Asymmetrical interleaving strategy and AVP concept for interleaved LLC resonant DC/DC

Author

Feiyue Duan ; Ming Xu ; Xu Yang ; Yuan Yao

Author_Institution

Power Electron. & Renewable Energy Res. Center, Xi´an Jiaotong Univ., Xi´an, China

fYear

2014

fDate

16-20 March 2014

Firstpage

2003

Lastpage

2010

Abstract

Against conventional wisdom, asymmetrical interleaving strategy is proposed for two-phase interleaved LLC resonant DC/DC running at the same switching frequency to guarantee the equilibrium point of current sharing under all operation condition. Basing this strategy, adaptive-voltage-positioning (AVP) concept is further proposed for passive current sharing realization, while satisfying output voltage regulation with better dynamic performance. These concepts can also be applied into other resonant converters. The experimental result in a 1KW interleaved LLC DC/DC has verified the theoretical analysis.

Keywords

DC-DC power convertors; resonant power convertors; switching convertors; AVP concept; adaptive-voltage-positioning concept; asymmetrical interleaving strategy; current sharing; dynamic performance; equilibrium point; operation condition; output voltage regulation; passive current sharing realization; power 1 kW; switching frequency; theoretical analysis; two-phase interleaved LLC resonant DC-DC converters; Inductors; Magnetic resonance; RLC circuits; Switching frequency; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803581

Filename

6803581