A comprehensive FEM modeling of 3-phase induction motor with stator inter-turn fault.

Abstract

The dependency of major industries on Induction Motors cannot be understated. Production of these industries depends upon the reliable operation of these motors. Sudden failure of a machine may lead to huge economic loss. There are different sources of failure in an induction motor, among them bearing faults and stator inter turn fault are more common. Early detection of these faults is the only solution of preventing the machine as well as the process from devastating consequences. The stator-inter turn fault has been addressed in this research work which is based on an FEM model because among different types of approaches finite element methods(FEM) can imitate the physical machine more accurately. COMSOL Multiphysics has been chosen as the simulation tool. Simulation of the induction motor is performed with the help of this tool for two conditions. One is healthy condition and other is faulty condition. Here inter-turn fault in stator winding has only been considered. All the faults are taken as they are in their incipient stages. The stator current signature has taken for analysis. The results show that the slot harmonics have significant contribution in characterizing the stator winding inter-turn fault.