A Generalized Two Axes Model of a Squirrel-Cage Induction Motor for Rotor Fault Diagnosis

Abstract

A generalized two axes model of a squirrel-cage induction motor is developed. This model is based on a winding function approach and the coupled magnetic circuit theory and takes into account the stator and the rotor asymmetries due to faults. This paper presents a computer simulation and experimental dynamic characteristics for a healthy induction machine, machine with one broken bar and a machine with two broken bars. The results illustrate good agreement between both simulated and experimental results. Also, the power spectral density PSD was performed to obtain a stator current spectrum.