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System to provide low cost excitation to stator winding to generate impedance spectrum for use in stator diagnostics

  • US 6,035,265 A
  • Filed: 08/17/1998
  • Issued: 03/07/2000
  • Est. Priority Date: 10/08/1997
  • Status: Expired due to Term
First Claim
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1. A system for predicting stator winding damage in a motor during operation, comprising:

  • a signal generator coupled to a power line providing power to the motor, the signal generator introducing a high frequency signal on the power line so as to probe stator windings of the motor at frequencies substantially above a normal operating range of the motor; and

    a sensor coupled to the power line, the sensor monitoring a broadband impedance response to facilitate determining changes in capacitance between individual stator windings which is indicative of at least one of dielectric breakdown and chances in winding geometry associated with insulation of the stator windings, the changes in capacitance being manifested in the broadband impedance response.

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