Input-Series-Output-Parallel Phase-Shift Full-Bridge Derived DC–DC Converters With Auxiliary LC Networks to Achieve Wide Zero-Voltage Switching Range

Author

Zhiqiang Guo ; Deshang Sha ; Xiaozhong Liao ; Jiankun Luo

Author_Institution

Key Lab. of Intell. Control & Decision of Complex Syst., Beijing Inst. of Technol., Beijing, China

Volume

29

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

5081

Lastpage

5086

Abstract

This letter proposes an input-series-output-parallel derived dc-dc converter composed of two phase-shift full-bridge (PSFB) dc-dc converters and two auxiliary LC networks. Each LC network is connected between the leading-leg midpoint of a module and the lagging-leg midpoint of the other one. For conventional PSFB converters, the lagging-leg switches may lose zero-voltage switching (ZVS) conditions at light loads. In the proposed converter, ZVS for lagging-leg switches can be achieved with the aid of the LC networks even at light loads. The efficiency of the converter at the light load is improved. Therefore, the proposed converter is suitable for the wide load range. The feature of the converter is analyzed. The performance of the proposed converter is verified by a 900 W experimental prototype.

Keywords

DC-DC power convertors; LC circuits; phase shifters; zero voltage switching; PSFB DC-DC converters; ZVS; auxiliary LC networks; full-bridge derived DC-DC converters; input-series-output-parallel DC-DC converters; lagging-leg midpoint; lagging-leg switches; leading-leg midpoint; phase-shift DC-DC converters; power 900 W; wide zero-voltage switching range; Bridge circuits; Capacitors; Inductance; Inductors; Logic gates; Switches; Zero voltage switching; Input-series-output-parallel (ISOP) derived; LC network; phase-shift full bridge (PSFB); wide load range; zero-voltage switching (ZVS);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2014.2309342

Filename

6762973