To commercialize wirelesselectric vehicle charging (WEVC), three critical issues must be resolved: communication between the vehicle assembly (VA) and the ground assembly (GA), metal object detection (MOD) on the GA coil, and position detection (PD) of the VA. This paper proposes a comprehensive system that integrates MOD and PD with VA-GA near-field communication (NFC). A common high-frequency aided carrier is used not only for NFC, but also for MOD and PD. In addition, an array of dual-purpose detection coils is proposed as a sensor for MOD and PD. As a result, the three functions listed above share numerous components and circuits, greatly simplifying the system structure. Furthermore, because the high-frequency aided carrier can operate with or without a power carrier, the preceding three functions are independent of system power status. The proposed method has been validated using a 3.3 kW WEVC prototype operating at 85 kHz. The experimental results show that the proposed system is capable of performing both online and offline NFC, MOD, and PD with high sensitivity while having no impact on wireless charging efficiency.

中文翻译：

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金属物体和车辆位置检测与无线 EV 充电的近场通信集成

要将无线电动汽车充电（WEVC）商业化，必须解决三个关键问题：车辆总成（VA）与地面总成（GA）之间的通信、GA线圈上的金属物体检测（MOD）和位置检测（PD）。弗吉尼亚州。本文提出了一个将 MOD 和 PD 与 VA-GA 近场通信 (NFC) 相结合的综合系统。常见的高频辅助载波不仅用于NFC，还用于MOD和PD。此外，提出了一个两用检测线圈阵列作为 MOD 和 PD 的传感器。这样一来，上述三个功能共用了众多的元器件和电路，大大简化了系统结构。此外，由于高频辅助载波可以在有或没有电力载波的情况下运行，因此上述三个功能与系统电源状态无关。所提出的方法已经使用在 85 kHz 下运行的 3.3 kW WEVC 原型进行了验证。实验结果表明，所提出的系统能够以高灵敏度执行在线和离线NFC、MOD和PD，同时对无线充电效率没有影响。