Unified equivalent modeling for stability analysis of parallel-connected DC/DC converters

Ming Li, Chi Kong Tse, Herbert H C Iu, Xikui Ma

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)

Abstract

A unified equivalent modeling approach is proposed for enabling simple and effective analysis of stability of parallel-connected buck converters. Two kinds of active current-sharing schemes are considered, i.e., the masterslave scheme and democratic scheme. By applying elementary transformation to the Jacobian of the averaged model, two decoupled subsystems (which determine common-mode and differential-mode stabilities, respectively) have been found, irrespective of the specific type of active current-sharing scheme. From the decoupled subsystems, the parameters of interest that affect different stability issues are clearly identified. Results from this work greatly simplify the stability analysis and design of parallel-connected dcdc converters.
Original languageEnglish
Article number5613924
Pages (from-to)898-902
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume57
Issue number11
DOIs
Publication statusPublished - 1 Nov 2010

Keywords

  • Active current sharing
  • averaged model
  • bifurcation
  • parallel-connected buck converters
  • stability

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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