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JP2009261090A |
To provide a low-cost motor controller which detects the motor current with high accuracy.A motor controller controls the motor current in an H bridge circuit which switches the rotational direction of a motor, between the forward direct...
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JP4357472B2 |
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JP4356295B2 |
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JP4356426B2 |
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JP4359310B2 |
The invention relates to an arrangement for isolating supply current from control devices, which satisfies higher safety standards while, however, being easy to operate. To this end, the inventive arrangement comprises a device for isola...
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JP2009254046A |
To provide a motor controller which diagnoses a current detection circuit without feeding a current to a motor.An MPU 60 rotates a motor 2 forward or reversely by turning the switching elements 20, 22, 30 and 32 on/off. When a current fl...
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JP2009254170A |
To provide a motor drive circuit with a simple configuration capable of preventing the generation of mal-operation or faults caused by counter-electromotive force generated in a motor.The motor drive circuit having at least one set of tw...
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JP2009254079A |
To provide a control device capable of feedback-controlling the difference in phase of a rotor without providing a sensor for sensing the difference in phase of the rotor even when an electric motor operates at a low speed or when the el...
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JP4354013B2 |
An electric circuit for determining the load current of a clocked load having at least one inductive component and being assigned a free-wheeling circuit has a shunt whose voltage drop is used to determine the current. The shunt is arran...
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JP4352446B2 |
A process for displacing a motor vehicle part between at least two positions and a drive device for executing this process in which the motor vehicle part is driven by an electric motor (10), a pulse signal is generated according to the ...
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JP2009247080A |
To provide a vehicle seat device which is reduced in the number of wiring of harnesses connected to an ECU, and reliably detects a position of a drive part.The vehicle seat device includes a drive motor 22a for driving a movable part of ...
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JP2009240383A |
To suppress vibration caused by torque ripple at low speed rotation of a motor.A motor control device 10 of a sewing machine includes: a semiconductor switching means for controlling on-off of a sewing machine motor 11; a zero-cross dete...
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JP4346828B2 |
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JP2009240117A |
To eliminate the dispersion of motor characteristics due to motor temperatures and to more precisely control the motor rotating speed.A load torque T acting on a motor 60 is detected based on an M/C pressure, and a motor current I flowin...
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JP2009229322A |
To provide a technology for predicting the length of the period where the level of a rectangular signal is the same.A period width prediction circuit 598 for predicting the period width where the level of the rectangular signal is the sa...
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JP4338494B2 |
An MPU (1) sends pieces of information supplied by the input signals from a hand switch (4) to a semiconductor memory device (3) and the memory device stores these pieces of information. These pieces of information are: input points of a...
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JP4339893B2 |
The power regulator has a semiconductor switch (12), e.g. a triac, connected in series with the electric motor (15) and operated in a phase-chopping mode via a control device (20), a series circuit connected in parallel with the semicond...
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JP4334161B2 |
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JP4337532B2 |
To provide a power tool preventing an accident caused by the change of a rotating direction during the operation of a motor. This power tool is provided with the motor 1 for rotating a driver and a drill; a direction instructing part 2 f...
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JP4337531B2 |
To rotate a motor without delay even if a power switch is intermittently and repeatedly turned on and off in a short time. In response to turn-off of the power switch SW, a control unit 1 turns on a switching element Q2 for braking conne...
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JP4335208B2 |
An inverter apparatus in which a control power source connected to a microcomputer or a peripheral circuit included in at least one of an inverter main body, a built-in option, and a parameter unit is provided in the inverter main body. ...
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JP2009213243A |
To obtain a starting device of a DC motor, which improves the starting characteristics even of a DC motor not incorporating a thermometer.A starting device of a DC motor includes: a contactor 8 for opening/closing an armature circuit whi...
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JP2009208675A |
To suppress the overrun of a wiper blade over the upper inversion position by establishing the fail-safe operation when the power supply voltage becomes unstable.When the power supply voltage of a power source 43 is below the minimum vol...
