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논문 기본 정보

자료유형
학술대회자료
저자정보
Hiromu Saeki (Okayama University) Kazuhiro Umetani (Okayama University) Tomohide Shirakawa (Ariake National College of Technology) Masataka Ishihara (Okayama University) Eiji Hiraki (Okayama University)
저널정보
전력전자학회 ICPE(ISPE)논문집 ICPE 2023-ECCE Asia
발행연도
2023.5
수록면
1,731 - 1,737 (7page)

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초록· 키워드

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In many practical LLC DC-DC converters, the isolation transformer is commonly designed to have a secondary-side center-tapped configuration with one-turn secondary windings. Conventionally, the rectification circuit is installed outside the transformer. However, the recent LLC converters are designed to operate at increasingly high switching frequencies, which indispensably causes the proximity effect in the rectification circuit as well as the wire that connects this circuit to the transformer secondary windings, resulting in large copper loss generation outside the transformer. The previous paper addressed this problem by proposing a secondary winding structure integrating the rectification circuit, although this structure caused the parasitic resonance inside the rectification circuit and reduced the rectification efficiency. To prevent the reduction in the rectification efficiency, this paper proposes an improved winding structure based on the printed-circuit-board technology for suppressing parasitic resonance. The experiment revealed further improvement in the rectification efficiency compared to the previously-proposed structure, suggesting the effectiveness of the proposed winding structure.

목차

Abstract
I. INTRODUCTION
II. PREVIOUS WINDING STRUCTURE
III. PROPOSED WINDING STRUCTURE
IV. EXPERIMENT
V. CONCLUSIONS
REFERENCES

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