Publication

Abstract : This paper investigates an electromagnetic signature study of a closed loop speed controlled three phase Induction Motor (IM) fed from a PWM (pulse width modulated) inverter under single broken bar rotor fault using Finite Element Method (FEM) analysis co-simulated with MATLAB Simulink environment. As the electromagnetic field signatures of the IM contains the entire information in relation to the position of stator, rotor and mechanical parts of the machine, a continuous monitoring of airgap electromagnetic fields can be used for the identification of rotor broken bar fault in IM. In this direction, IM with a healthy and rotor broken bar model is created using ANSYS Maxwell Finite Element Analysis (FEA) tool and various electromagnetic field parameters like flux lines, flux density and radial airgap flux density distribution are studied. In addition, a study is done on the voltage induced in the end connection of the squirrel cage rotor for healthy and broken bar IM. The power electronic converter with its control scheme is modeled in MATLAB Simulink and co-simulated with ANSYS Simplorer and ANSYS Maxwell to integrate all the components in one common simulation platform environment for exact design and analysis for realistic simulation.