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Fast‐scale instability in a PFC boost converter under average current‐mode control
Author(s) -
Iu Herbert H. C.,
Zhou Yufei,
Tse Chi K.
Publication year - 2003
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.253
Subject(s) - instability , control theory (sociology) , converters , boost converter , power factor , distortion (music) , mode (computer interface) , bifurcation , scale (ratio) , current (fluid) , power (physics) , line (geometry) , voltage , computer science , electronic engineering , engineering , mathematics , control (management) , physics , electrical engineering , mechanics , nonlinear system , amplifier , geometry , cmos , artificial intelligence , quantum mechanics , operating system
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.