In this paper, a wireless charging system and a human body model with various operating frequencies and output power are constructed to study the safe distance between the human body and the charging system when the electric vehicle is wirelessly charging. The models are simulated for electromagnetic fields and electromagnetic thermal effects. This paper mainly focuses on the induced electric field intensity of the human body and main organs during the static charging of electric vehicles under different operating conditions in a wireless charging system. The results are compared with the standards established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) to derive the minimum safe distance for electric vehicles charged wirelessly. The results show that when the system works at a frequency of 85 kHz with output power of 3.7 kW, 7.7 kW, 22 kW, 33 kW, 66 kW, and 150 kW, the minimum safe distance between the human body and the system is 0.5 m, 0.6 m, 0.7 m, 1.0 m, 1.2 m, and 1.7 m; when the system works at an output power of 66 kW with frequency of 85 kHz, 300 kHz, 500 kHz, and 700 kHz, the corresponding minimum safe distance is 1.2 m,0.9 m, 0.8 m, and 0.6 m. Moreover, the induced electric field intensity distribution of human organs at different power is also calculated, and the results show that the induced electric field intensity of the liver and kidney is higher than that of other organs. When the human body is at the minimum safe distance, the temperature changes caused by the electromagnetic heating effect of various organs are within the normal adjustment range of the human body, indicating the rationality of the minimum safe distance when the electric vehicle wireless charging system works under parameters of this paper. It provides a theoretical basis for the setting of the safe distance of the electric vehicle wireless charging system.

中文翻译：

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不同功率和频率电动汽车人体与无线充电系统安全距离研究

本文构建了无线充电系统和具有不同工作频率和输出功率的人体模型，研究电动汽车无线充电时人体与充电系统之间的安全距离。这些模型针对电磁场和电磁热效应进行了仿真。本文主要研究无线充电系统中电动汽车在不同工况下静电充电过程中人体和主要器官的感应电场强度。将结果与国际非电离辐射防护委员会 (ICNIRP) 制定的标准进行比较，得出电动汽车无线充电的最小安全距离。结果表明，当系统工作频率为85 kHz，输出功率为3.7 kW、7.7 kW、22 kW、33 kW、66 kW和150 kW时，人体与系统的最小安全距离为0.5米、0.6 米、0.7 米、1.0 米、1.2 米和 1.7 米；当系统工作在输出功率为66 kW，频率为85 kHz、300 kHz、500 kHz和700 kHz时，对应的最小安全距离为1.2 m、0.9 m、0.8 m和0.6 m。此外，还计算了不同功率下人体器官的感应电场强度分布，结果表明肝脏和肾脏的感应电场强度高于其他器官。当人体处于最小安全距离时，各器官的电磁加热效应引起的温度变化在人体正常调节范围内，说明电动汽车无线充电系统在本文参数下工作时最小安全距离的合理性。为电动汽车无线充电系统安全距离的设置提供了理论依据。