电动汽车无线充电电磁环境安全性研究

近年来,无线电能传输技术的应用越来越广泛,其中一个主要应用就是在电动汽车无线充电方面。为有效评估人体在电动汽车无线充电电磁环境下的安全性,利用基于有限元法的三维电磁仿真软件,构建电动汽车无线充电电磁辐射下的人体电磁环境模型,研究人体主要器官的电磁暴露问题。结果表明:不同的组织器官由于其电磁参数不同而对电磁波有不同的吸收,其中电流密度最大值为20.058m A·m-2,功率密度最大值为1.22×10-5W·m-2,比吸收率最大值为4.37×10-7W·kg-1,皆低于国际非电离辐射防护委员会(ICNIRP)导则的安全限值,这说明人体在此电磁环境下基本是安全的。

Electromagnetic Enrironment Safety Study of Wireless Electric Vehicle Charging

In recent years, wireless power transfer has been widely applied. One of the main applications is electric vehicle charging. To effectively evaluate the safety of human body in the electric vehicle (EV) charging electromagnetic environment, 3D electromagnetic simulation software is used to build the electromagnetic environment of the electric vehicle charging model. Accordingly, the electromagnetic exposure problems of the main tissues are studied. The results show that different tissues in human body have different absorption of electromagnetic waves because of their different electromagnetic parameters. Herein, the maximum current density is 20.058mA·m?2, the maximum power density is 1.22×10?5W·m?2, and the maximum SAR value is 4.37×10?7W·kg?1, which are all below the safety limits of ICNIRP guidelines. It is shown that the human body in the electromagnetic environment is basically safe.