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Motor winding test output waveforms

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    Motor winding test output waveforms

    Winding test results on a motor indicate possible degradation when the output waveforms show:

    A-Winding waveform symmetry
    B- Noticeable difference in winding waveforms
    C- Chopped waveforms on grounded windings
    D- Chopped waveforms on phase ungrounded windings


    Does anyone know what kind of winding test they are talking about? I got this question from someone who took the level 3 but I'm not sure if its word for word.

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    Quote Originally Posted by samair99 View Post
    Winding test results on a motor indicate possible degradation when the output waveforms show:

    A-Winding waveform symmetry
    B- Noticeable difference in winding waveforms
    C- Chopped waveforms on grounded windings
    D- Chopped waveforms on phase ungrounded windings


    Does anyone know what kind of winding test they are talking about? I got this question from someone who took the level 3 but I'm not sure if its word for word.
    The answer is B - the waveforms should basically overlap one another in a clear symmetry. When one winding is shorted or is degraded, the waveform will have a similar shape, but does not overlap with the other good windings in the motor.

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