Unified theory of extended-period quasiresonant converters

Ka Wai Eric Cheng, P. D. Evans

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)


A switching technique for the conversion of an ordinary switch or quasiresonant switch into an extended-period resonant switch is presented. The advantages are that a converter operates under zero-current or zero-voltage switching conditions and can be controlled by either switching frequency or duty ratio or both for the regulation of the output power. Families of extended-period circuits have been developed, and the theory of the extended-period switches is explained. Analysis, simulation and experimental test are used to verify the theory. A number of applications including DC/DC converters, power factor correction, off-line power supply and transcutaneous electrical nerve stimulation are presented.
Original languageEnglish
Pages (from-to)119-130
Number of pages12
JournalIEE Proceedings: Electric Power Applications
Issue number2
Publication statusPublished - 1 Jan 2000

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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