Boundaries between fast- and slow-scale bifurcations in parallel-connected buck converters

Yuehui Huang, Herbert H C Iu, Chi Kong Tse

Research output: Journal article publicationConference articleAcademic researchpeer-review

3 Citations (Scopus)


This paper studies a system of parallel-connected dc/dc converters under master-slave current sharing and proportional-integral (PI) PWM control. Two distinct types of bifurcations can be identified. Depending on the value of the integral time constant, the system exhibits either a slow-scale bifurcation (Neimark-Sacker bifurcation) or a fast-scale bifurcation (period-doubling). Extensive simulations are used to capture the behaviour. Trajectories before and after these bifurcations are shown. The boundaries between these two types of bifurcations are located. Parameter spaces of the feedback controller for stable and unstable operation are presented.
Original languageEnglish
Article number4253164
Pages (from-to)2419-2422
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
Publication statusPublished - 27 Sep 2007
Event2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, LA, United States
Duration: 27 May 200730 May 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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