无线传能机车人体电磁环境安全研究

An Electromagnetic Safety Study about Human Body in Electric Locomotive Wireless Charging System

随着无线电能传输技术在铁路系统的应用,电磁安全问题引起越来越多人的关注。为了有效评估乘客及司机在无线传能机车内的电磁安全问题,该文利用三维电磁仿真软件构建无线传能系统辐射下车内人员电磁环境模型,研究处于车厢内不同位置的司机和三名乘客(乘客A、乘客B、小孩)暴露的磁场强度、电场强度和电流密度的分布情况。结果表明:位于司机室的司机感应电场强度最小,其感应电场强度值为2×10^(-5)V/m;乘客A感应电场强度为最大,其最大值达到0.55V/m;乘客B所处的车厢连接风挡处磁场强度最大,其最大值为2.78A/m;感应电流密度最大值出现在乘客B的腹部位置,其最大值为13.7μA/m^(2)。所有计算结果均低于国际非电离辐射防护委员会(ICNIRP)导则的电磁场限值,说明位于车内的司机和乘客都是安全的。最后通过现场测试得到的数据与数值计算结果对比,结果较为吻合,进一步验证了仿真的正确性。

With the application of wireless power transfer technology in railway system,electromagnetic safety has attracted more and more attention.In order to effectively evaluate the electromagnetic field of the human body exposed to the high-power catenary-free power supply urban rail transit vehicle,3d electromagnetic simulation software is used to build the electromagnetic environment model of personnel,and the distribution of magnetic field intensity,electric field intensity and current density of the driver and three passengers(passenger A,B and child)at different positions is studied.The results show that the driver's induced electric field intensity is the lowest,and its induced electric field intensity is 2×10^(-5)V/m.Passenger A has the maximum induced electric field intensity,which reaches 0.55V/m.The magnetic field intensity at the windscreen connecting the carriage where passenger B is standing is the largest,and its maximum value is 2.78A/m.The maximum induced current density is 13.7μA in passenger B's abdomen.All the calculated results are below the electromagnetic field limits of the International Commission on non-ionizing radiation protection(ICNIRP)guidelines,indicating that both the driver and passengers in the vehicle are safe.Finally,the field measurement data is compared with the numerical calculation results,and the results are in good agreement,which further verifies the correctness of the simulation.