Switched-Capacitor Based Multilevel Inverter Topologies: A Design Methodology

Abstract

Over the last few decades, the research related to multilevel converters has exponentially raised. The use of switched-capacitor (SC) based modules in multilevel inverters is a well-established area of study within the field of power electronic converters. Also, for a few years, single-stage SC-based boost inverters are extensively researched which can be linked to the number of papers published. Without the use of bulky inductors or transformers, the voltage-boosting capability can be achieved with the integration of SC modules with multilevel inverters. In recent years, several SC modules have been developed for the integration with MLIs to increase the number of levels and/or the voltage gain. In this paper, a design methodology for the SC-based multilevel inverter has been discussed. The design methodology has been divided into three different sections of the converter and different combinations have been discussed. Lastly, a comparison table has been provided considering all the developed topologies using a single SC modules.