A Novel Seven level inverter with Common-Leg Configuration by Employing Transformers

Abstract

This paper proposes a new multilevel inverter with a common leg structure using three transformers and eight power semiconductor devices. The intended configuration contains of one traditional H-bridge and two half bridges supplied from a single dc source. The switching power circuit powered three transformers with series connections, which produced seven levels (3VDC, 2VDC, VDC, 0, -VDC, -2VDC, -3VDC) at the inverter output from the source VDC. Further, this circuit demonstrates the benefit of fewer switches and drivers in comparison to the traditional circuits for the production of the same load voltage levels. Thus, the suggested topology complexity, volume, and cost are reduced. Finally, the effectiveness of the suggested inverter is performed using MATLAB, and the simulation studies are incorporated. © 2022 IEEE.