An isolated ZVS/ZCS flyback converter using the leakage inductance of the coupled inductor

Author

Chung, Henry ; Hui, S.Y.R. ; Wang, W.H.

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong

Volume

45

Issue

4

fYear

1998

fDate

8/1/1998 12:00:00 AM

Firstpage

679

Lastpage

682

Abstract

This paper describes a simple and effective way to modify an existing hard-switched flyback power converter into a circuit with zero-voltage switching (ZVS) and zero-current switching (ZCS). The key improvement is to turn the unattractive features of the coupled inductor leakage inductance and snubber capacitor into attractive ones. The coupled inductor leakage inductance and snubber are used to form a quasi-resonant circuit to facilitate ZVS/ZCS of all power devices. The operating principles of the power converter and experimental results are presented

Keywords

DC-DC power convertors; magnetic leakage; power capacitors; power inductors; resonant power convertors; snubbers; switching circuits; ZCS; ZVS; coupled inductor; experimental results; flyback power converter; leakage inductance; operating principles; quasi-resonant circuit; snubber capacitor; soft-switching; zero-current switching; zero-voltage switching; Capacitors; Coupling circuits; Inductance; Inductors; Leg; Snubbers; Stress; Switching converters; Zero current switching; Zero voltage switching;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.704900

Filename

704900