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MOTOR CONTROLLER

  • US 3,652,912 A
  • Filed: 12/22/1969
  • Issued: 03/28/1972
  • Est. Priority Date: 12/22/1969
  • Status: Expired due to Term
First Claim
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1. Apparatus for controlling an electrical actuator comprising:

  • means responsive to input signals commensurate with actual and desired actuator position for generating an error signal;

    bistable switch means;

    first pulse generator means responsive to said error signal for generating first switch control signals having a repetition rate directly proportional to the magnitude of the error signal;

    second pulse generator means responsive to said error signal for generating second switch control signals having a repetition rate inversely proportional to the magnitude of the error signal;

    means applying said first and second switch control signals to said bistable switch means, said first switch control signals causing said switch means to assume a first condition whereby actuator control pulses are initiated and said second switch control signals causing said switch means to assume a second condition whereby previously initiated actuator control pulses will be terminated, the width and repetition rate of the control pulses provided by said bistable switch means thereby varying directly with the magnitude of the error signal;

    a source of power for the actuator to be controlled; and

    means connected to said bistable switch means and to said power source and responsive to the control pulses provided by said switch means for applying power from said source to the actuator.

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