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JP2009150362A |
To extend life of a capacitor for holding a battery voltage provided for a starter control device for controlling a motor current of a direct current motor used as a starter for starting a gas turbine and to improve safety and working ef...
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JP4293219B2 |
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JP4293064B2 |
A motor drive device for driving of a plurality of motors in a proper manner, having a first motor, a second motor, and a current controller. The first motor is able to drive at up to a first maximum permissible current of A 1 . The seco...
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JP2009148114A |
To obtain a compact and lightweight moving body drive controller having the same function as a relay unit, and enables electrical connection surely and easily with a soldering material requiring no lead component.A semiconductor relay 18...
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JP4289923B2 |
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JP2009142034A |
To provide a power feeding device that prevents the occurrence of a fault of a control circuit of an H-type bridge circuit, efficiently converts an input current into a coil current, and reduces a switching loss.The power feeding device ...
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JP2009142011A |
To remove the influence of power transmission loss from a command value 105 that was optimum in ideal state to correct it and suppress degradation in throughput without impairing the stability of a control system.A motor is preliminarily...
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JP4283241B2 |
To provide a cooling fan control unit capable of preventing a decrease of rotational frequency of a cooling fan due to aging. A cooling fan 10 for cooling equipment includes a voltage supply circuit 35 including a plurality of resistance...
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JP4284277B2 |
The electrical motor (1) is controlled by pulse width modulated, PWM, signals (S) that are generated by a pulse generator (5) that provides two pulse sequences (P1,P2). These are fed to voltage converters (6) and a pulse flank generator ...
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JP4281395B2 |
To enable failsafe functioning in case of communication failure without additionally loading non-multiplet lines besides a multiplex communication line. This device comprises a microcomputer 2 which receives a request for wiper operation...
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JP2009131085A |
To prevent a failure by avoiding abnormal generation of heat from each power element when a plurality of power elements are connected in parallel.A fan driving unit 10 for controlling a current to be supplied to a motor includes a first ...
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JP4276951B2 |
A selectively protected electrical system includes or operates with a power source, a load, a power driver circuit for controllably transferring power from the power source to the load, the power driver circuit being encapsulated in a po...
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JP4278227B2 |
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JP4275314B2 |
Electrical direct current actuators, which have a distinct low-pass behavior with respect to the actuating signal, are frequently used in electronic control and regulation devices. Typical examples of such actuators are d.c. motors or el...
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JP4274777B2 |
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JP4276871B2 |
A monitoring device for an electrical machining tool, in particular for temperature monitoring with an accumulator-driven machine, includes a switch element ( 12 ) for separating an electrical consumer ( 14 ) from a current supply device...
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JP4274650B2 |
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JP2009124890A |
To reduce a manufacturing cost and to improve the flexibility in design, on detecting failure of sensors serving for detecting the actual operating conditions of a driven object.A motor control apparatus controls a DC motor 15, based on ...
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JP4270978B2 |
The invention relates to a failure detection system for an electric power steering system. The system detects ON failure of one of first to fourth switching elements of an H-bridge circuit of the electric power steering system. The syste...
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JP4273272B2 |
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JP4269945B2 |
To provide a control system of a superconducting motor improved in the stability of an output of the superconducting motor, enhanced in the bending processability of a superconducting member and reduced in a manufacturing cost. In this c...
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JP2009520453A |
A method and a device for controlling and/or regulating an electric motor. Such electric motors are used for example in motor vehicles in the form of pump motors. In general, the electric motor is supplied with electrical energy from a b...
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JP4266806B2 |
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JP4265498B2 |
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JP4266690B2 |
In an electric motor-driven power steering apparatus which comprises a bridge circuit for connecting a power source between input terminals and also connecting an electric motor between output terminals and energizes the electric motor b...
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JP4263193B2 |
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JP2009100517A |
To provide a motor driving circuit which is properly equipped with both a constant current control function and an overcurrent control function.The motor driving circuit includes a constant current control circuit, which sets a drive mod...
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JP2009091855A |
To provide an opening and closing device which can switch between a high-speed brush and a low-speed brush of a driving motor without relying on positional information of an opening and closing body.A rotation sensor 27 outputs a rotatio...
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JP2009082534A |
To enable a rotation speed sensor to be eliminated, to reduce costs and to increase reliability while maintaining the rotation speed controlling performance in a drum-type washing machine.A separate excitation direct current motor 4 is u...
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JP4254563B2 |
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JP4253923B2 |
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JP4252928B2 |
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JP4252197B2 |
To prevent the fluctuation of the number of revolution caused by the fluctuation of power voltage in a current fixed control mode. The DC voltage of a power source is given to the inverted terminal of an operation amplifier OP1 and a mot...
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JP4252838B2 |
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JP4247232B2 |
An electric power steering device changes the non-continuous, non-linear component in the duty ratio of the PWM signal versus motor current generated during steering wheel handle return into linear characteristics to suppress noise and a...
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JP2009071969A |
To provide an overload current control circuit for DC motor which can protect a DC motor against overload.The overload current control circuit for DC motor is constituted by connecting a DC motor, a DC power supply, a power semiconductor...
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JP2009072048A |
To suppress heat generation of an element.A temperature detecting part 21 is arranged on each side or back of four switching elements that compose a full bridge circuit 15 to detect the temperature of each switching element. A comparator...
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JP4244412B2 |
A device for determining a rotational number of an electric dc motor which drives a moving body of an automobile accessory such a sunroof, or a glass pane of a power window includes a switched capacitance filter for eliminating noise fro...
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JP4241412B2 |
When a variable valve mechanism (112) which varies an opening characteristic of an engine valve (105,107) is malfunctioned, the power supply to a drive circuit (113) for the variable valve mechanism (112) is stopped, and also a control s...
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JP4240517B2 |
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JP4240912B2 |
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JP4239723B2 |
A generator-motor apparatus includes a control circuit, an alternator, electrode plates, and switching devices. The electrodes plates have a substantial horseshoe shape, and are provided on an end surface of the alternator so as to surro...
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JP2009055673A |
To provide a motor controller capable of stopping a motor at a proper timing without forcibly executing complicated computation.The motor controller is provided with: a driven object; a motor; a measuring means for measuring the temperat...
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JP2009055758A |
To suppress an overcurrent generated by a sky fault or a ground fault.A motor driver circuit has a driver circuit controlling the conduction of a motor coil connecting one end to a connection point by complementarily turning on or off a ...
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JP4236151B2 |
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JP2009050089A |
To stop a motor appropriately even if the rotational situation of a motor cannot be known and to sustain the stop state.The controller includes a motor generating a drive force dependent on a current being conducted, a driver which can s...
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JP2009050088A |
To control the rotational speed of a motor such that the acceleration is moderated as the rotational speed increases.The controller includes a motor generating a drive force dependent on a current being conducted, a driver which can swit...
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JP4232358B2 |
To provide technique with which a direct current for applying preheat to a motor is measured with ease. A current sensor 47 is provided with a function of measuring the sum of currents passed through phase U negative side, phase V negati...
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JP4234267B2 |
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JP4234031B2 |
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