Design of output filter in LLC resonant converters for ripple current reduction in battery charging applications

Author

Sang-Min Park ; Dong-Hee Kim ; Dong-Myoung Joo ; Min-Jung Kim ; Byoung-Kuk Lee

Author_Institution

Coll. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

fYear

2015

fDate

1-5 June 2015

Firstpage

2050

Lastpage

2056

Abstract

In this paper, a filter design guideline to reduce the ripple current in LLC resonant converters for the battery charger is proposed. The effect of filter inductor on the resonant network is mathematically analyzed, and a filter inductor is designed considering capacitance of the battery. The voltage gain of LLC resonant converter with filter inductor is analyzed through fundamental harmonic approximation (FHA) method. This research verifies performance of ripple current reduction compared with conventional LLC resonant converter without output filter inductor through mathematical analysis, simulation and experimental results.

Keywords

battery chargers; power conversion harmonics; power harmonic filters; resonant power convertors; LLC resonant converter; battery capacitance; battery charger; filter inductor; fundamental harmonic approximation method; output filter; ripple current reduction; Batteries; Battery chargers; Capacitance; Capacitors; Inductors; Mathematical model; Power harmonic filters; Battery; Charger; LLC resonant converter; Ripple current;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference on

Conference_Location

Seoul

Type

conf

DOI

10.1109/ICPE.2015.7168060

Filename

7168060