Dispersion field analysis using discrete wavelet transform for inter-turn stator fault detection in induction motors
Résumé
This paper presents an inter-turn short
circuit detection through the measurement of external
magnetic field of induction motor. The technique of
analysis is based on discrete wavelet transform energy in
transient state where the machine operates at start-up
and standstill states. The wavelet offers a very fine
analysis of the unidimensional and two-dimensional
signals. Through multilevel discrete wavelet
decomposition, it is possible to extract the information
for the prognosis of the fault in variable state of the
machine. The stored energy calculation in each
decomposition can evaluate the severity of the fault
compared with the analysis of only the external
magnetic field.
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