An improved full-load-range isolated ZVS-PWM DC-DC converter

Author

Baggio, J.E. ; Hey, H.L. ; Pinheiro, J.R.

Author_Institution

Univ. Federal de Santa Maria, Brazil

Volume

2

fYear

2001

fDate

2001

Firstpage

708

Abstract

This paper presents an improved DC-DC converter with half of the input voltage across main switches, operating with zero voltage switching (ZVS) at full-load-range. No extra active components are necessary to achieve ZVS. Soft commutation is possible due to the presence of auxiliary resonant inductors. Two series inductors assure ZVS at high current load, while two parallel inductors assure ZVS at light current load. In this way, ZVS can be obtained for full-load-range. These features are especially interesting for applications such as telecommunications and battery charging. Analysis of the converter operation, as well as design procedures to define the values of inductors that maximize the converter efficiency are presented. Experimental results of a 1.5 kW prototype converter operating at 100 kHz with isolated 60 V/25 A output are presented. The measured efficiency was 92% at full load

Keywords

DC-DC power convertors; PWM power convertors; commutation; power inductors; switching circuits; 1.5 W; 100 kHz; 25 A; 60 V; 92 percent; auxiliary resonant inductors; battery charging; converter efficiency optimisation; design procedures; improved full-load-range isolated ZVS-PWM DC-DC converter; series inductors; soft commutation; telecommunications; Batteries; Circuits; DC-DC power converters; Electromagnetic interference; Filters; Inductors; Resonance; Switches; Switching converters; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE

Conference_Location

Anaheim, CA

Print_ISBN

0-7803-6618-2

Type

conf

DOI

10.1109/APEC.2001.912448

Filename

912448