Method and circuit for controlling a position-controlling DC mot

Details Method and circuit for controlling a position-controlling DC mot Method and circuit for controlling a position-controlling DC mot

1988-08-16

1990-12-11

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

Multiple mode systems

318626, G05B 1106

Patent

active

049773607

ABSTRACT:
The present invention is drawn towards a method and a circuit for controlling a position-controlling DC motor, a system for controlling DC motor, and a system for controlling linear displacement in accordance with the method. The motor (3) has a shaft and is controlled in accordance with an error signal (.epsilon.) by generating a sequence of variable duty ratio pulses on the basis of the error signal, thereby controlling the motor. The mean value of the pulses is proportional to the difference between the instantaneous position of the motor shaft and a desired or set position at which the motor shaft should stop. Such apparatus may be used to control the orientation of a headlamp and/or an antenna.

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Electrical Design News, vol. 28, No. 10, May 1983, pp. 195-206, Boston, Mass., U.S., J. Williams et al., "Use Motor-Drive IC to Solve Tricky Design Problems", (FIG. 5).
Paul Horowitz and Winfield Hill, "The Art of Electronics", Cambridge University Press, 1980, pp. 162-163.

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