FAULT ANALYSIS FOR VOLTAGE SOURCE INVERTER DRIVEN INDUCTION MOTOR DRIVE

Induction motor is the commonly used motor for drive applications in almost many industries now-a-days due to its simple and robust construction. Speed control of induction motor is required depending on the type of application. Speed of the induction motor can be varied by varying terminal voltage or frequency. Variable voltage and frequency can be fed to induction motor using an inverter circuit which is found efficient method of controlling induction motor drive. Inverter consists of power electronic switches and faults are of common occurrence in inverters due to failure in switching cell. This paper presents the fault analysis of inverter driven induction motor with switch open and switch short fault conditions. Performance characteristics of induction motor was studied before and during fault condition along with analysis of phase voltage, line voltage and line current from inverter. Simulation work was carried out for the proposed work using MATLAB/SIMULINK software and results were presented for switch open and switch short type of fault conditions