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Motor drive device and integrated circuit device for motor driving

  • US 7,294,982 B2
  • Filed: 03/09/2006
  • Issued: 11/13/2007
  • Est. Priority Date: 09/26/2003
  • Status: Active Grant
First Claim
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1. A motor drive device comprising:

  • a three-phase DC motor output stage comprising power elements which supply output voltages to three-phase coils, and a predriver which supplies drive voltages to the power elements,wherein lower hooks with a voltage minimum phase as a first source for supplying the output voltages to the three-phase coils and upper hooks with a voltage maximum phase as a second source higher than the first source are set as patterns alternately repeated for every electrical angle of 60 degrees, and every three phase pattern is expressed in the combination of linear functions to generate sine wave-like drive voltages and the drive voltages are produced by the patterns, thereby causing sine wave-like currents to flow into the three-phase coils, anda tilt setting register provided so as to be able to change the linear inclination of each drive voltage based on the combination of linear functions.

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