In this study, the analysis and design of a coupled-inductor (CL)-based ultra-high step-up single-switch DC–DC converter are presented. With the aid of the CL and voltage multiplier cell, the suggested topology can obtain ultra-high-voltage gain without a large turn ratio and extreme duty cycle. A passive clamp circuit is utilised in the structure of the introduced converter for not only alleviating voltage spike on the main switch effectively but also recycle the leakage inductance energy. So low-voltage rating and low on-state resistance metal oxide semiconductor field-effect transistor is allowed to increase efficiency and lower the conduction losses. The input current ripple of the suggested topology is very low due to connecting an inductor to the suggested structure input section, which is very friendly and desirable to the photovoltaic and fuel cell applications. The suggested converter steady-state analysis, operation principle, theoretical efficiency analysis, and design procedure are described comprehensively in this study. Furthermore, the suggested converter superiority is illustrated over various alike recently introduced the most important DC–DC structures in the comparison study. Finally, a laboratory prototype is fabricated with a 225 W output power to confirm the theoretical analysis of the introduced converter.

中文翻译：

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具有低输入电流纹波和超高压转换比的新型新型高升压DC-DC转换器的设计，分析和实现

在这项研究中，提出了一种基于耦合电感（CL）的超高升压单开关DC-DC转换器的分析和设计。借助CL和电压倍增单元，所建议的拓扑结构无需超大匝数比和极高的占空比即可获得超高压增益。在所引入的转换器的结构中采用了无源钳位电路，不仅有效地减轻了主开关上的电压尖峰，而且还循环了漏感能量。因此，允许使用低额定电压和低导通电阻的金属氧化物半导体场效应晶体管来提高效率并降低传导损耗。由于将电感器连接到建议的结构输入部分，因此建议的拓扑的输入电流纹波非常低，对于光伏和燃料电池应用而言，这是非常友好且理想的。本文对建议的转换器稳态分析，工作原理，理论效率分析和设计程序进行了全面描述。此外，相比于最近在比较研究中介绍的最重要的DC-DC结构，已说明了建议的转换器优越性。最后，制造了一个具有225 W输出功率的实验室原型，以确认所引入转换器的理论分析。在比较研究中，所建议的转换器优势优于最近介绍的最重要的DC-DC结构。最后，制造了一个具有225 W输出功率的实验室原型，以确认所引入转换器的理论分析。在比较研究中，所建议的转换器优势优于最近介绍的最重要的DC-DC结构。最后，制造了一个具有225 W输出功率的实验室原型，以确认所引入转换器的理论分析。