High voltage generation, is one of the main applications of the Cockcroft-Walton voltage multiplier (CWVM), however recently this structure is investigated to be used for high step-up DC-DC applications. This paper discusses dynamic behaviour and small-signal modelling of a CWVM based DC-DC converter and investigates how switching strategy can affect the dynamic performance of the converter. This study firstly presents, a new switching method, the steady-state relations are derived and compared to the conventional switching strategy, which shows that the proposed method equilibrates the voltage and current stress of the switches and decreases the current ripple of the input inductor. Then, the converter is dynamically modelled and analyzed using the pole-zero map. The analysis shows that the proposed switching strategy improves the dynamic behaviour of the converter. The effect of the passive elements on dynamic performance is also discussed. Experimental results are presented for a 160 W prototype to validate the evaluated performance and the dynamic analysis.

中文翻译：

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电流馈送 Cockcroft-Walton 电压倍增器的开关策略开发、动态模型和小信号分析


高电压生成是 Cockcroft-Walton 电压倍增器 (CWVM) 的主要应用之一，但最近这种结构被研究用于高升压 DC-DC 应用。本文讨论了基于 CWVM 的 DC-DC 转换器的动态行为和小信号建模，并研究了开关策略如何影响转换器的动态性能。本研究首先提出了一种新的开关方法，推导了稳态关系并与传统的开关策略进行比较，结果表明该方法平衡了开关的电压和电流应力，并降低了输入电感器的电流纹波。然后，使用零极点图对转换器进行动态建模和分析。分析表明，所提出的开关策略改善了转换器的动态行为。还讨论了无源元件对动态性能的影响。给出了 160 W 原型的实验结果，以验证评估的性能和动态分析。