A survey on time and frequency characteristics of induction motors with broken rotor bars in line-start and inverter-fed modes
A comprehensive detailed electrical, magnetic and mechanical analysis of industrial induction motors under broken bars fault is provided in this work. Effects of line-start and inverter-fed modes, different load levels and various reference speeds is deeply investigated. Different fault indexes are intuitively compared and investigated based on their applicability via analytical and experimental results. Advantages and disadvantages of fault diagnosis procedures are identified and an appropriate global fault detection routine which is applicable at different operating conditions is proposed.
dq direct axis and quadrature axis components emf electro motive force m1 magnitude of the first harmonic mr magnitude of the right sideband component ml magnitude of the left sideband component mf magnitude of the fault component foc field oriented control emi electromagnetic interference imf intrinsic mode functions ump unbalanced magnetic pull pi proportional and integral controller gr gyration radius fft fast foriour transform mcsa motor current signature analysis ht hilbert transform hht hilberthuang transform wt wavelet transform