New switching strategy controlling a new three-level voltage source inverter

M. H. Saied, M. Z. Mostafa, T. M. Abdel-Moneim, H. A. Yousef

Research output: Contribution to journalArticle

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This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states becomes 64 compared to 27 originally proposed by other modulation strategies. For a wye-connected load operating at low modulation index (Mth conduction mode is presented, eliminating the low frequency harmonics in the neutral-point current, consequently reducing the dc-link capacitors sizes, and cost. Analytical models, computer simulation results, and experimental verification are presented.

Original languageEnglish
Pages (from-to)297-308
Number of pages12
JournalAlexandria Engineering Journal
Issue number3
Publication statusPublished - May 2007



  • 150° conduction-mode
  • Neutral point clamped
  • Three-level converter
  • Total harmonic distortion
  • Voltage source inverters

ASJC Scopus subject areas

  • Engineering(all)

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