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Method for driving three phase stepping motor

  • US 5,283,510 A
  • Filed: 05/29/1992
  • Issued: 02/01/1994
  • Est. Priority Date: 06/03/1991
  • Status: Expired due to Term
First Claim
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1. A method for two-three phase driving of a three-phase stepping motor having a Y-connection with three respective coils and terminals comprising the steps of:

  • a) energizing the respective coils, to provide a two-phase excitation, by an input driving current having values at the respective coils defined by a set of normalized values which are ±

    0.87 and 0;

    b) energizing the respective coils, to provide a three-phase excitation, by an input driving current having values at the respective coils defined by a set of normalized values which are ±

    1 and ±

    0.5,c) repeating, alternately, steps a) and b) to provide two-three phase excitation driving of said three-phase stepping motor, wherein the normalized values during two-phase excitation are achieved by varying the input driving current between the two-phase excitation of step a) and the three-phase excitation of step b),whereby the input driving current values for the respective coils approximate a sine wave having the normalized values of ±

    1, ±

    0.87, ±

    0.5 and 0 in order to minimize vibration.

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