Design of nine step switched capacitor multilevel inverter and its cascaded extension

Summary

Conventionally, multilevel inverter topologies require components like boost converter, voltage balancing circuits in addition to its switches and gate driver circuitry resulting in increased complexity. A new multilevel inverter topology using the concept of switched‐capacitor (SC) is proposed in this article. The basic structure capable of generating 9 level (9L) output voltage waveform with magnitude twice the input voltage at its terminals is proposed. Further, two identical structures are cascaded horizontally to attain 17 level (17L) based on structural modification is suggested. Simulation results are used to analyze the performance of the proposed 9L‐SCMLI and 17L‐SCMLI in the aspects of total harmonic distortion, R, RL, and dynamic loading conditions. The 9L‐SCMLI prototype model is developed to validate the adaptability of the proposed system.