Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Design and research of high misalignment tolerant magnetic couplers for dynamic wireless charging systems

  • Zhenjie Li (College of Computer and Control Engineering, Northeast Forestry University) ;
  • Xuezhi Yang (College of Computer and Control Engineering, Northeast Forestry University) ;
  • Jun Ma (College of Computer and Control Engineering, Northeast Forestry University) ;
  • Mingfei Ban (College of Computer and Control Engineering, Northeast Forestry University) ;
  • Yiqi Liu (College of Computer and Control Engineering, Northeast Forestry University)
  • Received : 2023.08.03
  • Accepted : 2023.11.20
  • Published : 2024.03.20
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Abstract

This paper proposes a main-auxiliary cooperative receiving coil (MA-coil) with a lower space occupation rate and a simple control based on the time-sharing working principle, which can effectively improve the anti-misalignment capability of a dynamic wireless charging (DWC) system. First, the structure and circuit topology of the MA-coil are designed. The two auxiliary coils (A-coil) are connected in reverse series and symmetrically placed on both sides of the main coil (M-coil). Second, the output performance of the MA-coil in the y-direction is calculated based on the time-sharing working principle. The A-coil works by itself and enhances the output power when side shift occurs. Third, the most suitable ratio of coil width wM and wA is determined. The anti-misalignment performance and the effective side shift range are compared through simulation between the MA-coil in this case and the square coil. Finally, an experimental prototype is built to verify the feasibility of the proposed structure, and experimental results obtained from the prototype are basically consistent with the theoretical analysis. The anti-misalignment capability of the MA-coil is more than 20% higher than that of the square coil.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant No. 52107001, in part by the China Postdoctoral Science Foundation under Grant No. 2022M710641, and in part by the Fundamental Research Funds for the Central Universities under Grant No. 2572021BF04.

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