This article proposes and implements a continuously adjustable capacitor for multiple-pickup wireless power transfer (WPT), aiming to enhance the energy security performance under single-power-induced energy field. With the accelerated development and commercialization of WPT, the energy security issue shows the increasing significance for multiple-pickup WPT systems, where the induced open radial electromagnetic field facilitates all involved pickup coils to access the wirelessly transferred energy. If utilizing no appropriate protection strategy, the energy privacy is inevitably jeopardized, especially for the single-power-induced energy field where the auxiliary technique, such as the radio-frequency identification, cannot identify the multiple pickups. Accordingly, this article proposes a continuously adjustable capacitor that enhances the security/transmission performance for multiple-pickup WPT systems. Differing from impedance adjusting schemes reported in previous studies, the continuously adjustable capacitor can continuously adjust the impedance to match the encrypted switching frequency dynamically and continuously. In such ways, it can effectively enhance the flexibility of the WPT hardware platform for the cryptographic algorithm, thus significantly reduce the possibility of power being hacked. Finally, the simulated and experimental results are provided to verify the feasibility of the proposed continuously adjustable capacitor for the energy encryption of multiple-pickup WPT systems.

中文翻译：

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用于单电源感应能量场下多拾取器无线功率传输的连续可调电容器


本文提出并实现了一种用于多拾取无线功率传输（WPT）的连续可调电容器，旨在增强单功率感应能量场下的能源安全性能。随着WPT的加速发展和商业化，能源安全问题对于多拾波器WPT系统越来越重要，其中感应的开放径向电磁场有利于所有涉及的拾波线圈访问无线传输的能量。如果不采取适当的保护策略，能量隐私将不可避免地受到危害，特别是对于单电源感应的能量场，射频识别等辅助技术无法识别多个拾音器。因此，本文提出了一种连续可调电容器，可增强多拾取器 WPT 系统的安全/传输性能。与之前研究中报道的阻抗调整方案不同，连续可调电容器可以连续地动态地、连续地调整阻抗以匹配加密的开关频率。通过这种方式，可以有效增强WPT硬件平台对密码算法的灵活性，从而显着降低电源被黑客攻击的可能性。最后，提供仿真和实验结果来验证所提出的连续可调电容器用于多拾波器WPT系统能量加密的可行性。