Simple analysis of a flying capacitor converter voltage balance dynamics for DC modulation

A. Ruderman, B. Reznikov, M. Margaliot

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

45 Citations (Scopus)

Abstract

Flying capacitor multilevel PWM converter with a natural voltage balance is an attractive multilevel converter choice because it requires no voltage balance control effort. Flying capacitor converter practically does not suffer from voltage balance imposed performance limitations as opposed to multiple point clamped converter. Voltage balance dynamics analytical research methods reported to date deal mostly with an AC modulation case and are essentially based on a frequency domain analysis using double Fourier transform. Therefore, these methods require high mathematical skills, are not truly analytical and rather difficult to use in an everyday practice by electrical engineer. In this paper, we consider a DC modulation case to demonstrate that a straightforward time domain approach based on switching intervals piece-wise analytical solutions makes it easy to obtain time-averaged discrete and continuous models for voltage balance dynamics simulation. A primitive single-phase single-leg three-level converter analytical investigation yields a surprisingly simple accurate expression for capacitor charge / discharge related time constant revealing its dependence on inductive load parameters, carrier frequency, and duty ratio.

Original languageEnglish
Title of host publication2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008
PublisherIEEE Computer Society
Pages260-267
Number of pages8
ISBN (Print)9781424417421
DOIs
Publication statusPublished - Jan 1 2008
Event2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008 - Poznan, Poland
Duration: Sep 1 2008Sep 3 2008

Publication series

Name2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008

Other

Other2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008
CountryPoland
CityPoznan
Period9/1/089/3/08

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Ruderman, A., Reznikov, B., & Margaliot, M. (2008). Simple analysis of a flying capacitor converter voltage balance dynamics for DC modulation. In 2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008 (pp. 260-267). [4635276] (2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008). IEEE Computer Society. https://doi.org/10.1109/EPEPEMC.2008.4635276