A Five-level Dual Inverter Using the Virtual Space Vector PWM technique

Dual inverters can produce an output of five different levels at a voltage ratio of 1:0.33. However, this multilevel operation is incomplete due to the lack of effective vectors. This paper introduces a new modulation method that solves this problem by introducing virtual vectors to supplement the missing space vectors. The proposed method maximizes the ability of the dual inverters to produce five-level outputs and significantly improves the power quality of the outputs.