Seven-level single-leg flying capacitor converter voltage balancing dynamics analysis

Boris Reznikov, Alex Ruderman

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

9 Citations (Scopus)

Abstract

Time domain approach based on stitching analytical solutions for consecutive switching subintervals is applied to analysis of seven-level single-leg flying capacitor converter natural voltage balancing dynamics for Phase Shifted PWM. Expressions for voltage balancing dynamics frequencies and time constants reveal dependences on load parameters, carrier frequency, and voltage command. The root cause of poor (zero) natural voltage balancing damping phenomenon in odd-level single converters with Phase Shifted PWM is explained by analyzing specific switching topologies. The remedy may be modulation strategies that use different from classic Phase Shifted PWM switching states and provide faster natural balancing dynamics without compromising optimal voltage quality of nearest level switching, minimal integral switching loss and uniform switching loss sharing between converter switches. In particular, the amount of employed zero voltage switching states must be increased.

Original languageEnglish
Title of host publicationProceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011
Publication statusPublished - Oct 11 2011
Externally publishedYes
Event2011 14th European Conference on Power Electronics and Applications, EPE 2011 - Birmingham, United Kingdom
Duration: Aug 30 2011Sep 1 2011

Publication series

NameProceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011

Other

Other2011 14th European Conference on Power Electronics and Applications, EPE 2011
CountryUnited Kingdom
CityBirmingham
Period8/30/119/1/11

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Reznikov, B., & Ruderman, A. (2011). Seven-level single-leg flying capacitor converter voltage balancing dynamics analysis. In Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011 [6020273] (Proceedings of the 2011 14th European Conference on Power Electronics and Applications, EPE 2011).