• RADIATION PROTECTION •

### Electromagnetic exposure level in human body to low frequency electromagnetic fields from electric vehicle power cable

DONG Xuwei(),LU Mai()

1. Key Laboratory of Opto-technology and Intelligent Control, Ministry of Education, Lanzhou Jiaotong University, Lanzhou 730070, China
• Received:2019-04-25 Revised:2019-05-29 Accepted:2019-05-29 Online:2019-10-20 Published:2019-10-15
• Contact: Mai LU E-mail:dxw007@126.com;mai.lu@hotmail.com
• Supported by:
National Natural Science Foundation of China(51567015);Opening Project of Key Laboratory of Opto-Technology and Intelligent Control;Ministry of Education(2018015);Lanzhou Jiaotong University Fund for Distinguished Young Scholars(2016006)

Abstract:

To study the safety of passengers in the cabin of an electric vehicle, the electromagnetic exposure produced by the low frequency current in the vehicle’s power cable was modeled. The low frequency current was used as the excitation source, and the magnetic induction intensity, induction current density, and induction electric field intensity in the trunk and central nervous system of the driver and co-driver were calculated and analyzed using the Comsol Multiphysics finite element software. The results showed that the maximum values of magnetic induction intensity in the central nervous system were concentrated in the scalp area. The maximum induction intensity values were 0.073×10-2 μT and 0.055×10-2 μT in the driver and co-driver’s seats, respectively. The maximum induced current densities were mainly concentrated in the brain tissues, being 11.3 μA/m2 and 0.616 μA/m2 in the driver and co-driver’s seats, respectively. Similarly, the maximum induced electric field values were also mainly concentrated in the brain tissues, reaching 0.426 mV/m and 0.013×10-2 mV/m in the driver and co-driver’s seats, respectively. In addition, from the distribution trend of the induction field, the lower the distance to the power cable is, the larger is the value of the induction field; conversely, the greater the distance, the weaker is the induction field. In conclusion, comparing the maximum induction field value with the ICNIRP standard and national standard GB8702-2014, the maximum values of the induction field in the central nervous system and trunk were found to be much smaller than the maximum exposure limit stipulated by the standards. Therefore, the electromagnetic exposure in this low frequency electromagnetic environment is within a safe range.

CLC Number:

• X837