System and method for detecting a motor shorting relay failure

Details System and method for detecting a motor shorting relay failure System and method for detecting a motor shorting relay failure

2006-10-31

2009-08-04

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

With signals, meters, recorders or testing devices

C318S299000, C318S515000, C318S516000, C318S790000, C324S418000, C324S500000, C324S701000

Reexamination Certificate

active

07570004

ABSTRACT:
Methods and systems for detecting a motor shorting relay failure. Exemplary embodiments include methods and systems for determining a motor shorting relay failure in a motor, the motor having first phase winding in a first leg of the motor, a second phase winding in a second leg of the motor, and a third phase winding in a third leg of the motor, the method including applying a first voltage signal to the first leg, applying a second voltage signal to the second leg, applying a test voltage to a test circuit electrically coupled to the third leg, measuring a third voltage signal in the third leg at a first predetermined time in response to the application of the first and second voltage signals and determining a motor shorting relay in the motor, based on the amplitude of the third voltage signal.

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