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Phase current detection method, inverter control method, motor control method, and apparatuses used in these methods

  • US 20040169488A1
  • Filed: 07/29/2003
  • Published: 09/02/2004
  • Est. Priority Date: 09/29/2001
  • Status: Active Grant
First Claim
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1. A phase current detection method is a method which detects a phase current of a motor (4) based upon a DC link current and a vector pattern to be applied and which restricts the minimum pulse width, which method is included in a motor driving apparatus for driving a motor (4) by supplying outputs from a PWM inverter (3) to the motor (4), the method comprising the step of:

  • adjusting a voltage to be applied by adding positive or reversed voltage in response to a fact that a desired duty has a small value.

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