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In this paper, a wireless power transfer (WPT) system for cylindrical AUVs is proposed based on the resonance principle, which can realize constant-efficiency power transfer to the AUVs in the case of rotational offset at any angle. This paper firstly analyzes and designs a kind of magnetic coupling device with strong coupling performance and can adapt to the special curvature of AUV based on MAXWELL simulation software, which has almost no change in self-inductance and the coupling coefficient can be always maintained above 0.538 with a fluctuation rate of less than 5% within the range of 0 to 360 degree rotational offset. Next, the LCC-S compensation network is analyzed and a set of resonance parameters are set to satisfy zero voltage switching (ZVS). An experimental prototype of about 120 W was finally constructed, and the experimental results show that the proposed wireless power transfer system is able to maintain high power resonance transmission under any angular rotational offsets, and the transfer and DC-DC efficiencies of the system can be maintained at about 91% and more than 80%, respectively, with a fluctuation rate of no more than 2%.

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Study of a Wireless Power Transfer System with Stabilized Efficiency Based on Coil Structure Improvement for AUVs

  • 会议论文

  • 发表日期：

    2025年

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

摘要

In this paper, a wireless power transfer (WPT) system for cylindrical AUVs is proposed based on the resonance principle, which can realize constant-efficiency power transfer to the AUVs in the case of rotational offset at any angle. This paper firstly analyzes and designs a kind of magnetic coupling device with strong coupling performance and can adapt to the special curvature of AUV based on MAXWELL simulation software, which has almost no change in self-inductance and the coupling coefficient can be always maintained above 0.538 with a fluctuation rate of less than 5% within the range of 0 to 360 degree rotational offset. Next, the LCC-S compensation network is analyzed and a set of resonance parameters are set to satisfy zero voltage switching (ZVS). An experimental prototype of about 120 W was finally constructed, and the experimental results show that the proposed wireless power transfer system is able to maintain high power resonance transmission under any angular rotational offsets, and the transfer and DC-DC efficiencies of the system can be maintained at about 91% and more than 80%, respectively, with a fluctuation rate of no more than 2%.