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Apparatus and method for determining normal start up of sensorless motor

  • US 7,358,694 B2
  • Filed: 03/07/2006
  • Issued: 04/15/2008
  • Est. Priority Date: 03/08/2005
  • Status: Active Grant
First Claim
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1. An apparatus for determining a start-up of a sensorless motor, the apparatus comprising:

  • a timer that determines whether a predetermined time has elapsed after a start-up of the motor is initiated;

    a motor velocity determiner that determines whether a velocity of the motor exceeds a predetermined velocity value when the predetermined time has elapsed;

    a current value determiner that determines whether a current flowing in the motor exceeds a predetermined current value when the velocity of the motor does not exceed the predetermined velocity value; and

    an abnormal start-up determiner that determines that the motor has been abnormally started up when the amount of current does not exceed the predetermined current value when the velocity of the motor does not exceed the predetermined velocity value.

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