Fast-scale instability in a PFC boost converter under average current-mode control

Herbert H.C. Iu, Yufei Zhou, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

94 Citations (Scopus)


This paper investigates the fast-scale instability in a power-factor-correction (PFC) boost converter under a conventional average current-mode control. The converter is operated in continuous mode. Computer simulations and theoretical analysis are performed to study the effects of the time-varying input voltage under the variation of some chosen parameters on the qualitative behaviour of the system. It is found that fast-scale instability may occur during a line cycle, which can cause distortion to the line current and degrade the practical power factor. The results provide useful information for the design of PFC boost converters to avoid distortion due to fast-scale bifurcation.
Original languageEnglish
Pages (from-to)611-624
Number of pages14
JournalInternational Journal of Circuit Theory and Applications
Issue number6
Publication statusPublished - 1 Nov 2003


  • Average current-mode control
  • Bifurcation
  • Fast-scale instability
  • Power-factor-correction boost converter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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