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This paper utilizes an LC inverter circuit with a single transistor as a high-frequency inverter to apply the wireless power transfer system in small and medium-sized UAVs. It replaces full-bridge and half-bridge inverters with smaller and lighter single-tube LC inverters. It avoids bridge arm pass-through and improves the stability of the circuit. At the same time, the coupling coil vice-side compensation network could realize CC/CV (Constant Current/Constant Voltage) output switching through power switch converting. It solves the problem of CC overcharging or CV undercharging in the battery charging process. Secondly, the proposed switching method has a continuous switching process, low switching voltage stress, and zero-voltage turn-on for CC/CV outputs. Finally, an experimental platform with an output of 100W at 25V input is built to verify the theoretical analysis. The CC/CV characteristics of this scheme are verified, and the peak output efficiency of the system is maintained at about 92% when CC/CV switching is changed.

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Design of Wireless Power Transfer with Single Tube LC Inverter System of High-Power Density and High Efficiency for Small and Medium-Sized UAVS

  • 会议论文

  • 发表日期：

    2025年

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  • Lei Yang,
  • Dengrui Xing,
  • Xinze Chen,
  • Liye Tian,
  • Zhixue Bu,
  • Jiahua Sun,
  • Yaopeng Zhao,
  • Haibing Wen

摘要

This paper utilizes an LC inverter circuit with a single transistor as a high-frequency inverter to apply the wireless power transfer system in small and medium-sized UAVs. It replaces full-bridge and half-bridge inverters with smaller and lighter single-tube LC inverters. It avoids bridge arm pass-through and improves the stability of the circuit. At the same time, the coupling coil vice-side compensation network could realize CC/CV (Constant Current/Constant Voltage) output switching through power switch converting. It solves the problem of CC overcharging or CV undercharging in the battery charging process. Secondly, the proposed switching method has a continuous switching process, low switching voltage stress, and zero-voltage turn-on for CC/CV outputs. Finally, an experimental platform with an output of 100W at 25V input is built to verify the theoretical analysis. The CC/CV characteristics of this scheme are verified, and the peak output efficiency of the system is maintained at about 92% when CC/CV switching is changed.