TRANSIENT FINITE ELEMENT ANALYSIS OF INDUCTION MACHINES WITH STATOR WINDING TURN FAULT

In this paper, a time stepping two-dimensional FEM is performed for modeling and analysis of a IM with insulation failure inter-turn fault. FEM analysis is used for magnetic fleld calculation and the magnetic ∞ux density and vector potential of machine is obtained for healthy and faulty cases. Comparing the magnetic ∞ux distribution of healthy and faulty machines helps to detect the in∞uence of turn fault. The machine parameters (self and mutual inductances) are obtained for IM with inter-turn fault. Finally, the FEM machine model is used for studying the machine under difierent fault condition. Study results including phases and fault currents express the behavior of machine with inter-turn faults. The symmetrical current components of IM with difierent fault severity are obtained by FE study and studied. The machine torque in healthy and faulty condition is also obtained and compared. The torque vibration increase upon to degree of fault.