller. The motor driving controller in...
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JP5405903B2 |
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JP5405299B2 |
A circuit arrangement for controlling an electrical load is provided with a bridge circuit which comprises four electronic switches with the load arranged in a transverse leg of the bridge circuit. A control circuit has respective contro...
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JP2014023212A |
To provide a power tool capable of suppressing a delay in feedback control of boost adjustment by a booster circuit.The present invention includes: a booster circuit 30 that boosts a voltage supplied from a battery pack 12 as a power sup...
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JP5404212B2 |
A motor control apparatus for controlling a DC motor (100) includes a first detection means (110) configured to detect an angular velocity of the DC motor (100), a driven member (11) configured to be driven by the DC motor (100), control...
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JP5403307B2 |
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JP2014014222A |
To provide a motor drive device that is suitable for variable speed control of an AC motor or a DC motor as an electric motor fed by a three-phase voltage inverter.A control device for performing variable speed control on an AC motor or ...
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JP5396906B2 |
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JP2014007804A |
To provide a device for detecting a ripple in a DC motor which implements higher accuracy of position detection than an existing technique by measuring an overrun after the DC motor is powered down.A device 2 for detecting a ripple in a ...
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JP2014007805A |
To provide a device for controlling the speed of a DC motor which can set an arbitrary constant or variable target rotational speed and can perform speed control such that an actual rotational speed well matches the target rotational spe...
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JP5391852B2 |
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JP5385019B2 |
A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor inc...
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JP5385318B2 |
A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current component detecting device, and a rotational ...
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JP5379514B2 |
To improve responsiveness of feedback control while maintaining an operation cycle. In one cycle time TA for outputting voltage commands vd, vq, sampling timings ta, tb for detecting motor currents IU, IV, IW at a sampling cycle TB are s...
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JP5378835B2 |
To provide a motor control device that effectively reduces torque vibration of a motor by using correction value data that precisely considers the mechanical position of a brush which is likely to be different among individual DC motors....
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JP5378033B2 |
To solve the problem that overload protection is activated as integration is performed only by addition although average load currents are within rated values, in load variations and power supply beat phenomena. In the integration only b...
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JP5378698B2 |
To provide a vehicular seat device capable of reducing the wiring number of a harness to be connected to an ECU, and correctly detecting the position of a driving unit. The vehicular seat device comprises a driving motor 31 for driving a...
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JP2013255322A |
To reduce wattless current and noise of a ventilating motor fan having a PWM drive transistor built in.An electronic imaging device comprises: a PWM drive transistor; a pull up bias resistance; a ventilating motor fan having an input dio...
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JP2013251855A |
To provide an electronic device capable of preventing generation of vibration by a vibration function at power generation without using a mechanical mechanism.An electronic device comprises: a vibrator generating vibration by rotating a ...
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JP5358195B2 |
A motor-driving-circuit comprising: a first to-fourth-transistors; a drive-control-circuit to control a energization-state of a motor coil so as to be a driving-state where either one group of groups of the first-and-fourth-transistors a...
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JP2013240214A |
To switch the direction and speed of rotation of a DC motor immediately, while reducing overshoot.The DC motor driver is configured so as to release the counter electromotive force of a DC motor generated in a direction opposite from a d...
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JP5355029B2 |
A drive apparatus includes a magnet rotor having a plurality of magnetic poles that are magnetized, a stator having a magnetic pole portion that opposes each pole of the magnet rotor, a coil configured to excite the magnetic pole portion...
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JP5350508B2 |
To reduce a situation where driving force applied from an electric actuator to a control valve is slightly changed and to suppress progression of wearing and deterioration of component parts of the electric actuator.A control valve 10 dr...
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JP5348460B2 |
A state memorizing device for a movable member, includes a lock state determining portion for determining whether or not the movable member, driven by a motor, is in a locked state, based on a motor current, an initial positional informa...
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JP5342153B2 |
A motor load control apparatus capable of suppressing heat generation of an electronic switch and suppressing occurrence of noise associated with rotation of a fan and vibration of the fan is provided. A switch section (17) in which a fi...
