Coupled magnetic circuit method and permeance network method modeling of stator faults in induction machines

The aim of this paper is to present and compare two modeling methods of the inter-turn short circuit fault in the stator winding of a cage induction machine. The first method is a Coupled Magnetic Circuit Method (CMCM) and the second method is a Permeance Network Method (PNM) which allows taking into account the saturation effect on the fault signature. The simulation results show that by proper modeling of induction machine it is possible to detect the effect of inter-turn short circuit faults on the machine line currents. The effect of saturation on the machine line current signature is discussed. The detailed equations describing the performance of the machine in the two cases of modeling under inter-turns short circuit faults are presented. Simulation results are compared for both healthy and faulty cases.