The DC-DC converter for fuel cell vehicles should be characterized by high-gain, low voltage stress, small size and high-efficiency. However, conventional two-level, three-level and cascaded boost converters cannot meet the requirements. A new non-isolated DC-DC converter with switched-capacitor and switched-inductor is proposed in this paper, which can obtain high-gain, wide input voltage range, low voltage stresses across components and common ground structure. In this paper, the operating principle, component parameters design, and comparisons with other high-gain converters are analyzed. Moreover, the state-space averaging method and small-signal modeling method are adopted to obtain the dynamic model of converter. Finally, simulation and experimental results verify the effectiveness of the proposed topology. The input voltage of the experimental prototype ranges from 25 V to 80 V. The rated output voltage is 200 V and rated power is 100W. The maximum efficiency is 93.1% under rated state. The proposed converter is suitable for fuel cell vehicles.

中文翻译：

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一种应用于燃料电池汽车的新型高增益DC-DC变换器


燃料电池汽车用DC-DC变换器应具有高增益、低电压应力、小尺寸、高效率等特点。然而，传统的两电平、三电平和级联升压转换器无法满足要求。本文提出了一种新型的带有开关电容和开关电感的非隔离DC-DC变换器，该变换器可以获得高增益、宽输入电压范围、元件间的低电压应力和共地结构。本文分析了其工作原理、元件参数设计以及与其他高增益转换器的比较。此外，采用状态空间平均法和小信号建模方法获得变换器的动态模型。最后，仿真和实验结果验证了所提出拓扑的有效性。实验样机的输入电压范围为25V~80V，额定输出电压为200V，额定功率为100W。额定状态下最高效率为93.1%。所提出的转换器适用于燃料电池汽车。