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Aiming at the problem of misalignment of transceiver coils under wide detection range which reduces the power and efficiency of wireless energy transmission, a coil alignment system and method based on the magnetic field coupling law is proposed. The transmitting coil moves within the detection area and generates a coupled magnetic field with the magnetic conductive plate (MCP). By analyzing the relationship between the detection voltage and the misalignment distance in detection zone, a theoretical basis is provided for the autonomous and efficient alignment of the transceiver and transmitter in electric vehicles. Then the effectiveness of the proposed method is verified with simulation experiments. Within a range of 2m, the moving coil is aligned with different sizes of MCPs under severe misalignment, and the alignment errors are all no more than 5mm.

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Alignment Method of Removable Automotive Wireless Charging Coils Based on Magnetic Field Coupling Law in Large Range

  • 会议论文

  • 发表日期：

    2025年

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  • Shiqing Wang,
  • Chunlai Yu,
  • Zhikai Wang,
  • Haolun Ding,
  • Chengzhi Yu,
  • Jiaze Fei,
  • Zhanpeng Luo,
  • Chenxi Zhang,
  • Qinjin Zhang,
  • Yancheng Liu,
  • Siyuan Liu,
  • Haohao Guo

摘要

Aiming at the problem of misalignment of transceiver coils under wide detection range which reduces the power and efficiency of wireless energy transmission, a coil alignment system and method based on the magnetic field coupling law is proposed. The transmitting coil moves within the detection area and generates a coupled magnetic field with the magnetic conductive plate (MCP). By analyzing the relationship between the detection voltage and the misalignment distance in detection zone, a theoretical basis is provided for the autonomous and efficient alignment of the transceiver and transmitter in electric vehicles. Then the effectiveness of the proposed method is verified with simulation experiments. Within a range of 2m, the moving coil is aligned with different sizes of MCPs under severe misalignment, and the alignment errors are all no more than 5mm.