A Boost-Type Nine-Level Switched Capacitor Inverter

Yuya Nakagawa, Hirotaka Koizumi

Research output: Contribution to journalArticle

15 Citations (Scopus)


A new boost-type multilevel inverter using switched capacitor structure is proposed. The main feature of the proposed inverter is boosting and multilevel output with small number of components. Due to the passive voltage balancing of each capacitor maintains a constant voltage without additional control. In this paper, the operation principle, the modulation method, the voltage/current stresses on switches and the determination of capacitances, the simulation results with MATLAB/Simulink R2015a, the experimental results, and the 2-kW simulation are shown. The simulation and the experiments were conducted under resistive load and inductive load conditions. In addition, the load variation was conducted in the experiment. Under both resistive load and inductive load conditions, the obtained waveforms by simulation and experiment agreed well with the theory. In the load variation experiment, the obtained waveforms were not distorted and the capacitor voltages maintained constant.

Original languageEnglish
Article number8492438
Pages (from-to)6522-6532
Number of pages11
JournalIEEE Transactions on Power Electronics
Issue number7
Publication statusPublished - Jul 2019


  • Multicarrier pulsewidth modulation (PWM)
  • Multilevel inverter
  • Switched capacitor (SC)

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