新型电磁耦合谐振式无线电能传输系统建模与实验验证

摘要

Aiming at the problems of frequency response, transmission capacity and efficiency optimization in novel EM field resonant coupling power transmission system, a mathematical equivalent model is proposed based on coupled mode theory. By introduction of mode coupling factor and quality factor, the influences of different physical parameters on system performance are discussed to obtain best working conditions. Moreover active power on the load and system transmission efficiency as a function of distance between oscillators is deduced. Then, planar disc resonant coils are proposed taking into account shortcomings of coaxial helical coils such as large volume and instability of resonant points. It is shown by results that blindness for designing actual system is reduced and overall efficiency capacity is improved.%本文针对新型电磁耦合谐振式无接触电能传输系统的频率响应、传输能力和效率优化问题，通过耦合模理论建立了详细准确的数学等效模型。通过模式耦合因数与品质因数的引入，讨论了不同物理参数对系统性能的影响，并得出了负载的最佳工作条件。结果给出了线圈间距与负载有功功率及系统传输效率之间的关系。实验方面，考虑到同轴螺旋线圈体积过大、谐振点不稳定等缺点，设计了平面盘式谐振线圈。结果表明，根据本文结论，可以大幅减少实际系统阻抗匹配设计的盲目性，有效地提高系统的功率传输能力与整体效率。