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Fault Detection in Induction Motors Based on Current Signature Analysis

  • US 20160266207A1
  • Filed: 03/10/2015
  • Published: 09/15/2016
  • Est. Priority Date: 03/10/2015
  • Status: Active Grant
First Claim
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1. A method for detecting faults during a steady state of an operation of an induction motor, comprising:

  • measuring, in a time domain, a signal of a current powering the induction motor with a fundamental frequency;

    determining, in a frequency domain, a set of frequencies with non-zero amplitudes, such that a reconstructed signal formed by the set of frequencies with non-zero amplitudes approximates the signal measured in the time domain, wherein the determining includes a compressive sensing via searching within a subband including the fundamental frequency of the signal subject to condition of a sparsity of the signal in the frequency domain; and

    detecting a fault in the induction motor if the set of frequencies includes a fault frequency different from the fundamental frequency, wherein steps of the method are performed by a processor.

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