Stator current signature analysis of healthy induction motor using time stepping finite element method

Abstract

Application of MCSA for diagnosis of induction motors requires a well previously knowledge of various frequency components in stator current spectrum of motor in healthy state. This paper takes a closer look on healthy stator current spectrum content, which offers an important new contribution to enrich the most famous technique of fault diagnosis of induction motors. In aim to assure the obtaining of high space harmonics of motor, the TSFEM is used to model the healthy induction motor. The rotor and stator slotting are taken into account. Moreover, the paper reports an investigation about the magnetic saturation influence on the content of healthy stator current spectrum, for this purpose the linear and non-linear permeability are included in induction motor model. In order to show the impact of varying load on the healthy stator current spectrum content, the simulation results are extracted at different loads.