×

Monitoring health of electrical equipment

  • US 10,256,761 B2
  • Filed: 08/31/2016
  • Issued: 04/09/2019
  • Est. Priority Date: 08/31/2016
  • Status: Active Grant
First Claim
Patent Images

1. A device comprising a motor or generator and an apparatus to monitor the health of the device, comprising:

  • a plurality of stator windings of the device;

    a plurality of sensors to detect root-mean-square (RMS) current values for each of the plurality of stator windings of the device; and

    a processor to;

    receive the RMS current values from the plurality of sensors;

    convert the RMS current values to peak current values;

    determine a modified direct current, Id, and a modified quadrature current, Iq, based on the peak current values and referencing a phase angle of 120 degrees in place of an actual measured phase angle;

    compute a fault indicator based on the modified direct current, Id, and the modified quadrature current, Iq, wherein the fault indicator represents a level of current imbalance between the plurality of stator windings due to winding faults; and

    transmit the fault indicator to a display device.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×