Simplified quasi-Z source indirect matrix converter

Shuo Liu, Baoming Ge, Xinjian Jiang, Haitham Abu-Rub, Fang Zheng Peng

Research output: Contribution to journalArticle

5 Citations (Scopus)


Conventional matrix converters have a limited voltage gain less than 0.866 and also require many power switches and additional input filter that ensures a low input current harmonics to the grid. Quasi-Z source (qZS) indirect matrix converter can provide high voltage gain and ensure a sinusoidal input current without additional input filter, which requires 12 power switches in rectifier stage. In this paper, a simplified qZS indirect matrix converter is proposed to overcome aforementioned limitations and achieve (1) higher voltage gain than 0.866, (2) less power switches, and (3) LC-filter function integrated in qZS network to avoid additional filter. The new converter's operating principle and equivalent circuits are analyzed, and the modulation method is presented. The input current closed-loop control is employed to implement sinusoidal input current waveform even though the proposed converter has less power switches and without extra input filter. A test bench is used to verify the simplified qZS indirect matrix converter and control methods. Simulation and experimental results identically validate the proposed converter system with wide voltage gain range and low input current harmonics.

Original languageEnglish
Pages (from-to)1775-1793
Number of pages19
JournalInternational Journal of Circuit Theory and Applications
Issue number11
Publication statusPublished - 1 Nov 2015



  • AC-AC converter
  • matrix converter
  • quasi-Z-source inverter
  • space vector modulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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