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To reduce coil size for cost and volume reduction in electric vehicle wireless charging, this paper designs a three-phase bipolar coil with a 120° span by studying power transmission characteristics of different topologies and structures. A practical coupler was fabricated and used in an 11kW WPT system, achieving 96.34% efficiency from DC input to DC output.

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Comparison of Polyphase and Single-Phase Wireless Power Transfer Systems with Different Tuning Methods

  • 会议论文

  • 发表日期：

    2026年

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  • Jingshan Zheng,
  • Fan Zhai,
  • Xiaonan Dong,
  • Lingxiao Xue

摘要

To reduce coil size for cost and volume reduction in electric vehicle wireless charging, this paper designs a three-phase bipolar coil with a 120° span by studying power transmission characteristics of different topologies and structures. A practical coupler was fabricated and used in an 11kW WPT system, achieving 96.34% efficiency from DC input to DC output.