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Electromagnetic metamaterials (EM) have great potential for improving the efficiency of wireless power transfer (WPT) systems. However, the design and development of low-frequency EM for WPT working at kHz frequencies are challenging due to the limitations of wavelength and loss. This paper proposes a new EM structure suitable for WPT system at kHz frequencies. The simulation analysis of the magnetic field focusing characteristics in the WPT system with the proposed EM is conducted. The low-frequency EM model is proposed based on the distribution of magnetic field lines. The parameters of the plane spiral coils and the dual LCC compensation circuits for the WPT system are designed. An experimental platform for WPT with the low-frequency EM is built. The experimental results verify the rationality and feasibility of the low-frequency EM designed in this paper, which is expected to provide an effective approach for improving the transfer efficiency of WPT systems at kHz frequencies.

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Research on Low-Frequency Metamaterials Enhancing Wireless Power Transfer Performance

  • 会议论文

  • 发表日期：

    2025年

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  • Hu Jingtao,
  • Zhang Chao,
  • Liu Guoqiang

摘要

Electromagnetic metamaterials (EM) have great potential for improving the efficiency of wireless power transfer (WPT) systems. However, the design and development of low-frequency EM for WPT working at kHz frequencies are challenging due to the limitations of wavelength and loss. This paper proposes a new EM structure suitable for WPT system at kHz frequencies. The simulation analysis of the magnetic field focusing characteristics in the WPT system with the proposed EM is conducted. The low-frequency EM model is proposed based on the distribution of magnetic field lines. The parameters of the plane spiral coils and the dual LCC compensation circuits for the WPT system are designed. An experimental platform for WPT with the low-frequency EM is built. The experimental results verify the rationality and feasibility of the low-frequency EM designed in this paper, which is expected to provide an effective approach for improving the transfer efficiency of WPT systems at kHz frequencies.