Analysis and comparison of high step-up converters based on Greinacher voltage multiplier cells,International Journal of Circuit Theory and Applications

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Analysis and comparison of high step-up converters based on Greinacher voltage multiplier cells
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2022-09-05 , DOI: 10.1002/cta.3436
Bernardo Andres ₁ , Tiago M. K. Faistel ₁ , António M. S. S. Andrade ₁ , Leandro Roggia ₁ , Luciano Schuch ₁

Affiliation

High step-up converters are often used in photovoltaic applications due to low voltage of photovoltaic modules. In this paper, two new topologies, obtained with the insertion of voltage multiplier cells on secondary side of isolated SEPIC, are proposed. They have the advantages of continuous input current, isolation, high efficiency, and high voltage gain, being suitable for low power applications. To perform this study, theoretical and comparative analyses are accomplished. They include a description of each converter, tables, and curves with relevant information, such as voltage gain, total voltage stress, and total current stress. Moreover, the identification of the use of coupled inductor or transformer based on the analysis of DC magnetizing current is presented. Theoretical analysis and experimental results on 37.4/400 V, 50 kHz, and 200 W prototypes of selected isolated SEPIC with voltage doubler cell and voltage quadrupler cell are presented to validate the proposed topology and concept, where the maximum efficiency obtained for the converter with doubler cell is 96.85%, while for the converter with quadrupler cell is 97.75%.

中文翻译：

基于格莱纳赫倍压单元的高升压变换器的分析与比较

由于光伏组件的电压较低，光伏应用中经常使用高升压转换器。在本文中，提出了两种新的拓扑结构，通过在隔离式 SEPIC 的次级侧插入电压倍增器单元获得。它们具有连续输入电流、隔离、高效率和高电压增益等优点，适用于低功率应用。为了进行这项研究，完成了理论和比较分析。它们包括每个转换器的描述、表格和曲线以及相关信息，例如电压增益、总电压应力和总电流应力。此外，还提出了基于直流磁化电流分析的耦合电感器或变压器的使用识别。37.4/400 V、50 kHz 的理论分析和实验结果，

更新日期：2022-09-05

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