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JP3186999U |
A DC motor assembly includes a motorized unit for generating a rotatable power at an output shaft, and a step adjusting control arrangement including an optical grating and a photocoupler. The optical grating, which is operatively couple...
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JP5333503B2 |
In a motor driving device, a driving switching element is connected in series with a motor between a power source and a ground, and operated by a PWM signal outputted from a control circuit. A return current path forming unit is connecte...
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JP5337533B2 |
This invention provides a motor drive circuit, which makes it possible to prevent braking when a power supply voltage is lower than a predetermined voltage while suppressing at a low cost a rise in a voltage on a power supply line when a...
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JP5333813B2 |
To provide a motor controller which suppresses a plurality of vibration with simple constitution, and to provide its control method and its applicable mechanical system. The motor controller includes a position control portion (1) to gen...
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JP5327935B2 |
To solve a matter that an extra precharge circuit is required for detecting the fact that the voltage in the downstream of a relay is sticking to the GND potential in order to detect a short mode failure of a transistor before a relay is...
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JP5326544B2 |
To provide an inductive load drive method for suppressing influence to surge protection even if an inductive load which is on/off-driven by on/off signals becomes an overload state. In the inductive load drive method, driving of the indu...
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JP2013219870A |
To provide a motor controller with counterelectromotive voltage compensation, capable of compensating for a counterelectromotive voltage without providing a motor speed detector, and achieving simplification, cost reduction and enhanceme...
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JP5325629B2 |
To provide a motor control device which does not need to set a waiting time up to stable rotating sensor actuation to wait for sensor actuation when the control device is shifted to a wake-up mode from a sleep mode and a voltage is appli...
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JP2013212906A |
To prevent occurrences of a conductive failure between a brush and a rectifier of a brush motor without lowering conveying efficiency in the case of driving a sheet conveying device using a brush motor as a driving source thereof at a lo...
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JP5314695B2 |
A first terminal of a protection element of a control unit is connected to a wire between a motor and a switching element, and a second terminal is directly connected to a ground-side wire shared by a controller and the switching element...
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JP5315658B2 |
To conduct the constant-speed drive of a belt using a DC motor in a state that no restriction is imposed on layouts of driven rollers and a drive roller, or the restriction is further reduced. The displacement of the belt 30 which is wou...
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JP2013201815A |
To provide a fan control device for combustion equipment that is capable of achieving size reduction and cost reduction of a driving circuit for a fan motor.An upper limit energization instruction value determination part 14 determines, ...
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JP5306154B2 |
To provide a device, method, and program for detecting a ripple of a DC motor, which precisely controls a cut-off frequency of a filter unit by precisely detecting a ripple frequency, and utilizes a precise ripple period. The DC motor ri...
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JP5303031B2 |
A method for ascertaining measured values in a cyclically controlled system, the cyclic control having control time periods in which the system is controlled, and no-control time periods in which the system is not controlled, having the ...
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JP2013198361A |
To provide a motor drive circuit that allows detecting a current and a zero point while reducing cost by eliminating an RS resistor.A motor drive circuit 100 includes: a signal control circuit 103 that receives a first voltage signal Vou...
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JP5297045B2 |
To provide a device and method of controlling a motor wherein slip and backlash are prevented in a sheet feeder and a sheet is fed by a preset feed length. A subtractor 47 subtracts a number of feel roll pulses from a number of length me...
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JP5300339B2 |
To provide a motor with a brush, capable of making a rotation speed variable even when an inter-segment voltage is reduced and a coil is wound by an intensively winding method. Teeth 9 are each provided with first coils 33U-33W wound in ...
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JP5295375B2 |
The invention relates to a method for providing a trigger signal in response to the commutation of a mechanically commutated electric motor (1). The method comprising the steps of providing a mechanically commutated electric motor (1), p...
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JP2013183463A |
To prevent decrease in a linearity characteristic of a motor.A driving apparatus is configured to switch states in one modulation period so as to include a conductive state in a first drive direction, a conductive state in a second drive...
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JP2013183482A |
To prevent the breakage of a switching element and a switch circuit when an induction voltage is generated in a motor.In a motor control device 4, power is supplied to an H bridge circuit 52 from a main relay 51 connected to a battery 5....
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JP5289103B2 |
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