A high conversion ratio, high efficiency and miniaturized switching power supply converter is an important part of DC microgrid. Switched capacitors have been widely used in low-power voltage conversion applications, for small size, light weight, high efficiency, etc. Due to the structural characteristics of the switched capacitor topology, the transformation ratio of the circuit cannot be adjusted continuously. In response to this need, some control methods are proposed, most of which require more complicated control circuits or parameter design. A modular switched capacitor converter with adjustable output voltage is proposed in this paper. The topology can be modularized as required. More switched capacitor module provides higher output power and higher efficiency. More voltage regulating module provides wider output adjustment range. Its control method is simple and can be expanded to a high-power power supply as needed. The advantages of small size and high efficiency of switched capacitor topology are also retained. A 4 to 1 prototype with 12V output is built to verify the proposed topology. The peak efficiency of the prototype is 95.34% and the full load efficiency is 93.82%.

中文翻译：

---

直流微电网中输出电压可调的模块化开关电容变换器的分析与设计

高转换率、高效率、小型化的开关电源变流器是直流微电网的重要组成部分。开关电容已广泛应用于小功率电压转换应用中，具有体积小、重量轻、效率高等特点。由于开关电容拓扑结构的特点，电路的变比不能连续调整。针对这种需要，提出了一些控制方法，其中大部分需要更复杂的控制电路或参数设计。本文提出了一种输出电压可调的模块化开关电容变换器。拓扑可根据需要进行模块化。更多的开关电容模块提供更高的输出功率和更高的效率。更多的电压调节模块提供更宽的输出调节范围。其控制方式简单，可根据需要扩展为大功率电源。开关电容拓扑的体积小、效率高的优点也得以保留。构建了一个具有 12V 输出的 4 对 1 原型来验证所提出的拓扑。样机的峰值效率为95.34%，满载效率为93.82%。