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  • CN 51-1277/U
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DONG Liang, SU Yuming, FAN Zhixun, SU Zhouhao. Design and Optimization of Coupling Mechanism for Wireless Energy Transmission of Hovering Unmanned Aerial Vehicles[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250261
Citation: DONG Liang, SU Yuming, FAN Zhixun, SU Zhouhao. Design and Optimization of Coupling Mechanism for Wireless Energy Transmission of Hovering Unmanned Aerial Vehicles[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250261

Design and Optimization of Coupling Mechanism for Wireless Energy Transmission of Hovering Unmanned Aerial Vehicles

doi: 10.3969/j.issn.0258-2724.20250261
  • Received Date: 09 May 2025
  • Rev Recd Date: 30 Sep 2025
  • Available Online: 30 Jun 2026
  • To address the problems of limited endurance of unmanned aerial vehicles and unstable power transmission caused by positional offset during hovering charging, a T-shaped asymmetric magnetic coupling mechanism based on demagnetizing field theory was proposed. Firstly, the magnetic field concentration ability was enhanced, and the demagnetization effect was suppressed by optimizing the magnetic circuit design, thereby improving the coupling coefficient; the influences of key parameters such as the upper side length, lower side length, and middle magnetic column height of the launch mechanism on the coupling performance were analyzed. Secondly, the optimal structural dimension combination was determined using a parametric sweep method. Finally, an experimental prototype was built to conduct performance testing. The research results indicate that the mutual inductance fluctuation rate of the structure is only 2.3% within a rotational offset range of ±20° and 4.1% within an axial offset range of ±20 mm, exhibiting excellent anti-offset characteristics; the mutual inductance fluctuation rate under rotational offset is 2.4%, and the output power fluctuation rate within an axial offset range of ±20 mm is 4.2%, which are basically consistent with the simulation results; under varying load conditions, the system can achieve constant current output, and the designed coupling mechanism has good robustness and stability under dynamic working conditions. The proposed T-shaped coupling mechanism has advantages such as compact structure, strong anti-offset ability, and stable output and is suitable for unmanned aerial vehicle application scenarios requiring continuous power supply, such as relay communication and power inspection.

     

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