Fault diagnosis of alternating electromagnetic machine in apparatus
Yi Ting Yang · Dianli zidonghua shebei · 2005
LabVIEW-based wavelet packet analysis and energy measuring is used to diagnose faults of alternating electromagnetic machines in apparatus.Although the amplitude of the defective vibra-tion signal changes in time domain,the fault type and degree of the alternating electromagnetic machine cannot be determined.A fault identification system based on energy ratio and fault type for the electromagnetic machine is brought forward,which constructs the mapping relationship between energy ratio and fault type.By using the wavelet packet,the vibration signal is decomposed and re-constructed to achieve its abrupt change information and the associated fault character information.The experimental results show that the proposed method is effective to diagnose the fault type and degree of alternating electromagnetic machine.