Full-bridge soft switching PWM converter with saturable inductors at the secondary side

Author

Kwon, B.-H. ; Kim, J.H. ; Jeong, G.-Y.

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Kyungbuk, South Korea

Volume

146

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

117

Lastpage

122

Abstract

An improved full-bridge (FB) soft switching DC-DC converter with saturable inductors at the secondary side is presented and analysed. The main devices are switched on under zero-voltage conditions using the energy stored in the secondary saturable inductors. On the other hand, the secondary diodes are switched off under zero-current conditions due to the large inductance of the saturable inductors when it is not saturated. The advantages of this converter include a wide load range with zero-voltage-switching (ZVS) and zero-current-switching (ZCS), a large effective duty ratio, and no secondary voltages spikes, in addition to high power density and high efficiency. Experimental results obtained on a 6 kW prototype are discussed,

Keywords

DC-DC power convertors; PWM power convertors; bridge circuits; inductance; inductors; switching circuits; 6 kW; DC-DC converter; full-bridge soft switching PWM converter; high efficiency; high power density; inductance; large effective duty ratio; saturable inductors; secondary side; 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:19990189

Filename

757960