Design and Simulation of PV Based Multi Level Inverter to Reduce Leakage Current FED Induction Motor Drive

Abstract

The proposed modulation technique attains reduced common mode voltage with simplicity in implementation of the modulation technique. This work presents the comparison of various multicarrier based Pulse Width Modulation (PWM) techniques for the chosen single phase CMLI (Cascaded Multi Level Inverter). Multilevel inverters are a source of high power, often used in industrial applications and can use either sine or modified sine waves. A multilevel inverter uses a series of semiconductor power converters (usually two to three) thus generating higher voltage. Reverse leakage current in a semiconductor device is the current from that semiconductor device when the device is reversing biased. In earlier method transformer is used for generating multilevel output and grid synchronization. Transformer increases the leakage current. Now transformer less method and sine modulation techniques are presented to reduce the leakage current. It has been illustrated that the proposed modulation technique has less leakage current as compared to the two and three-level inverters. The proposed concept can be implemented to PV based MLI to reduced leakage current fed IM drive using MATLAB/SIMULINK software.