适应需求侧管理的高效中距离磁共振式电动汽车无线充电线圈优化设计

提出一种适应需求侧管理的高效中距离磁共振式电动汽车无线充电线圈优化设计方法。在分析磁共振式无线充电系统工作原理的基础上,首先对充电耦合线圈结构进行优化设计,选取多股漆包线并联而成的导线绕制方形耦合线圈,并通过增加线圈层数提升系统传输效率;其次通过实验对比验证,优化选取系统工作频率,最优工作频率为55kHz时,系统传输效率可达85%以上;最后分析线圈相对位置与传输效率之间的关系曲线,优化设计后的系统线圈相对位置为18cm时,最高传输效率为85%。实验结果表明经过优化设计耦合线圈系统传输效率明显得到提升。

Optimization Design of Efficient Middle-Distance Magnetic-Resonance Wireless Charge Coil Suitable for Electric Vehicle Charging

This paper focuses on an optimization design method of efficient middle-distance magnetic-resonance wireless charge coil suitable for electrical vehicle charging. First, optimization design is carried out for the structure of charge coil, based on research of magnetic-resonance wireless charging principle, and a square coil is enwound with multi-stranded wires connected in parallel, with multilayer coil added to improve the transmission efficiency; then, the optimal working frequency of circuit is optimized and selected through experimental comparison validation. The transmission efficiency reaches over 85% when the optimal working frequency is 55 kHz; finally, the relation curve between the relative displacement of coils and the transmission efficiency is analyzed. The maximum transmission efficiency is 85% when the relative displacement is 18 cm. The experimental result shows that the optimized charging coil raises the transmission efficiency obviously.