电动汽车动态无线充电系统弯道互感跌落研究及改进
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1.武汉理工大学;2.武汉理工大学 机电工程学院

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Research and improvement of mutual inductance drop around corner of electric vehicle dynamic wireless charging system
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School of Mechanical and Electronic Engineering,Wuhan University of Technology

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    摘要:

    目前电动汽车动态无线充电系统的发射线圈多采用分段导轨结构,以实现接力式的动态无线充电,但系统在导轨切换处存在较大的互感跌落问题,这一问题在弯道处更加突出,导致系统传输效率降低。本文建立了弯道动态无线充电模型,通过理论分析推导出了原副线圈互感与偏转角度的关系,并提出了一种弯道处导轨发射线圈的改进结构,搭建了基于共振磁耦合的弯道动态无线充电平台。仿真与实验表明,相较于传统的弯道处发射线圈导轨结构,采用改进型的导轨发射线圈结构的无线充电系统,其原副线圈互感跌落现象显著减小,且在偏移角度最大处系统传输效率提升了8%-9%,验证了改进线圈结构的有效性。

    Abstract:

    At present, the transmitting coil of the dynamic wireless charging system of electric vehicles mostly adopts the segmented guide rail structure to realize the relay dynamic wireless charging. However, the mutual inductance drop problem will occur at the switching of the guide rail, which is more prominent at the corner, resulting in the reduction of the transmission efficiency of the system. This paper established the curve dynamic wireless charging model, deduced the relationship between the mutual inductance of the original secondary coil and the deflection angle through theoretical analysis, proposed an improved structure of the guideway transmitting coil at the curve, and built the curve dynamic wireless charging platform based on resonance magnetic coupling. Simulation and experiment show that compared with the traditional transmitting coil guide structure at the bend, the mutual inductance drop of the original secondary coil is significantly reduced in the wireless charging system with the improved guideway transmitting coil structure, and the system transmission efficiency is improved by 8%-9% at the maximum offset Angle, which verifies the effectiveness of the improved coil structure.

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  • 收稿日期:2021-10-10
  • 最后修改日期:2021-11-24
  • 录用日期:2021-12-20
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