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Motion control system self-calibrating

  • US 8,466,639 B2
  • Filed: 12/23/2009
  • Issued: 06/18/2013
  • Est. Priority Date: 12/23/2009
  • Status: Active Grant
First Claim
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1. A method for self-calibrating a motion control system for responding to motion within a range of frequencies, comprising:

  • providing, by a position detector associated with the motion control system position information, within an intended range of motion, of an armature;

    providing a motion directing calibration signal of a known frequency content, to cause the motion control system to provide current to a plurality of coils of a multiphase motor, the multiphase motor comprising the coils, a magnetic structure, the armature and a plurality of phases, each of the phases corresponding to one of the plurality of coils;

    commutating current provided to the plurality of coils so that the net force resulting from an interaction of the current in the plurality of coils with the magnetic structure with the known frequency content is zero if the actual position of the armature corresponds to the position information as provided by the position detector; and

    detecting motion, at the pre-determined frequency, of the armature resulting from the motion directing signal.

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