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JP2008043171A |
To provide a load drive device capable of improving the stability in constant current chopping control, while avoiding mulfunctions caused by noises.The load drive device 2 performs constant current chopping control of a drive current Im...
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JP4048698B2 |
When air passing through a condenser and a radiator passes through a cooling fan in a state where a driving circuit controls a voltage applied to a motor to be constant in accordance with a motor application voltage instructed by a contr...
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JP4050185B2 |
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JP4050528B2 |
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JP4049050B2 |
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JP2008035576A |
To prevent an operator from being uncomfortable and to prevent wear of various sliding components from being accelerated surely by reducing mechanical vibration being transmitted into a car through a chassis.In PWM control for controllin...
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JP2008504136A |
Electrically powered devices are provided that are generally capable of automatically adjusting an operating speed of a tool removably connected to the device. The device includes circuitry that evaluates tool wear for the tool removably...
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JP4045706B2 |
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JP2008029083A |
To provide a load drive unit capable of drivingly controlling a motor load by PWM control with high accuracy by inhibiting increases in configuration and cost.A load drive circuit 12 supplies a motor 2 with load drive voltage based on a ...
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JP2008029185A |
To provide a regenerative control circuit for a series-wound motor.The circuit comprises a first switching element to which a second rectifier element, inversely connected in series between a field coil of a motor and an armature coil, i...
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JP2008503998A |
An eletrical device derives power from an incoming power source to produce output plower to drive the device. The device includes circuitry that determines at lehst one characteristic of the incoming power source, and adjusts the output ...
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JP4044700B2 |
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JP4043196B2 |
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JP2008022602A |
To prevent the number of printed sheets per unit time from changing suddenly by downtime for cooling of a conveying motor.An ink jet printer 1 has a conveying motor 11 which is used for conveyance of print media, a memory means 55 which ...
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JP4041211B2 |
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JP4039280B2 |
A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A...
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JP4041418B2 |
To prevent generation of a motor over-rotation and vehicle vibration when a clutch is disengaged for shift to 2WD (wheel drive), in a 4WD vehicle constructed so that a front wheel is driven by an engine, a rear wheel is driven by a motor...
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JP4036778B2 |
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JP2008011671A |
To provide a method of setting threshold value for a lock judgement by which the threshold value for lock judgement is accurately set, and to provide a motor controller.In the method of setting threshold value for the lock judgement of a...
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JP4032743B2 |
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JP4034264B2 |
A method for determining the position of a shaft of a commutated direct current (DC) motor based on the current ripples contained in an armature current signal includes digitally sampling the armature current signal to generate signal va...
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JP2008005656A |
To improve followability of an opening/closing body to a target speed by improving a regenerative braking force of an electric motor.The electric motor that drives a sliding door so as to be opened or closed is connected to an H-bridge c...
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JP2007336789A |
To provide a motor driving device in which a switching frequency of a PWM method is set to be 50kHz or higher to provide a response speed required for a motor for driving a galvanometer mirror, and, for a motor for driving a stage used f...
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JP4027319B2 |
A method and a circuit for protecting an electric motor and/or its trigger circuit against overload in the emergency-operation mode in a motor vehicle direct-current fan motor operated by means of pulse width modulation, in which the tri...
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JP4028466B2 |
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JPWO2005067134A1 |
To protect a power transistor and a motor drive circuit of a motor drive circuit capable of preventing the power transistor from being destroyed when there is a disconnection between the output terminal of the power transistor and the ot...
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JP2007330039A |
To provide an interlock circuit 60 that can prevent the burning of electronic components inside a note depositing and drawing mechanism 7 by a counter electromotive force of motors 67 (M1-M5), and an ATM1 on which the interlock circuit 6...
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JP2007330040A |
To detect motor disconnection without causing cost increase and enlargement in size, and without turning on and off switching elements, in a failure determination device of an electric motor drive circuit. In the failure determination de...
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JP4023298B2 |
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JP2007536146A |
A mechanism for a vehicle seat is includes a seat bottom supported by the vehicle and a seatback coupled to the seat bottom. The mechanism includes a first adjustment mechanism connected to the vehicle seat and operable between a locked ...
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JP4016976B2 |
To detect a failure of a current detection circuit of an electric power steering device with reliability, and to switch a control system from a feedback system to an open loop system when a failure is detected. A control system of the el...
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JP2007312578A |
To provide a motor controller capable of changing a reference value to be used as a correction reference in correcting and controlling the operation of a switching element without changing a circuit. The motor controller 100 for controll...
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JP4013116B2 |
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JP4015431B2 |
To provide an energy storage device for a press machine which can reduce the fluctuation of a power supply current during machining operation, and a press machine. Before a large driving current is supplied to a driving motor 9 when a sl...
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JP2007306710A |
To provide a motor-driven power steering system that suppresses noise harmful to peripheral equipment. This motor-driven power steering system assists a driver's steering force by conducting a current corresponding to the driver's steeri...
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JP2007306742A |
To provide a motor drive controller wherein sudden increase in battery voltage can be suppressed, when a motor is braked. A revolution number reduction detection unit 12 compares a number of motor revolutions with a predetermined width f...
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JP4012031B2 |
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JP4010239B2 |
A rotational speed controller maintains a constant low speed during idling, a constant high speed when a load is applied and controls motor rotational speed in the range between low and high speed to ensure safe operation when used in an...
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JP4012012B2 |
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JP4012013B2 |
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JP4011816B2 |
The motor driving apparatus comprises a plurality of motors 11 to 14 for displacing the position of the control object member, semiconductor switch pairs 4 to 8, a plurality of motor driving units 21 to 23 for connecting the motors 11 to...
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JP4012645B2 |
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JP2007300788A |
To provide a fan system capable of achieving effects, such as simple manufacture, a decrease in thermal energy in a drive, a decrease in costs, and an increase in output efficiency. The fan system comprises: a first switch S1; a second s...
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JP4007344B2 |
An electrically operated drive controller includes first and second electric current command value calculation means which calculate first and second electric current command values based on a target value of torque of an electrically op...
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JP4007345B2 |
An electrically operated drive controller includes first and second electric current command value calculation processors, for calculating first and second electric current command values from a target value of torque of an electrically ...
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JP4008000B2 |
To provide a torque controller for a power tool capable of securely setting an initial set torque. The torque controller for the power tool includes a switching circuit, a voltage detection circuit, a torque detection circuit, and a proc...
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JP2007290429A |
To provide an apparatus for controlling an electric power steering system, which can perform a steering assistance under furthermore various states of the voltage of an electric power source when the voltage of the electric power source ...
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JP2007295660A |
To avoid bad effect due to variation in manufacturing of a semiconductor integrated circuit device. In an current detecting circuit, offset adjustment of an operational amplifier OP2 enables adjustment of currents flowing through a rever...
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JP4002950B2 |
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JP4002893B2 |
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the ...
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