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<p>Based on the magnetic coupling resonance principle, this paper analyzes a wireless power transfer (WPT) system suitable for cylindrical autonomous underwater vehicles (AUVs). The strong coupling characteristics of the arc-shaped coils at the transmitting and receiving ends ensure stable and efficient power transmission under arbitrary angular rotational misalignments and small-range axial misalignments. First, a comparative analysis of WPT systems with different numbers of receiving coil structures is conducted using ANSYS MAXWELL finite element simulation software. The results demonstrate that a dual-series receiving coil configuration maintains nearly constant self-inductance across 0-360° rotational misalignments and 0–20&#xa0;mm axial misalignments, with a coupling coefficient consistently above 0.535. The maximum fluctuation amplitude does not exceed 6.5%, showing the smallest variation range. Furthermore, the mutual inductance variation patterns obtained from simulations are applied to analyze the LCC-S compensation network, determining the system parameter range that enables zero-voltage soft switching (ZVS). Finally, a 55&#xa0;W experimental prototype is constructed for verification. Experimental results indicate that the WPT system maintains high output power under arbitrary rotational misalignments and small axial misalignments, with DC-DC efficiency sustained above 90% and maximum efficiency fluctuations below 1.9%.</p>

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Research on the Coupling Coefficient Fluctuation Characteristics of AUV Wireless Energy Transfer System Based on Receiving Coil Structure Optimization

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Jin Zhao,
  • Zuomin Sun,
  • Hao Chang,
  • Jianzhong Zu,
  • Wei Qian

摘要

Based on the magnetic coupling resonance principle, this paper analyzes a wireless power transfer (WPT) system suitable for cylindrical autonomous underwater vehicles (AUVs). The strong coupling characteristics of the arc-shaped coils at the transmitting and receiving ends ensure stable and efficient power transmission under arbitrary angular rotational misalignments and small-range axial misalignments. First, a comparative analysis of WPT systems with different numbers of receiving coil structures is conducted using ANSYS MAXWELL finite element simulation software. The results demonstrate that a dual-series receiving coil configuration maintains nearly constant self-inductance across 0-360° rotational misalignments and 0–20 mm axial misalignments, with a coupling coefficient consistently above 0.535. The maximum fluctuation amplitude does not exceed 6.5%, showing the smallest variation range. Furthermore, the mutual inductance variation patterns obtained from simulations are applied to analyze the LCC-S compensation network, determining the system parameter range that enables zero-voltage soft switching (ZVS). Finally, a 55 W experimental prototype is constructed for verification. Experimental results indicate that the WPT system maintains high output power under arbitrary rotational misalignments and small axial misalignments, with DC-DC efficiency sustained above 90% and maximum efficiency fluctuations below 1.9%.