In this letter, we design a magnetically coupled resonant wireless power transfer (MCR-WPT) system on the conformal cylindrical surface based on the flexible printed circuit (FPC) coils. The coil has the advantages of small size, lightweight, and high bendability. We combine mathematics and simulations to explore the relationship between the self-inductance/mutual inductance of the flexible coil and the bending radius of the conformal cylindrical surface. Both theoretical and simulation results show that as the bending radius decreases linearly, the self-inductance and mutual inductance of the coil also decrease nonlinearly. In addition, as the bending radius decreases, the transmission efficiency (TE) decreases, and the resonant frequency shifts to a higher range. Finally, measured and simulated results agree well, which further validates the conclusions.

中文翻译：

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基于柔性 PCB 线圈的圆柱形磁耦合谐振无线电力传输系统

在本文中，我们基于柔性印刷电路 (FPC) 线圈在共形圆柱表面上设计了磁耦合谐振无线电力传输 (MCR-WPT) 系统。该线圈具有体积小、重量轻、弯曲性高等优点。我们结合数学和仿真来探索柔性线圈的自感/互感与共形圆柱面的弯曲半径之间的关系。理论和仿真结果均表明，随着弯曲半径线性减小，线圈的自感和互感也非线性减小。此外，随着弯曲半径的减小，传输效率（TE）降低，谐振频率向更高的范围移动。最后，实测和模拟结果吻合良好，