A new multilevel inverter topology with reduced dc sources

Muhyaddin Rawa, P. Prem, Jagabar Sathik Mohamed Ali, Marif Daula Siddique, Saad Mekhilef, Addy Wahyudie, Mehdi Seyedmahmoudian, Alex Stojcevski

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The component count for the multilevel inverter has been a research topic for the last few decades. The higher number of power semiconductor devices and sources leads to a higher power loss with the complex control requirement. A new multilevel inverter topology employing the concept of half-Bridge modules is suggested in this paper. It requires a lower number of dc sources and power components. The inverter is controlled using a fundamental frequency switching scheme. With the basic unit being able to produce 13 level voltage waveforms with three dc voltage sources, higher-level inverter configuration has also been discussed in the paper. The performance of the topology is analyzed in the aspects of circuit parameters and found better when compared to similar topologies proposed in recent literature. The comparison provided in the paper set the benchmark of the proposed topology in terms of lower component requirements. The topology is also optimized with two voltage fixing algorithms for maximizing the number of levels for the given number of IGBTs, drivers and dc sources, and the observations are presented. The efficiency analysis gives the peak efficiency as 98.5%. The simulations were carried out using the PLECS software tool and validated using a prototype rated at 500 W. The results with several test conditions have been reported and discussed in the paper.

Original languageEnglish
Article number4709
JournalEnergies
Volume14
Issue number15
DOIs
Publication statusPublished - Aug 1 2021

Keywords

  • Asymmetrical
  • Dc/ac power conversion
  • Multilevel inverter
  • Power converter
  • Pulse width modulation
  • Reduced switch count

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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