A high gain and compact size asymmetrical 17‐level inverter for medium‐ and high‐power applications

Abstract

SummaryA new structure of an asymmetrical switched‐capacitor‐based multilevel inverter topology is proposed. The circuit is capable of generating 17‐level boosted output utilizing 11 switches and two DC sources in the ratio of 1:2, having a voltage gain of 2.6 times the input voltage. The boosting capacitors were properly charge‐discharged during one complete cycle without requiring any complex control circuit for voltage balancing. The simulation model of the proposed circuit is developed in MATLAB, and the performance of the circuit is experimentally validated. The thermal modeling using PLECS software for power loss evolution is performed, and the maximum efficiency of 97.70% is achieved by implanting a low switching frequency scheme. The comparison with the other similar topologies shows the proposed topology is better than the other compared topologies in many parameters. The boosted output voltage utilizing reduced components makes the proposed topology feasible for various applications, including solar PV system.