A Novel Step-Up Single Source Multilevel Inverter: Topology, Operating Principle and Modulation

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • Babol Noshirvani University of Technology
  • Polytechnic University of Catalonia


This paper presents a novel step-up DC to AC converter with only one power supply. These types of converters are suitable for renewable and sustainable energy applications with low input DC sources. The proposed topology has the ability of self-voltage balancing and does not apply end side H-bridge to produce a bipolar staircase waveform. Consequently, switching losses and voltage stress of semiconductor components are reduced to a great extent. A small DC voltage source can be used to achieve a high voltage high quality AC waveform through switching the pre-charged capacitors in series and in parallel. Circuit configuration and its operation principle, capacitors’ charging process, thermal model, capacitances and losses calculations are discussed in details. Moreover, the comparison of the proposed circuit with the other single source multilevel converters shows that the proposed topology reduces the number of circuit elements. Finally, a laboratory9-level prototype is built to verify the theoretical analyses and feasibility of the proposed topology. The experimental results show that the converter efficiency at 1 KW output power is 92.75%.


Original languageEnglish
Article number8387509
Pages (from-to)3269-3282
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - 1 Apr 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Capacitors, DC-AC power conversion, Efficiency, High-voltage techniques, Integrated circuit modeling, Inverters, Phase disposition pulse width modulation, Power supplies, Single source multilevel converter, Switched-capacitor technique, Switches, Topology, Voltage step-up

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