Unified theory of extended-period quasiresonant converters

Author

Cheng, K.W.E. ; Evans, P.D.

Author_Institution

Dept. of Electr. Eng., Hong Kong Polytech., Hung Hom, Hong Kong

Volume

147

Issue

2

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

119

Lastpage

130

Abstract

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

Keywords

resonant power convertors; switching circuits; DC/DC converters; ZCS; ZVS; extended-period circuits; extended-period quasiresonant converters; extended-period resonant switch; off-line power supply; output power regulation; power factor correction; quasiresonant switch; switching technique; transcutaneous electrical nerve stimulation; zero-current switching; zero-voltage switching;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20000239

Filename

838063