Steady-State Induction Machine Model with Turn Faults and Voltage Harmonics

A model of the Induction Machine (IM) considering the harmonics of the power supply network is presented in this paper. Unlike previous models that consider the effect only on the fundamental frequency component, the proposed model allows to evaluate the effect of an interturn short-circuit faults on the harmonic components. This is very useful for the development of the fault diagnostic strategies capable of isolating the stator faults of other usual disturbances in the industrial applications, such as the unbalance or distortion of the power supply voltage or the high-resistance connection, among others. The steady-state IM equivalent circuits with stator fault derived from the dynamic model in qd reference frame are presented. Finally, the behavior of the proposed model for different fault conditions and IM operations are analyzed by simulation results.