磁耦合谐振式WPT系统传输特性影响因素研究

文章对磁耦合谐振式WPT系统传输特性的影响因素开展了研究与分析,分析了基于SS结构的磁耦合谐振式WPT系统的传输效率模型,基于此模型研究了品质因数对系统传输特性的影响;分别研究了趋肤效应与线圈结构对传输特性的影响,并根据趋肤深度公式分析了多芯情况下的线圈品质因数计算公式,研究结果表明:传输效率与品质因数成正比,且品质因数随着导线芯数的增加而增加;圆柱型螺线管构型具有传输距离远与传输方向性好等优点,更适用于磁耦合谐振式WPT。最后搭建了实验平台,验证了理论分析的正确性。

Study on Influencing Factors of Transmission Characteristics of Magnetic Resonance Coupling WPT System

The influencing factors of transmission characteristics of the magnetic resonance coupling WPT system are studied and analyzed in this paper. Firstly, the transmission efficiency model of the magnetic resonance coupling WPT system based on SS structure is analyzed. Based on this model, the effect of quality factor on the transmission characteristics of the system is studied. Then the effect of skin effect and coil structure on transmission characteristics is studied, and the calculation formula of coil quality factor under multi-core condition is analyzed according to skin depth formula. The results show that the transmission efficiency is directly proportional to the quality factor, and the quality factor increases with the increase of wire core number. The cylindrical solenoid configuration has the advantages of long transmission distance and good directivity of transmission, which is more suitable for WPT. Finally, the experimental platform is set up to verify the correctness of the theoretical analysis.