自谐振线圈耦合式电能无线传输的 最大效率分析与设计

谐振耦合电能无线传输是一种新的电能传输概念和方法，它能在中等距离范围内传递能量。该文基于空间隔离两线圈的互感耦合模型，从电路角度分析系统传输效率与线圈尺寸、距离等之间的关系，得到的传输效率表示式，进一步应用于系统最大传输效率的分析，以实现谐振耦合电能无线传输系统优化设计的目标。最后，设计制作一个谐振耦合电能无线传输装置，并设计多组不同参数的线圈进行比较实验，结果证明当空间隔离的两空心线圈达到谐振耦合时，两线圈之间传递能量最大，从而验证该文的理论研究。

Maximum Efficiency Analysis and Design of Self-resonance Coupling Coils for Wireless Power Transmission System

Self-resonance coupling is a new technology for wireless power transmission, which can transfer energy in middle distance. In this paper, the wireless transmission mechanism based on the coupling model of two spatial isolated coils was analyzed, and the relationship among efficiency, frequency, distance and coil sizes was researched. Further more, the maximum efficiency condition was obtained to optimize the design of self-resonance coupling system. Finally，a wireless power transmission prototype of resonant coupling was designed in this paper. And various coil groups were used to compare in this experiment. The result shows that the coils deliver the maximum energy when two hollow coils are in the state of resonance coupling, which quite verifies the theoretical research in this paper.