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JP2009207260A |
To provide a motor controller for diagnosing an H-bridge circuit and a current detection circuit without applying a current to a motor.Switching elements 20, 22, 30 and 32 constitute the H-bridge circuit for controlling the rotation dire...
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JP2009207340A |
To allow an object to be driven by a motor to reach a target speed in a short time while suppressing vibration of the object.At every operation timing, an increase/decrease Mu[n] of a controller-calculated amount of operation U'[n] calcu...
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JP2009207301A |
To provide a larger output torque while a rotational frequency of a motor is obtained with a back electromotive force.A motor control apparatus is provided with a means 18 of setting a rotational speed, a conduction output circuit 29 sup...
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JP4329438B2 |
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JP2009201315A |
To reduce a situation where a driving force applied to a control valve from an electric actuator may be slightly changed to constrain progression of wearing and deterioration in component parts of the electric actuator.The controller inc...
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JP2009201185A |
To provide a drive controller that can start an operating apparatus after passage of a specified time since outputting a trigger signal while starting a step-up circuit only when there is a necessity to operate the operating apparatus.In...
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JP4325090B2 |
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JP2009194962A |
To provide an electric motor equipped with an overheat protection function having no wiring to the outside and an external monitor apparatus and also to independently operate the overheat protection function in the electric motor.A first...
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JP4316610B2 |
The invention relates to a tray mechanism consisting of sliding means comprising an electrical tray motor, for moving a tray—provided for containing a disc (for example an optical disc) on which information is recorded—from a project...
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JP4314518B2 |
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JP2009528807A |
The present invention relates to a drive unit for an adjuster for an adjustable element of a vehicle, including an electric drive, and related methods. The present invention further relates to an adjustment device for an adjustable eleme...
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JP4307238B2 |
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JP2009171830A |
To provide a motor control device which can further reduce noise.The control device 10 generates a drive voltage V by weighting to a DC voltage a compensation voltage for generating compensation torque which offsets a torque variation at...
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JP2009171831A |
To provide a motor control device which can easily improve the quality of a motor-operation sound.The control device 10 generates a drive voltage V by weighting to a DC voltage an AC component of a prescribed frequency in an audible band...
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JP4303212B2 |
A motor drive comprising a first power semiconductor switching device having a pair of main current carrying terminals, the main current carrying terminals being coupled in series with a motor load; a first current control loop, the curr...
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JP4305135B2 |
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JP2009526692A |
In order to reliably detect a jamming situation, in particular in a seat adjusting means, provision is made for a total loading exerted by the drive during a start phase to be determined and for this to be fixed as the basic loading. The...
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JP4299337B2 |
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JP4298844B2 |
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JP2009159697A |
To detect a fault at a normal time, that is, at the stop of a motor, without especially rotating the motor for detecting the fault, since the control device of a seat belt retractor is primarily for operation during an emergency.This mot...
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JP2009155821A |
To provide a power window control unit which can lengthen a life of a switching element by reducing the generation of heat from the switching element for performing PWM control.During a locked period of a motor M locked in the applied st...
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JP2009154835A |
To provide a wiper device at low cost, which can be reduced in size, thereby offering higher flexibility in arrangement in a narrow space.An automatic stop circuit 11 for stopping a wiper at a pre-set stop position is connected to a driv...
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JP4296689B2 |
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JP4298169B2 |
The brushless motor [10] is controlled by a microcontroller [12] that uses variables held in a non volatile memory ,ie EEPROM [14]. A number of different current levels are used and these are selected by the controller using values trans...
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JP4296664B2 |
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JP2009153330A |
To provide a controller for an electric fan that reduces generation of vibration and noise even if the number of rotations is low.The controller for the electric fan has a section 13 for determining whether the actual number of rotations...
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JP2009153357A |
To obtain high conversion efficiency in electric power generation by a solar battery by charging the generated voltage by the solar battery while efficiently boosting the generated voltage, and furthermore by automatically and intermitte...
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