Three-Phase Interleaved Bidirectional LLC Resonant Converter with Vertically Integrated Magnetics

被引：3

作者：

Bao, Junyang ^{[1
]}

Li, Yong ^{[1
]}

Duan, Shanxu ^{[1
]}

Liu, Bangyin ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Technol, Wuhan, Peoples R China

来源：

2024 IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION, APEC | 2024年

关键词：

bidirectional DC/DC converter; LLC resonant converter; magnetic integration; interleaving; TRANSFORMER; DESIGN;

D O I：

10.1109/APEC48139.2024.10509265

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Bidirectional LLC resonant converter is becoming widely applied in energy storage systems because of its high efficiency, high power density, and low EMI characteristics. To extend output power and reduce the output current ripple, the common approach is to parallel multiple-phase interleaved converter, which is proved to have higher efficiency and power density. This paper proposed a three-phase interleaved bidirectional LLC resonant converter with vertically integrated magnetics. Transformers and inductors are integrated by a shared magnetic plate to reduce the volume of magnetics. Flux cancellation in both forward and backward operation modes is achieved, resulting in smaller core loss and improved converter efficiency. The simplified reluctance model is presented, and the impact of zerosequence magnetic flux and current is analyzed. The optimal design of magnetics is presented, and a 500 kHz 400 V/ 52V 3.5 kW prototype is implemented, with peak efficiency of 98.44% and power density of 270 W/in(3).

引用

页码：486 / 492

页数：7

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