基于高温超导线圈的共振式无线输电研究

Characteristics of magnetic coupling resonance wireless power transmission system by using high temperature superconducting coils

磁耦合共振式无线电能传输技术因其可以实现中距离和高效率的电能传输而被广泛重视。采用超导线圈代替常规铜线圈的无线输电系统,因临界温度下具有较小的损耗和较高的品质因数,可望大大提高系统的能量传输效率。分别构建了基于高温超导发射线圈的超导无线输电系统和基于铜发射线圈的常规无线输电系统,实验研究了超导线圈和铜线圈无线输电系统的能量传输效率与轴向距离和径向距离之间的关系。仿真和实验结果表明:相同条件下,无线输电系统使用超导发射线圈代替铜发射线圈可以有效提高系统能量传输效率,并改善系统在线圈未对准情况下效率的衰减。

The wireless power transfer(WPT)system using a magnetic coupling resonance has been studied extensively for its medium distance and high efficiency of power transfer.Since the resistance and AC loss of high temperature superconducting(HTS)coils are much lower than that of copper coils,it is an effective way using HTS coils with high Q-factor for WPT system to enhancethe power transfer efficiency.In the paper,we constructed a superconducting WPT system based on HTS transmitting coils and a conventional WPT system based on copper transmitting coils.The relationship between power transfer efficiency and axial distance or radial distance of WPT system was studied respectively.Both simulated and experimental results show that with the same conditions,the WPT system can enhance the system power transfer efficiency by using HTS coils instead of conventional copper coils,and thus improved the efficiency of the studied system in the case of coils misalignment.