A Special Magnetic Coupler Structure for Three-Coil Wireless Power Transfer: Analysis, Design, and Experimental Verification

被引：18
|
作者：
Wang, Heshou [1 ,2 ]
Cheng, Ka Wai Eric [1 ,2 ]
Li, Xiaofei [2 ]
Hu, Jiefeng [3 ]
机构：
[1] Hong Kong Polytech Univ, Elect Vehicle Lab, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Power Elect Res Ctr, Dept Elect Engn, Hong Kong, Peoples R China
[3] Federat Univ, Sch Engn Informat Technol & Phys Sci, Mount Helen, Vic 3350, Australia
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2021年 / 57卷 / 11期
关键词：
Coupling mechanism structure; inductive power transfer (IPT); three-coil; wireless power transfer (WPT); TRANSFER SYSTEM; POSITION; WPT;
D O I：
10.1109/TMAG.2021.3111738
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：
In this article, a special magnetic coupler for three-coil wireless power transfer (WPT) is proposed to eliminate the mutual inductance between the source coil and the receiver coil, which can significantly improve the design freedom. Specifically, unipolar Q coil, mixed QDD coil, and bipolar DD coil are designed for the source coil, the transmitter coil (T-X), and the receiver coil (R-X), respectively. By making use of unipolar coils and bipolar coils, this structure magnetically decouples the receiver coil from the source coil. Meanwhile, under different lateral misalignment conditions, this new coupler facilitates maintaining high efficiency. A laboratory prototype has been constructed to validate the proposed structure, demonstrating that the proposed structure can realize inherent characteristics, enhance misalignment tolerance, and energy transfer. The potential applications are EV systems, but this design can be generalizable to other three-coil systems.
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页数：8
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