Abstract
Traction motors for urban rail transit have complex structures, high power-to-weight ratios, and internal coupling of electromagnetic fields, temperature fields and stress fields. If the urban rail transit traction motor enters the fault operation state, the distribution of electromagnetic field, stress field and temperature field will change drastically. This paper analyzes the parameter changes of the urban rail transit traction motor after the occurrence of demagnetization fault, rotor eccentricity fault and short-circuit Fault. D-S evidence theory, wavelet packet energy spectrum and SVM are used to diagnose and classify motor faults.
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