JEE_V8_N1_RP1 Khadim Siddiqui Kuldeep Sahay V.K. Giri Journal on Electrical Engineering 2230 – 7176 8 1 11 24 Squirrel Cage Induction Motor (SCIM), Pulse Width Modulation (PWM), Insulated Gate Bipolar Transistor (IGBT), Time Domain Analysis, Bearing Fault Detection and Identification Induction Motor (IM) with electronic inverters presents greater advantages on cost and energy efficiency as compared with other industrial solutions for varying speed applications. These inverter fed-motors are recently gathering great recognition for Multi-Megawatt industrial drive applications. In this paper, a dynamic simulation model of PWM inverter fed IM has been presented and analyzed. The model has been developed in the recent MATLAB/Simulink environment to analyze the transient behaviour of IM in healthy and faulty condition of bearing. The dynamic simulation of IM is one of the key steps in the validation of the design process of the motor-drive system. It is extremely needed with the priority for eliminating the probable faults beforehand due to inadvertent design mistakes and changes during the operation. The model gives encouraging results with reduced harmonics[1]. In the present work, a successful diagnosis of bearing faults of an IM in transient condition has been carried out. Therefore, an early detection of bearing fault is possible by this model and may avoid the motor to reach in the catastrophic conditions. Consequently, this technique may save millions of dollars for industries. Further, the time domain analysis has been carried out for bearing fault detection purpose. July - September 2014 Copyright © 2014 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2995