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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

94 Scopus Citations
View graph of relations



Original languageEnglish
Pages (from-to)611-624
Journal / PublicationInternational Journal of Circuit Theory and Applications
Issue number6
Online published7 Oct 2003
Publication statusPublished - Nov 2003
Externally publishedYes


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. Copyright © 2003 John Wiley & Sons, Ltd.

Research Area(s)

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