Design of a reduced component transformer based multilevel inverter

The paper deals with the design of an asymmetric multilevel inverter producing maximum level with optimal number of circuit components. The objective of this paper is to design a multilevel inverter keeping all necessary points of interest like overall robustness, lower harmonic distortion, reduced voltage stress, efficiency and simplicity of the circuit. The proposed circuit is designed to generate 15 levels of voltage. A transformer at output is used to boost voltage with a half bridge circuit at secondary terminal for polarity reversal. Pulses are generated for the proposed configuration using Nearest Level Control technique. The proposed inverter is compared with other recent topologies based on various factors such as number of components, voltage stress, overall performance, etc. Its extension for producing higher levels is also described. The simulation with result verification is carried out to validate the proposed circuit.