A novel high step-down interleaved converter with coupled inductor

2015 IEEE International Telecommunications Energy Conference (INTELEC) Pub Date : 2015-10-01 DOI:10.1109/INTLEC.2015.7572421

W. Martínez, J. Imaoka, Yuki Itoh, Masayoshi Yamamoto, K. Umetani

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引用次数: 9

Abstract

Nowadays, high power density has become essential in networking, telecommunications and computing applications. Additionally, the electronic equipment used in these applications requires a very-low voltage feeding even when its power supply has a much higher voltage rating. Therefore, high step-down converters with high power density performance are required for these applications. Consequently, a novel two-phase interleaved high step-down converter is proposed in order to fulfill the requirements of high power density and high step-down conversion ratio of these applications. The proposed converter addresses the objective by a particular coupled inductor where three windings are only installed in one core. As a result, the proposed converter can achieve higher step-down ratio than the conventional topologies by adding a winding and two switches to the interleaved two phase buck converter, besides the coupled-inductor configuration. In this paper, the novel topology is introduced and analyzed in order to find its conversion ratio operation. Then, the proposed topology is compared to conventional topologies and some improved high step-down converters recently proposed. Finally, the proposed converter is experimentally validated and the results revealed that the proposed converter shows higher step-down conversion ratio than the conventional buck converter with a further increment of 40% in the conversion ratio when the converter is operating at a duty cycle of 30% and ratio of turns of 2.

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一种具有耦合电感的新型高降压交错变换器

如今，高功率密度在网络、电信和计算应用中已经变得必不可少。此外，在这些应用中使用的电子设备需要一个非常低的电压馈电，即使其电源具有高得多的额定电压。因此，这些应用需要具有高功率密度性能的高降压变换器。为此，提出了一种新型的两相交错高降压变换器，以满足这些应用对高功率密度和高降压变换器的要求。所提出的转换器通过一个特定的耦合电感来解决这个问题，其中三个绕组仅安装在一个磁芯中。因此，除了耦合电感结构外，通过在交错两相降压变换器中增加一个绕组和两个开关，所提出的变换器可以实现比传统拓扑更高的降压比。本文对这种新型拓扑结构进行了介绍和分析，以找出其转换率运算。然后，将所提出的拓扑结构与传统拓扑结构以及最近提出的一些改进的高降压变换器进行了比较。最后，对该变换器进行了实验验证，结果表明，当变换器工作在占空比为30%、匝数比为2时，该变换器的降压变换器比传统降压变换器具有更高的降压变换器，比传统降压变换器提高了40%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2015 IEEE International Telecommunications Energy Conference (INTELEC)

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