Rotor Broken Bar Fault Diagnosis of Induction Motors Based on Feature Frequency Extraction of the Electromagnetic Torque Signal
Huang Jin · Jiangsu Electrical Engineering · 2005
The instantaneous frequency extraction principle of the signal complex wavelet transformation is analyzed.The instantaneous frequency extraction algorithm based on the phase information of the signal complex wavelet transformation coefficients is presented.The rotor broken bar fault characteristics in the startup electromagnetic torque can thus be extracted using the proposed method and can credibly diagnose the rotor broken bar fault.The result of electromagnetic torque calculation and experiment is provided.Experimental results demonstrates that the rotor broken bar fault diagnosis method is available.