Method and apparatus for predicting winding failure using zero c

Details Method and apparatus for predicting winding failure using zero c Method and apparatus for predicting winding failure using zero c

1994-09-28

1996-01-30

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318798, 318805, H02P 736

Patent

active

054882818

ABSTRACT:
A method and apparatus to be used with a motor controller for determining the degree of rotor winding failure and stator winding failure using current zero crossing times of the stator winding currents. An error signal sequence, consisting of phase angle errors between consecutive zero crossings over a sampling period, is generated and analyzed in different regions of interest in either the time or frequency domain, producing signals with varying amplitudes, the signal amplitudes together with other motor parameter measurements being used to determine the degree of rotor winding failure and stator winding failure.

REFERENCES:
patent: 4481448 (1984-11-01), Bishop
patent: 4851744 (1989-07-01), Kotzur et al.
patent: 5334923 (1994-08-01), Lorenz et al.
patent: 5450306 (1995-09-01), Garces et al.

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