Matching network design for input impedance optimization of four‑coil magnetic resonance coupling wireless power transfer systems

Zhixuan Wang; Xiangdong Sun; Qi Zhang; Zechi Chen

Matching network design for input impedance optimization of four‑coil magnetic resonance coupling wireless power transfer systems

Vol. 22, No. 9, pp. 1627-1637, Sep. 2022

10.1007/s43236-022-00468-0

Input impedance

Magnetic resonance coupling

Matching network

wireless power transfer

Abstract

The input impedance of a four-coil magnetic resonance coupling wireless power transfer (MRC–WPT) system is in the form of parallel resonance at the optimal operating frequency. When the operating frequency deviates slightly, the system input impedance decreases rapidly. At this time, if a voltage source radio frequency power amplifier (RFPA) is used as the excitation power supply, the operating current is increased, which is not conducive to device safety. In this paper, a matching network is designed and inserted between the power supply and the MRC–WPT circuit to convert the input impedance into a series resonant form, so the MRC–WPT circuit can be safely connected to the voltage source RFPA. Finally, an experimental prototype is built to verify the applicability of the proposed matching network.

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Cite this article

[IEEE Style]

Z. Wang, X. Sun, Q. Zhang, Z. Chen, "Matching network design for input impedance optimization of four‑coil magnetic resonance coupling wireless power transfer systems," Journal of Power Electronics, vol. 22, no. 9, pp. 1627-1637, 2022. DOI: 10.1007/s43236-022-00468-0.

[ACM Style]

Zhixuan Wang, Xiangdong Sun, Qi Zhang, and Zechi Chen. 2022. Matching network design for input impedance optimization of four‑coil magnetic resonance coupling wireless power transfer systems. Journal of Power Electronics, 22, 9, (2022), 1627-1637. DOI: 10.1007/s43236-022-00468-0.