基于磁场谐振耦合的无线电力传输发射及接收装置的研究

Research on transmitter and receiver of wireless power transmission based on magnetic resonance coupling

发射、接收装置是实现无线能量传输的核心部分。本文从磁场的角度对发射与接收天线的转换效率进行分析,得到了天线的参数与效率之间的关系,从而可以有目的性地对天线的参数进行选择,以达到最优效果的传输。最后搭建实验平台,改变天线的参数,通过实验验证理论的分析。理论及实验表明发射、接收线圈的匝数及线圈半径的大小对传输效率有重要的影响。

Self-resonance coupling is a new technology for wireless power transmission, which can transfer energy in middle distance. Transmitters and receivers are core parts to achieve wireless power transmission. An antenna has a part that amplifies a flux to make the antenna have a larger effective size than its actual size. This paper ana- lyses the conversion efficiency between transmitting and receiving antenna from the point of magnetic field, getting the relation between the parameters of antennae and efficiency. It is helpful to choose the parameters of antennae with the purpose of achieving optimal result. At last, a wireless power transmission prototype based on magnetic resonance coupling was designed in this paper for verifying the theoretical analysis in experiments. Theoretical and experimental results show that the coil turns and the size of the coil radius of the antennae have an important influence on the efficiency.