Rotor Bar Broken Faults Diagnosis Based on Residual Voltage after AC Dump and WPE
Jialiang Wu · Electric Machines and Control Application · 2012
Based on many deficiencies that exist in induction motor rotor bar broken faults diagnosis,such as the signals were difficult to extract,were easily influenced by the variation of the loads and the electrical source,a method based on residual voltage after AC dump and wavelet packet entropy was introduced.Analyzed the residual voltage after AC dump and build the modal of the rotor bar broken faults.Use the frequency spectrum analysis method and wavelet packet entropy to get the fault characteristic frequency and the wavelet Shannon entropy.Through comparing with normal motor's to diagnosis the faults.Simulation showed that the residual voltage after AC dump could avoid the influence of the outer factors.The wavelet Shannon entropy could be used to diagnose the rotor bar broken faults.This method was effective,and easy to be used in engineering.