An analytical method to evaluate flying capacitor multilevel converters and hybrid switched-capacitor converters for large voltage conversion ratios
An analytical method to evaluate flying capacitor multilevel converters and hybrid switched-capacitor converters for large voltage conversion ratios
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评估大电压转换比的快速电容器多电平转换器和混合开关电容器转换器的分析方法
作者：
Y. Lei;Wen;R. Pilawa
本研究探讨多电平转换于大电压转换比之直流-直流应用。提出了一种定量的方法，可以作为一个指导比较和设计多电平拓扑的大转换比的应用。所提出的方法保持不同的转换器的导通损耗和开关损耗相同，并采用无源元件的体积作为单一的性能指标。作为例子，飞跨电容多电平转换器（FCMC）和混合开关电容（SC）转换器相比，传统的两级降压转换器，并分析显示，具有显着减少无源元件的大小。三个变换器原型实现，所提出的方法的基础上，实验验证的方法，以及展示多电平变换器的优点。
This work investigates the use of multilevel conversion in dc-dc applications that involve a large voltage conversion ratio. A quantitative method that can serve as a guide to compare and design multilevel topologies for large conversion ratio applications is presented. The proposed method keeps the conduction loss and switching loss the same across the different converters and employs the passive component volume as the single performance metric. As examples, flying capacitor multilevel converters (FCMC) and hybrid switched-capacitor (SC) converters are compared to conventional two-level buck converters, and are shown analytically to have significantly reduced passive component size. Three converter prototypes are implemented, based on the presented methodology to experimentally validate the method as well as demonstrate the advantages of multilevel converters.