Impact of rotor inter-turn short circuit fault upon performance of a wound rotor induction motor

This paper investigates the performance of a wound rotor induction motor (WRIM) under rotor inter-turn short circuit fault using magnetic equivalent circuit (MEC) and finite elements method (FEM). Impacts of the fault on the signals of the motor including rotor current, stator current, and developed torque of the motor are addressed. Current of short circuit turns signal is considered here. This MEC-based method estimates different inductances of WRIM in which the impact of yokes, stator and rotor tooth, windings distribution and also core saturation are included. The obtained inductances are compared with that of the FEM and effect of the short circuit turns on the inductances are investigated.