磁耦合谐振式无线电能传输技术可以实现较远距离和较大功率的能量传输.由于它的便利性和安全性,它可以被应用到各种电子产品的无线充电技术中.但由于传输效率和传输距离等问题,它还不能实现商业化.针对这些问题,本文提出用超导中继线圈替换常规中继线圈的方案.超导线圈相对于常规中继线圈可以承载更大的电流密度,有更低的电阻和更高的品质因数(Q),因此它可以减少线圈自身的阻抗损耗,传输更多的能量.本文实验结果表明:在相同条件下超导线圈的品质因数是铜线圈的三倍左右;并证明用超导线圈作为中继线圈的磁耦合谐振式无线能量传输系统可以提高传输效率和增加传输距离.
The wireless power transfer (WPT) via strongly coupled magnetic resonance realizes large power transmission without any wires through further distance.Recently,the WPT system have started to be applied to the wireless charging for electrical products because of their advantages compared with the wired counterparts,such as convenience,safety,and fearless transmission of power.However,there are some troubles that prevent the WPT to realize commercialization,such as delivery distance and efficiency.To solve the problems,we proposed a scheme that replace conventional resonator coil with superconducting resonator coil.Superconducting coil can keep a larger current density,lower resistance and higher quality (Q),so can reduce the loss of coil impedance and deliver a larger quantity of electric energy.In this paper,the results that the superconducting coil resistance is about half of the copper coil and its quality factor is about three times of the copper coil;the system of wireless power transfer using superconducting resonator coil can achieve the improvement of transmission efficiency and extension of transfer distance.
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