Inter-Turn Fault Analysis of Three Phase Induction Motor

Induction motor is the most popular electric drive in industrial and other applications because of its reliable and rugged construction. As like the other motors induction motor also subjected to different faults such as open winding stator fault, short circuit stator fault, bearing fault etc. Among these faults the most severe one is the short circuit fault which is first developed as inter-turn fault across the stator winding. Therefore, timely fault detection is necessary for the continuous operation of the motor. Motor Current signature analysis is one of the effective and commonly used method for the detection of short circuit fault. But in Induction motor fed from PWM Inverters MCSA cannot able to detect the fault. In this paper the FEA analysis of inter turn fault is done in ANSYS Maxwell. The Finite Element Analysis is performed for 16% and 25% stator turns short are in Ansys Maxwell 2D. The MATLAB/Simulink model of faulty motor is developed. The results obtained in inter-turn faulty conditions are validated experimentally.