Quadruple Boost Multilevel Inverter (QB-MLI) Topology with Reduced Switch Count

Abstract

Multilevel inverter concepts (MLIs) with switched capacitor (SC) are emerging due to their scope in sustainable energy systems as well as high-voltage applications. In the SC technique, required voltage levels can be achieved with the lesser number of dc sources in combination with the capacitor voltage. In this perspective, the design of high-gain MLI with reduced sources as well as switch count is a challenging task. This letter proposes a single-source-driven quadruple boost multilevel inverter topology (QB-MLI) with lesser order of resources over the other SC MLIs. The proposed QB-MLI is capable to produce nine levels of voltage in output by effectively balancing the two capacitor's voltage with the associated control logic. The different SC MLIs are compared to verify the pros and cons with respect to the contribution of the proposed QB-MLI topology. Detailed experimental results at various test conditions of a laboratory set-up have been presented to validate the performance of the proposed QB-MLI.