Quasi two-level operation of a five-level inverter

G.P. Adam, S.J. Finney, B.W. Williams

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

3 Citations (Scopus)


In this paper a five-level inverter operational mode termed quasi two-level operation is proposed. The multilevel capacitors function in a soft clamping mode where capacitor voltage balancing is maintained by varying the transient dwell time at each level. Two balancing techniques are proposed. The first is based on the selection of suitable resistors to be connected across each dc link capacitor in order to maintain balance. The second method is based on varying the dwell time at the intermediate nodes of the dc link capacitors. The validity of the operational mode and the two proposed balancing techniques are confirmed by simulations and experiments.
Original languageEnglish
Title of host publicationProceedings of Compatibility in Power Electronics, 2007
Number of pages6
ISBN (Print)1-4244-1055-X
Publication statusPublished - 4 Sep 2007
Event5th International IEEE Conference on Compatibility in Power Electronics - Gdańsk, Poland
Duration: 29 May 20071 Jun 2007


Conference5th International IEEE Conference on Compatibility in Power Electronics
Abbreviated titleCPE2007
Internet address


  • capacitors
  • circuits
  • clamps
  • diodes
  • pulse width modulation inverters
  • resistors

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