With the increasing demand for high-power and high-efficiency power conversion systems, LLC resonant converters, which achieve both high efficiency and high power density through soft-switching operation, have attracted significant attention. Accordingly, various topologies based on LLC resonant converters have been proposed; however, studies on topology analysis and selection criteria remain insufficient. Therefore, this paper analyzes device losses, voltage and current stresses, and efficiency characteristics under different output power levels based on PSIM simulations, and proposes a topology selection methodology for the primary- and secondary-side structures of LLC resonant converters.

Abstract
1. 서 론
2. 본 론
    2.1 LLC 공진형 컨버터의 모델링
    2.2 LLC 공진형 컨버터의 FHA 등가 회로
    2.3 LLC 공진형 컨버터 전압 이득 곡선
    2.4 1차 측 브리지 구조 특성 비교
    2.5 2차 측 정류 구조 특성 비교
3. 시뮬레이션
4. 결 론
후 기
References

• 정민창(Dept. of Electrical Eng., Wonkwang University) | Minchang Jeong
• 임성준(Dept. of Electrical Eng., Wonkwang University) | SeongJun Lim
• 김재혁(Dept. of Electrical Eng., Wonkwang University, Professor, Dept. of Electrical Engineering, Innovation Center for Engineering Education, Wonkwang University) | Jaehyuck Kim Corresponding author
• 서광수(Dept. of Hydrogen Mobility Eng., Woosuk University) | Kwang Su Seo
• 마지영(Dept. of Hydrogen Mobility Eng., Woosuk University) | Ji Young Ma