Design and implementation of interleaved LLC half-bridge resonant converters

Author

Cherg-Huei Liang ; Tsorng-Juu Liang ; Kai-Hui Chen ; Hui-Wen Liang

Author_Institution

Dept. of Electr. Eng./Adv. Optoelectron. Technol. Center (AOTC)/Green Energy Electron. Res. Center (GREERC), Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2014

fDate

5-8 Nov. 2014

Firstpage

1509

Lastpage

1512

Abstract

In this paper, interleaved LLC half-bridge resonant converters are designed and implemented. In order to increase output power, two LLC resonant converters are parallel-connected. The gate driver signals of two LLC converters are interleaved by 90° to reduce output-current ripple. Besides, switch losses on power devices can be reduced by zero voltage switching (ZVS) and zero current switching (ZCS) on output diodes. The characteristics of the proposed topology are discussed, and the operation principles and control circuit design are also addressed in this paper. Finally, interleaved LLC half-bridge resonant converters with input 380~420 V and output 24 V/20 A is implemented to verify the theoretical feasibility.

Keywords

resonant power convertors; zero current switching; zero voltage switching; ZCS; ZVS; control circuit design; current 20 A; gate driver signals; interleaved LLC half-bridge resonant converters; operation principles; output-current ripple reduction; parallel-connected LLC resonant converters; power devices; switch loss reduction; voltage 24 V; voltage 380 V to 420 V; zero current switching; zero voltage switching; Equivalent circuits; Power conversion; Power generation; Switches; Switching frequency; Zero current switching; Zero voltage switching; LLC resonant converter; interleaved control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Application Conference and Exposition (PEAC), 2014 International

Conference_Location

Shanghai

Type

conf

DOI

10.1109/PEAC.2014.7038089

Filename

7038089