Comparative study of unity power factor circuits

Ka Wai Eric Cheng, P. D. Evans

Research output: Journal article publicationConference articleAcademic researchpeer-review


This paper investigates the use of boost and Cuk topologies in unity power factor correction circuits. The topologies include classical switched mode power supply, quasi-resonant zero current switching and extended-period quasi-resonant circuits. They all operate with continuous input current. Control methods are presented. They are duty ratio, switching frequency and constant frequency-extended period. The implications of power factor, harmonic distortion and switching frequency on the topologies are presented in order to compare performance.
Original languageEnglish
Pages (from-to)614-619
Number of pages6
JournalIEE Conference Publication
Publication statusPublished - 1 Dec 1994
Externally publishedYes
EventProceedings of the 5th International Conference on Power Electronics and Variable-Speed Drives - London, United Kingdom
Duration: 26 Oct 199428 Oct 1994

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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