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Stepping motor

  • US 5,132,603 A
  • Filed: 10/19/1990
  • Issued: 07/21/1992
  • Est. Priority Date: 10/25/1989
  • Status: Expired due to Fees
First Claim
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1. A stepping motor comprising:

  • a rotatable cylindrical rotor having a plurality of magnetized north poles and a plurality of magnetized south poles alternately arranged in a circumferential direction about the rotor;

    a stator having a plurality of stator teeth arranged about the rotor;

    coils for magnetizing the stator; and

    control means for controlling excitation of the coils to control the rotation of he rotor, the control means being arranged to rotate the rotor a predetermined amount to a selected stop position and then determine whether to maintain the excitation of the coils or to relinquish the excitation of the coils based upon the relative position of he stator teeth and the rotor poles in the stop position.

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