An integrated interleaved dc-dc converter with ultrahigh voltage gain and reduced voltage stress based on the coupled-inductors and switched-capacitor circuits is proposed in this article, which is suitable for interfacing the low-voltage energy sources, such as fuel-cell, with a high-voltage dc bus in electric vehicle applications. Input-parallel connection of the coupled-inductors offers a reduced input current ripple and the current rating of components, as well as automatic input current sharing without a dedicated current sharing controller. A promising power-density improvement technique is given, in which only one magnetic core is utilized to implement two coupled-inductors that can provide the filter functionality, as well as transformer behavior. For suppressing the voltage ringing resulting from the leakage inductors, the active-clamp configuration is employed that can facilitate the soft-switching performance for all switches in a wide range of output power. A voltage multiplier stage is adapted to not only boost the voltage gain but help alleviate the reverse-recovery problem of diodes. The steady-state performance, theoretical analysis, and a comparison with the state-of-the-art converters are given in this article. Finally, the experimental results of a 1-kW, 100-kHz prototype are provided to confirm the validity of the proposed concept.

中文翻译：

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集成交错式超高升压DC-DC转换器，使用双交叉耦合电感器和内置输入电流平衡的电动汽车

本文提出了一种基于耦合电感器和开关电容器电路的，具有超高电压增益和降低电压应力的集成交错式DC-DC转换器，适用于连接低压能源（例如燃料电池），在电动汽车应用中具有高压直流总线。耦合电感的输入-并联连接可降低输入电流纹波和组件的额定电流，并且无需专用电流共享控制器即可实现自动输入电流共享。给出了一种有前途的功率密度改进技术，其中仅利用一个磁芯来实现两个可以提供滤波器功能以及变压器性能的耦合电感器。为了抑制由漏感引起的电压振铃，采用有源钳位配置，可以在很大的输出功率范围内促进所有开关的软开关性能。电压倍增器级不仅适合于提高电压增益，而且有助于减轻二极管的反向恢复问题。本文给出了稳态性能，理论分析以及与最新型转换器的比较。最后，提供了1kW，100kHz原型的实验结果，以验证所提出概念的有效性。并与最新的转换器进行了比较。最后，提供了1kW，100kHz原型的实验结果，以验证所提出概念的有效性。并与最新的转换器进行了比较。最后，提供了1kW，100kHz原型的实验结果，以验证所提出概念的有效性。