Design of Magnetic Structure for Zero Input Current Ripple in DC-DC Converter with Multi-winding Coupled Inductor

2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) Pub Date : 2023-06-09 DOI:10.1109/PEDG56097.2023.10215237

H. Shen, S. Pan, Jinwu Gong, Qiyuan Hu, Zisen Lin, X. Zha

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Abstract

Aiming at application scenarios that require low current ripple, this article proposes a two-phase integrated magnetic core structure to achieve zero current ripple in coupled inductor by controlling the coupling parameters in DC-DC converter. The proposed structure integrates all windings into a pair of magnetic cores so as to improve the utilization rate of the magnetic core. Moreover, the coupling parameter design problem is transformed into a magneto resistive design problem, which is easy to implement in engineering, and the ripple of the two-phase inductor current and input current is attenuated. Then, through the negative coupling characteristics between the phases, the flux in the magnetic core structure is cancelled partially, which reduces the magnetic loss and improves the efficiency of the converter. Finally, the correctness of the theoretical analysis and the feasibility of the proposed topology and magnetic core structure are verified by simulation and experimental results.

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多绕组耦合电感DC-DC变换器零输入电流纹波磁结构设计

针对需要低电流纹波的应用场景，本文提出了一种两相集成磁芯结构，通过控制DC-DC变换器的耦合参数，实现耦合电感电流零纹波。本发明的结构将所有绕组集成为一对磁芯，从而提高了磁芯的利用率。此外，将耦合参数设计问题转化为磁阻设计问题，便于工程实现，并对两相电感电流和输入电流的纹波进行了衰减。然后，通过相间的负耦合特性，部分抵消磁芯结构中的磁通，降低了磁损，提高了变换器的效率。最后，通过仿真和实验结果验证了理论分析的正确性以及所提出的拓扑结构和磁芯结构的可行性。

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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2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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