High step-up boost converters with coupled inductor have attracted much attention in the fuel cell or photovoltaic grid-connected generation system, however, there are few literatures elaborated on the construction ideas and derivation methods of them. Accordingly, in order to obtain a clear roadmap on the derivation and inner connection of these converters, a comprehensive review and analysis are presented in this paper. First, the basic boost converter with coupled inductor is regarded as the basic topology, and its merits and demerits are analyzed in detail. Then, in order to address these demerits, various step-up techniques are introduced, such as the rectifier circuit, the active-clamped circuit, the multi-winding coupled inductor, and the voltage doubler rectifier; and numerous new topologies are continuously proposed by combinations and equivalent simplifications. In addition to a detailed synthesis of each topology, a comparative and quantitative analysis among some important converters is presented, and the optimal one is chosen to build a 250 W prototype. Finally, based on comparisons and analysis, the main characteristics and inner connections of these high step-up boost converters with coupled inductor are identified and clarified.

中文翻译：

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带耦合电感的高升压升压转换器的拓扑结构研究


在燃料电池或光伏并网发电系统中，带有耦合电感的高升压升压转换器引起了广泛关注，但对其构建思路和推导方法的阐述鲜有文献。因此，为了获得这些转换器的推导和内部连接的清晰路线图，本文进行了全面的回顾和分析。首先，将带有耦合电感的基本升压转换器视为基本拓扑，并详细分析其优缺点。然后，为了解决这些缺点，引入了各种升压技术，例如整流器电路、有源钳位电路、多绕组耦合电感器和倍压器整流器;并且通过组合和等效简化不断提出许多新拓扑。除了对每种拓扑进行详细综合外，还对一些重要的转换器进行了比较和定量分析，并选择了最佳转换器来构建 250 W 原型。最后，通过比较和分析，确定并阐明了这些带有耦合电感的高升压升压转换器的主要特性和内部连接。