A critical challenge in power conversion in electric vehicles is the efficient use of DC-DC buck converters that need to provide 12-V supply for load systems from 400/800-V batteries. This paper presents a literature review on the development of DC-DC buck converters. Moreover, one novel four-phase interleaved step-down topology is selected for simulation and hardware experiments. Based on the four-phase interleaved structure, an extended-phase topology is proposed, which has a higher voltage conversion ratio. Control techniques are also applied to it. Theoretical analyses and simulation results are provided to verify the improved converter. A 400V-to-12V and 150W output power hardware prototype is implemented to verify its performance

中文翻译：

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用于电动汽车的超降压 DC/DC 转换器

电动汽车电源转换的一个关键挑战是高效使用 DC-DC 降压转换器，这些转换器需要通过 400/800-V 电池为负载系统提供 12-V 电源。本文对 DC-DC 降压转换器的发展进行了文献综述。此外，选择了一种新颖的四相交错降压拓扑进行仿真和硬件实验。基于四相交错结构，提出了一种扩展相拓扑，具有更高的电压转换比。控制技术也适用于它。提供了理论分析和仿真结果来验证改进的转换器。实现了400V-12V和150W输出功率硬件原型验证其性能