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Device for controlling the electrical power supply of a stepping motor and stepping motor equipped with such a device

  • US 5,304,910 A
  • Filed: 07/27/1992
  • Issued: 04/19/1994
  • Est. Priority Date: 01/26/1990
  • Status: Expired due to Term
First Claim
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1. Device for controlling the electrical power supply of a stepping motor having a rotor and a stator with a plurality of phases, comprising a plurality of switches each controlling a power supply from an electrical energy source to a respective phase of the stator, detecting means for detecting a simultaneous ceasing of conduction in all of the phases, and controlling means operatively connected to and excited by said detecting means, said controlling means causing conduction of one of the phases for holding the rotor with a predetermined holding torque established by the one phase.

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