Design and research of high misalignment tolerant magnetic couplers for dynamic wireless charging systems

Zhenjie Li; Xuezhi Yang; Jun Ma; Mingfei Ban; Yiqi Liu

Design and research of high misalignment tolerant magnetic couplers for dynamic wireless charging systems

Vol. 24, No. 3, pp. 492-502, Mar. 2024

10.1007/s43236-023-00739-4

Dynamic wireless charging

Magnetic coupler

wireless power transfer

performance optimization

High antimisalignment ability

Abstract

This paper proposes a main-auxiliary cooperative receiving coil (MA-coil) with a lower space occupation rate and a simple control based on the time-sharing working principle, which can effectively improve the anti-misalignment capability of a dynamic wireless charging (DWC) system. First, the structure and circuit topology of the MA-coil are designed. The two auxiliary coils (A-coil) are connected in reverse series and symmetrically placed on both sides of the main coil (M-coil). Second, the output performance of the MA-coil in the y-direction is calculated based on the time-sharing working principle. The A-coil works by itself and enhances the output power when side shift occurs. Third, the most suitable ratio of coil width w M and w A is determined. The anti-misalignment performance and the effective side shift range are compared through simulation between the MA-coil in this case and the square coil. Finally, an experimental prototype is built to verify the feasibility of the proposed structure, and experimental results obtained from the prototype are basically consistent with the theoretical analysis. The anti-misalignment capability of the MA-coil is more than 20% higher than that of the square coil.

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Cite this article

[IEEE Style]

Z. Li, X. Yang, J. Ma, M. Ban, Y. Liu, "Design and research of high misalignment tolerant magnetic couplers for dynamic wireless charging systems," Journal of Power Electronics, vol. 24, no. 3, pp. 492-502, 2024. DOI: 10.1007/s43236-023-00739-4.

[ACM Style]

Zhenjie Li, Xuezhi Yang, Jun Ma, Mingfei Ban, and Yiqi Liu. 2024. Design and research of high misalignment tolerant magnetic couplers for dynamic wireless charging systems. Journal of Power Electronics, 24, 3, (2024), 492-502. DOI: 10.1007/s43236-023-00739-4.