A Single Source Hybrid Nine-Level Multilevel Inverter with Extension Topology

Abstract

A new hybrid nine level multilevel inverter (H9MLI) topology is proposed and developed with the combination of switched capacitor (SC) and H-bridge structure. The main features of the proposed inverter are voltage boosting capability, reduced switch count, reduced switching control and extended vertical and horizontal topologies. In this paper, the operation modes, modulation strategy, power loss analysis and the simulation results for H9MLI and its extended topology (13 level and 17 level) are presented. The MATLAB/Simulink based simulation of the proposed inverter and its extended topologies for static and dynamic loads are analyzed and verified. The quantitative comparison indicating the merits of proposed topology over various prior-art multilevel inverter topologies were evaluated and tabulated in an inclusive way. The level shifted PWM technique is used for generating control pulses for the proposed inverter.

Keywords

• hybrid multilevel inverter
• h-bridge
• reduced components
• switched capacitor
• voltage gain