Capacitor balance issues of the diode-clamped multilevel inverter operated in a quasi two-state mode

Grain Philip Adam, S.J. Finney, A. Massoud, B.W. Williams

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

A new operational mode for diode-clamped multilevel inverters termed quasi two-level operation is proposed. Such operation aims to avoid the imbalance problem of the dc-link capacitors for multilevel inverters with more than three levels and reduces the dc-link capacitance without introducing any significant voltage ripple at the dc-link nodes. The proposed operation can be generalized for any number of levels. The validity of the proposed multilevel inverter operational mode is confirmed by simulations and experiments on a prototype five-level diode-clamped inverter.
Original languageEnglish
Pages (from-to)3088-3099
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Volume55
Issue number8
DOIs
Publication statusPublished - Aug 2008

Keywords

  • multilevel inverter
  • neutral point clamped
  • capacitors
  • invertors
  • power semiconductor devices
  • semiconductor diodes

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