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Apparatus for starting a switched reluctance motor

  • US 5,497,064 A
  • Filed: 03/14/1995
  • Issued: 03/05/1996
  • Est. Priority Date: 03/14/1995
  • Status: Expired due to Term
First Claim
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1. A switched reluctance electronic motor comprising:

  • a rotor mounted for rotation about an axis and including a plurality of rotor poles;

    a stator surrounding said rotor and including at least three stator phases; and

    a circuit for controlling said motor, the circuit including pulse means for supplying a seek current to each of said phases of said motor without causing rotation of said rotor, said seek currents in said phases each having a respective seek current rise time which is a function of the proximity of said rotor poles to said respective phases;

    timing means for measuring the amount of time required for said seek current in each phase to reach a predetermined seek current threshold;

    comparing means for comparing said seek current rise times and for establishing a priority sequence determined by which of said phases has the lowest seek current rise time, the intermediate seek current rise time, and the highest seek current rise time; and

    energizing means connected to said comparing means for energizing a selected one of said phases based upon said priority sequence to cause rotation of said rotor.

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