Asymmetric coaxial three‑coil wireless power transmission system optimization

Dongdong Zhang; Xuesong Li; Jie Yang; Xiang Li; Thomas Wu

Asymmetric coaxial three‑coil wireless power transmission system optimization

Vol. 23, No. 9, pp. 1436-1446, Sep. 2023

10.1007/s43236-023-00624-0

Electromagnetic field

wireless power transfer

performance optimization

Three coil

Abstract

With the rapid development of wireless power transmission (WPT) technology and the demand for a wide range of applications, the common two-coil system is becoming increasingly mature. However, the monotonous structure of two-coil systems limits their development. By incorporating relay coils, the distance of power transmission, efficiency, and electromagnetic field (EMF) leakage can be effectively improved. In this paper, the three-coil system is analyzed, and the relay coil parameters are optimized by an evolutionary algorithm. After that, based on the coil optimization, the compensation capacitance of the relay coil is analyzed and an analytical formula of the compensation capacitance of the optimized relay coil is obtained. The results show that the parameter-optimized system reduces current by 86.9%, increases efficiency by 10%, and suppresses EMF leakage by 18 dB. Meanwhile, the capacitor optimization further improves the transmission efficiency of the system.

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Cite this article

[IEEE Style]

D. Zhang, X. Li, J. Yang, X. Li, T. Wu, "Asymmetric coaxial three‑coil wireless power transmission system optimization," Journal of Power Electronics, vol. 23, no. 9, pp. 1436-1446, 2023. DOI: 10.1007/s43236-023-00624-0.

[ACM Style]

Dongdong Zhang, Xuesong Li, Jie Yang, Xiang Li, and Thomas Wu. 2023. Asymmetric coaxial three‑coil wireless power transmission system optimization. Journal of Power Electronics, 23, 9, (2023), 1436-1446. DOI: 10.1007/s43236-023-00624-0.