Four-level single-leg flying capacitor converter voltage balance dynamics analysis

Boris Reznikov, Alex Ruderman

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

18 Citations (Scopus)

Abstract

Flying capacitor converter is an attractive multilevel converter choice due to its natural voltage balance property. Averaged voltage balance dynamics analytical research methods reported to date are essentially based on a frequency domain analysis. They require high mathematical skills and the solutions are not truly analytical and difficult to use in an everyday practice. In this paper, a straightforward time domain approach based on stitching of analytical solutions for consecutive switching intervals is applied to a four-level single-leg converter. Small parameter analysis yields physically meaningful simple accurate closed-form expressions for averaged oscillating voltage balance dynamics revealing the dependences of voltage balance frequency and time constant on load parameters, carrier frequency, and normalized DC PWM voltage command. Averaged voltage balance dynamics for AC PWM is obtained by averaging on AC fundamental period.

Original languageEnglish
Title of host publication2009 13th European Conference on Power Electronics and Applications, EPE '09
Publication statusPublished - Dec 1 2009
Externally publishedYes
Event2009 13th European Conference on Power Electronics and Applications, EPE '09 - Barcelona, Spain
Duration: Sep 8 2009Sep 10 2009

Publication series

Name2009 13th European Conference on Power Electronics and Applications, EPE '09

Other

Other2009 13th European Conference on Power Electronics and Applications, EPE '09
CountrySpain
CityBarcelona
Period9/8/099/10/09

Keywords

  • Converter circuit
  • High voltage power converters
  • Modulation strategy
  • Multilevel converters
  • Pulse Width Modulation (PWM)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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  • Cite this

    Reznikov, B., & Ruderman, A. (2009). Four-level single-leg flying capacitor converter voltage balance dynamics analysis. In 2009 13th European Conference on Power Electronics and Applications, EPE '09 [5279315] (2009 13th European Conference on Power Electronics and Applications, EPE '09).