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논문 기본 정보

저자정보
(Korea National University of Transportation) (Korea National University of Transportation) (Korea National University of Transportation) (University of Technology Sydney) (Korea National University of Transportation)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제74권 제2호
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    초록·키워드

    As the number of electric vehicles grows, the development of fast chargers is advancing rapidly. A DC-DC converter that can deliver high output power, a fixed input voltage, and a wide output voltage range is critical for electric vehicle fast chargers. While the LLC resonant converter is commonly used in these converters, it requires a low magnetizing inductance, which increases the transformer air gap, causing additional AC losses in the windings due to the fringing effect. To mitigate these issues, this study explores design solutions in LLC resonant converters. By using two transformers per module, with the primary sides connected in series and the secondary sides in parallel, the number of primary turns can be reduced, minimizing the air gap. This reduction also allows for structural changes in the windings, improving heat dissipation. Magnetic field analysis and circuit simulations were conducted to validate the proposed DC-DC converter design.

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