THREE-LEVEL HALF-BRIDGE INVERTER BASED ON THE THREE-STATE SWITCHING CELL

Abstract – This paper presents a half-bridge three-level inverter, based on a commutation cell of three states. The principle of operation of this inverter is described and the main theoretical waveforms are presented, as well as the simulations and experimental results. The main expressions for the design of the inverter are also presented. This inverter presents the following advantages over the classic inverter: the frequency at the load is twice the switching frequency; the amplitude of the output voltage is half that of the classic converter; the load current is divided amongst the switches, therefore reducing the conduction losses. In light of its characteristics, we believe that inverter is appropriate for industrial applications. Index Terms — half-bridge inverter, three-level inverter, three-state cell. I