研究開発レター
1.5倍の固定昇圧比を有するEV搭載バッテリ用ZVS共振形スイッチトキャパシタコンバータ
2023 年 143 巻 1 号 p. 78-79
詳細
2023 年 143 巻 1 号 p. 78-79
As electric vehicle (EV) battery voltages are increasing from 400V to 600-800V, an on-board boost converter with 1.5X step-up conversion ratio is required to utilize existing 500V chargers. This paper proposes a zero-voltage switching (ZVS) resonant flying switched capacitor converter with 1.5X fixed step-up conversion ratio. The theoretical model of efficiency and circuit volume reveals that, in comparison with a conventional zero-current switching topology, the proposed ZVS converter achieves higher efficiency and reduced circuit volume by eliminating fixed losses of semiconductor devices. The experimental results of a 1-kW prototype agreed well in terms of efficiency and circuit volume, verifying the theoretical model.
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