SIMULATION OF A NOVEL MULTI LEVEL INVERTER TOPOLOGY FOR INDUCTION MOTOR DRIVE APPLICATIONS

Abstract

This paper presents a novel multilevel inverter for inductor motor drive applications. The use of MLIs in medium and high power applications are increasing due to reduced voltage stress across the switches and lower total harmonic distortion (THD) of the output waveform. But the conventional MLIs requires more number of switches as the level increases for reducing the THD of the output waveform. This paper presents a new MLI inverter topology with reduced number of power electronic components. The proposed inverter produces thirteen level output voltage using only 9 switches and a diode. For generating thirteen level output voltage conventional H-bridge MLI uses 12 switches, which increase the cost as well as switching losses. This paper presents the comparison between cascaded H-bridge MLI and symmetrical and asymmetrical configuration of the proposed inverter. Finally induction motor fed from the proposed MLI is simulated in MATLAB/SIMULINK environment and the corresponding results are presented.