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Apparatus and method for controlling an electric motor

  • US 20030184248A1
  • Filed: 03/10/2003
  • Published: 10/02/2003
  • Est. Priority Date: 03/27/2002
  • Status: Active Grant
First Claim
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1. An apparatus for controlling an electric motor provided to drive a movable object such that a detected actual amount of motion of a movable portion of said electric motor or said movable object coincides with a target amount, comprising:

  • control-condition changing device operable to change at least one of a resolution of detection of said actual amount of motion and a voltage to be applied to said electric motor, depending upon said target amount; and

    a feedback motor controller operable to control said electric motor by application of said voltage, on the basis of said target amount and said actual amount of motion detected with said resolution of detection, such that the detected actual amount of motion coincides with said target amount.

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