Wireless power transmission (WPT) has gained considerable attention in recent years due to its convenience. Moreover, various research especially 3D coil structure studies in WPT are emerging through continuous research. However, most of these power sources are too volumetric to charge mobile devices, and the recently proposed 3D couple magnetic resonance system (CMRS) represents not only a lower power transmission efficiency (PTE) than the 2D system, but the PTE decreases sharply as the distance between the coils increases. To improve these drawbacks, this study proposes a novel approach to power mobile devices using a 3D spiral coil structure and a double transmitter coil system simultaneously. The mathematical model is presented, and three different coil structures are designed to evaluate the most power-efficient 3D coil structure. The proposed model is obtained and verified based on the simulation and experiment results. The result showed that when the distance between coils is the closest (8 mm), the PTE was 55.77%, which is improvement compared to that of the pervious 3D CMRS studies. Moreover, the PTE did not decrease sharply since our proposed system has the double resonance frequencies. Mathematical model, simulation, and experiment are provided to verify the feasibility of the proposed model.

无线电力传输（WPT）近年来由于其便利性而受到了广泛的关注。此外，通过持续研究，出现了各种研究，特别是WPT中的3D线圈结构研究。但是，这些电源中的大多数电源体积太大，无法为移动设备充电，因此，最近提出的3D耦合磁共振系统（CMRS）不仅比2D系统具有更低的功率传输效率（PTE），而且随着功率的增加PTE急剧下降。线圈之间的距离增加。为了改善这些缺点，本研究提出了一种新颖的方法，可同时使用3D螺旋线圈结构和双发射器线圈系统为移动设备供电。给出了数学模型，并设计了三种不同的线圈结构来评估最省电的3D线圈结构。基于仿真和实验结果，获得并验证了所提出的模型。结果表明，当线圈之间的距离最近（8毫米）时，PTE为55.77％，与以前的3D CMRS研究相比有所改善。此外，由于我们提出的系统具有双共振频率，因此PTE并没有急剧下降。提供数学模型，仿真和实验以验证所提出模型的可行性。