X-Type Step-Up Multi-Level Inverter with Reduced Component Count Based on Switched-Capacitor Concept

Erfan Azimi, Aryorad Khodaparast, Mohammad Javad Rostami, Jafar Adabi, M. Ebrahim Adabi, Mohammad Rezanejad, Eduardo M.G. Rodrigues, Edris Pouresmaeil

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
50 Downloads (Pure)


This paper aims to present a novel switched-capacitor multi-level inverter. The presented structure generates a staircase near sinusoidal AC voltage by using a single DC source and a few capacitors to step-up the input voltage. The nearest level control (NLC) strategy is used to control the operation of the converter. These switching states are designed in a way that they always ensure the self-voltage balancing of the capacitors. Low switching frequency, simple control, and inherent bipolar output are some of the advantages of the presented inverter. Compared to other existing topologies, the structure requires fewer circuit elements. Bi-directional power flow ability of the proposed topology, facilitates the operation of the circuit under wide range of load behaviors which makes it applicable in most industries. Besides, a 13-level laboratory prototype is implemented to realize and affirm the efficacy of the MATLAB Simulink model under different load conditions. The simulation and experimental results accredit the appropriate performance of the converter. Finally, a theoretical efficiency of 92.73% is reached.
Original languageEnglish
Article number1987
Pages (from-to)1-18
Number of pages18
Issue number12
Publication statusPublished - Dec 2020
MoE publication typeA1 Journal article-refereed


  • Multi-level inverter
  • Self-balance
  • Single source
  • Bidirectional
  • Switched capacitor


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