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System and method for off-line impulse frequency response analysis test

  • US 20010038290A1
  • Filed: 05/03/2001
  • Published: 11/08/2001
  • Est. Priority Date: 05/04/2000
  • Status: Active Grant
First Claim
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1. A system for testing a winding, comprising:

  • a signal generator, the signal generator configured to generate a plurality of input signals that are applied to the winding;

    an input signal sensor configured to detect the plurality of input signals applied to the winding;

    an output signal sensor configured to detect a plurality of output signals, each one of the output signals corresponding to one of the input signals after each of the input signals have propagated through the winding;

    a processor communicatively coupled to the signal generator and to the sensor, the processor programmed to perform the steps of;

    computing for each one of the plurality of input signals an auto-spectral density (Gxx) based upon a frequency response X(f) of each input signal;

    computing a cross-spectral density (Gxy) based upon the frequency response X(f) of each input signal and a frequency response Y(f) of the associated output signal of the plurality of output signals; and

    computing the characteristic signature [H(f)] for the winding based upon Gxy and Gxx for pairs of associated input and output signals.

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