Magnetic resonant wireless power transfer (MR-WPT) has become a significant method for powering the measurement units in landslide monitoring boreholes. This paper focuses on the effects of quality factor, coupling distance and load on the power transfer stability, sensitivity and performance of an MR-WPT system. Firstly, through a numerical model of an MR-WPT, the effect of quality factor and coupling distance on the output power, transfer efficiency and frequency splitting phenomenon of MR-WPT systems have been comparatively analyzed. The relationship between the load and the coupling distance region corresponding to optimal transfer performance has been studied. Results show that improving the quality factor of the coils is beneficial for the transfer performance and stability of WPT system. Furthermore, through the selection of the load, a coupling distance region with high transfer stability and an optimal tradeoff between power and efficiency can be obtained. Finally, the above theoretical simulation results have been verified by experimental results.

中文翻译：

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针对地下无线电力传输系统的距离区域选择高传输稳定性和最佳功率效率权衡

磁共振无线电力传输 (MR-WPT) 已成为为滑坡监测钻孔中的测量单元供电的重要方法。本文重点研究品质因数、耦合距离和负载对 MR-WPT 系统功率传输稳定性、灵敏度和性能的影响。首先，通过MR-WPT的数值模型，比较分析了品质因数和耦合距离对MR-WPT系统输出功率、传输效率和分频现象的影响。已经研究了对应于最佳传输性能的负载和耦合距离区域之间的关系。结果表明，提高线圈的品质因数有利于WPT系统的传输性能和稳定性。此外，通过负载的选择，可以获得具有高传输稳定性和功率和效率之间的最佳折衷的耦合距离区域。最后，通过实验结果验证了上述理论模拟结果。