Mathematical Modeling and Simulation of an Induction Motor with Stator Inter-Turn Faults

Digital simulation of an induction motor is beneficial for getting an insight into its dynamic performance and electro-mechanical interaction. A convenient model aids the simulation of faults. It also helps to predict the deviation in concerned parameters without conducting the actual experimentation. This paper presents dq, 2 axis model of three-phase induction motor with the stator winding inter-turn faults using stationary reference transformation, when the d and q axes do not rotate. The mathematical model and a MATLAB/Simulink based virtual model are developed for healthy and stator inter-turn fault conditions. The pulsations in speed and torque characteristics of the induction motor and increase in the stator winding current of faulty phase furnish the impact of the inter-turn fault on the particular phase of the stator winding. Simulated results analysis incorporates to mark the presence of inter-turn fault in the motor.