A T-Shape Connected Multilevel Inverter Topology With a Reduced Number of Switching Devices

Abstract

This research endeavors a novel configuration for a single-phase Cascaded H-Bridge Multilevel Inverter (CHBMLI) using a stacked T-shape voltage generation module with a view to attaining reduced current conducting switches in the path of load. It involves the use of the collection of a string of voltage generation modules and a two-leg inverter to arrive at a novel Multilevel Inverter (MLI) topology. The MLI permits showcasing the facility of the structural design in an attempt to enlarge the scope of the CHBMLI. It follows a Multicarrier Pulse Width Modulation (MCPWM) approach for synthesizing the Pulse Width Modulation (PWM) output voltage. The prototype augurs the role of a digital PWM controller using Field Programmable Gate Array (FPGA) and the experimental outcomes validate the simulated performance in a wide range of modulation indices. The approach claims a new option of a particular topology for the MLI to suit specific applications in the real world.