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Controlling torsional shaft oscillation

  • US 7,948,197 B2
  • Filed: 01/18/2008
  • Issued: 05/24/2011
  • Est. Priority Date: 02/27/2007
  • Status: Expired due to Fees
First Claim
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1. A system for minimizing torsional oscillation of a shaft, said system comprising:

  • a converter for providing a drive signal in response to receiving power wherein the converter has a separately excited field and the drive signal is a function of the excitation of the separately excited field;

    a motor for providing torque to the shaft in response to the drive signal provided by the converter;

    a sensor for sensing a torsional strain of the shaft;

    a regulator for producing a compensation signal as a function of the torsional strain of the shaft; and

    an excitation circuit responsive to the sensor for regulating the separately excited field to vary the drive signal as a function of the compensation signal such that torsional strain of the shaft is attenuated.

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