Finite element analysis of a squirrel cage induction motor with an oval stator under eccentricity conditions

A three-phase squirrel cage induction motor with an oval stator and different eccentric rotor is modeled in this paper. Finite element method is adopted to evaluate the stator currents and electromagnetic torque. The simulation results of the induction motor with circinal and oval stator are compared to find the conclusions for oval stator and rotor eccentricity diagnosis. It shows that the rotor eccentricity and the ovality of the stator are possible to be detected by analyzing the spectra of the stator currents and electromagnetic torque. The findings of this paper help to complement the condition monitoring and fault diagnosis of electrical machines.