Numerical dosimetry with regards to a resonance-based wireless power transfer (RBWPT) system for charging electric vehicles (EVs) has been conducted. The RBWPT system operating at 13.56 MHz frequency with a transferred power of 5.3 kW is placed below the center of the vehicle body. Specific absorption rate (SAR) in anatomically-based human models Duke and Ella with and without a medical implant is evaluated using four exposure scenarios (i.e., Duke and Ella models sitting in the EV without an implant, the Ella model: With an InterStim neurostimulator implant, having a prosthetic hip implant, or having a cardiac pacemaker implant). The results indicate that change in radio frequency (RF) energy absorption occurs when conductive implants are placed in the near field of an RF source. Enhancement of the SAR close to the implants is predicted. The peak averaged SAR over 10 g of tissues exceeds the standard limiting value posed by international guidelines except for the leadless pacemaker, which is in compliance with the prescribed limits. However, the temperature increase never exceeds the localized temperature rise limit of 2 °C. Compliance with the recommended limits of SAR in the worst-case exposure scenario is likely to limit the transferred power.

中文翻译：

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使用医疗植入物评估人体对电动汽车无线电力传输系统电磁场的暴露程度

已经对用于为电动汽车 (EV) 充电的基于谐振的无线电力传输 (RBWPT) 系统进行了数值剂量测定。RBWPT 系统以 13.56 MHz 频率运行，传输功率为 5.3 kW，位于车身中心下方。使用四种暴露场景（即，Duke 和 Ella 模型坐在没有植入物的 EV 中，Ella 模型：使用 InterStim 神经刺激器）评估基于解剖学的人体模型 Duke 和 Ella 的比吸收率 (SAR)植入物、假体髋关节植入物或心脏起搏器植入物）。结果表明，当导电植入物放置在射频源的近场中时，射频 (RF) 能量吸收会发生变化。预计植入物附近的 SAR 会增强。超过 10 g 组织的峰值平均 SAR 超过了国际指南规定的标准限值，但符合规定限值的无铅起搏器除外。然而，温升绝不会超过 2 °C 的局部温升极限。在最坏的暴露情况下遵守建议的 SAR 限值可能会限制传输的功率。