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Interior permanent magnet machine systems and methods for controlling interior permanent magnet machines

  • US 8,552,673 B2
  • Filed: 02/28/2011
  • Issued: 10/08/2013
  • Est. Priority Date: 02/28/2011
  • Status: Active Grant
First Claim
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1. An Interior Permanent Magnet (IPM) machine system comprising:

  • an IPM machine including a nominal operating direct current (dc) bus voltage; and

    a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based the nominal operating dc bus voltage and the detected operating dc bus voltage, wherein the controller is configured to detect an operating rotor shaft speed of the IPM machine, determine a ratio of the detected operating dc bus voltage to the detected operating rotor shaft speed and control the IPM machine based on the determined ratio.

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