The expected imminent widespread use of electromobility in transport systems draws attention to the possible effects of human exposure to magnetic fields generated inside electric vehicles and during their recharge. The current trend is to increase the capacity of the battery inside the vehicles to extend the available driving range and to increase the power of recharging columns to reduce the time required for a full recharge. This leads to higher currents and potentially stronger magnetic fields. The Interoperability Center of the Joint Research Center started an experimental activity focused on the assessment of low-frequency magnetic fields emitted by five fast-charging devices available on the market in recharge and standby conditions. The aim of this study was to contribute to the development of a standard measurement procedure for the assessment of magnetic fields emitted by direct current charging columns. The spectrum and amplitudes of the magnetic field, as well as exposure indices according to guidelines for the general public and occupational exposure, were recorded by means of a magnetic field probe analyzer. The worst-case scenario for instantaneous physical direct and indirect effects was identified. Measurements within the frequency range of 25 Hz-2 kHz revealed localized magnetic flux density peaks above 100 μT at the 50 Hz frequency in three out of five chargers, registered in close proximity during the recharge. Beyond this distance, exposure indices were recorded showing values below 50% of reference levels. Bioelectromagnetics. 2020;41:308-317 © 2020 The Authors. Bioelectromagnetics published by Wiley Periodicals, Inc.

中文翻译：

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直流快速充电柱发出的低频磁场的评估。

电动汽车在运输系统中的即将到来的广泛使用引起了人们对电动汽车内部及其充电过程中产生的磁场的可能影响的关注。当前的趋势是增加车辆内部电池的容量以扩展可用的行驶里程并增加充电柱的功率以减少完全充电所需的时间。这导致更高的电流和潜在更强的磁场。联合研究中心的互操作性中心启动了一项实验活动，着重评估市场上可买到的五种快速充电设备在充电和待机条件下发出的低频磁场。这项研究的目的是促进标准测量程序的开发，以评估直流充电柱发出的磁场。通过磁场探针分析仪记录磁场的频谱和幅度，以及根据公众和职业暴露指南的暴露指数。确定了瞬时物理直接和间接影响的最坏情况。在25 Hz-2 kHz频率范围内的测量结果表明，在五分之三的充电器中，在50 Hz的频率下，局部磁通密度峰值在50 Hz时高于100μT，在充电过程中非常接近。超过此距离，记录暴露指数，显示低于参考水平的50％的值。生物电磁学。2020; 41：308-317©2020作者。