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Active deadtime control for improved torque ripple performance in electric machines

  • US 6,914,399 B2
  • Filed: 10/14/2002
  • Issued: 07/05/2005
  • Est. Priority Date: 07/09/2002
  • Status: Expired due to Term
First Claim
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1. A method for implementing active deadtime control of an inverter associated with an electric motor, the method comprising:

  • receiving a command voltage signal indicative of a desired load to be driven by the motor;

    determining, based upon the value of said command voltage signal, a value of deadtime to be applied to switching circuitry in the inverter;

    adjusting the value of said command voltage signal in response to said value of deadtime, thereby producing a compensated command voltage signal to be applied to the motor through the switching circuitry in the inverter; and

    wherein said value of deadtime relates to an amount of time in which the switching of a device in the switching circuitry is delayed so as to prevent a short circuit condition within the inverter.

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