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Commutating arrangement for an electric motor supplied from a DC voltage source

  • US 4,047,081 A
  • Filed: 02/24/1976
  • Issued: 09/06/1977
  • Est. Priority Date: 02/27/1975
  • Status: Expired due to Term
First Claim
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1. A circuit for use with an electric motor supplied from a DC voltage source comprising:

  • a commutating arrangement including transistors arranged in a bridge circuit;

    a main transistor connected to said commutating arrangement and adapted to be connected to said source;

    a first control means adapted to be responsive to the rotor position of said motor providing on-off commands for controlling said transistors of said commutating arrangement;

    a second control means for providing on-off commands to said main transistor, said second control means feeding an off command of short duration to said main transistor when said control circuit delivers an on command to one of said transistors of said commutating arrangement.

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