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DC Motor control circuit

  • US 4,271,383 A
  • Filed: 08/04/1977
  • Issued: 06/02/1981
  • Est. Priority Date: 08/06/1976
  • Status: Expired due to Term
First Claim
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1. In a DC motor control circuit comprising a DC motor adapted to be driven in response to an operating voltage applied thereto and braking means defining a current path coupled in parallel with said DC motor for selectively braking said DC motor in response to a control signal applied thereto, the improvement comprising DC supply means for producing a DC signal, constant voltage means coupled intermediate said DC supply means and the parallel connection of said braking means and DC motor for selectively applying a constant operating voltage to said DC motor, said constant voltage means being adapted, in response to a control signal applied thereto, to cut-off the application of a constant operating voltage to said DC motor, and control means coupled directly to said constant voltage means and directly to said braking means for coincidentally applying a control signal to said constant voltage means and to said braking means to coincidentally brake said DC motor and cut-off the application of said operating voltage to said DC motor.

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