Study on the safety assessment and protection design of human exposure to low-frequency magnetic fields in electric vehicles

Abstract

Overview

This study addresses the increasing concerns regarding electromagnetic safety in the context of electric vehicle cabins. As electric vehicles improve in performance, there is a potential raise in electromagnetic fields within the cabin which could pose risks to human health.

Findings

• The study involved a comprehensive testing of an electric vehicle to assess the distribution of low-frequency magnetic fields inside the cabin.
• Methods included simulation analysis to determine magnetic flux density, induced electric fields, and current densities.
• Results indicated that all measurements are significantly below the limits set by GB8702-2014 and the International Commission on Non-Ionizing Radiation Protection.
• A discrepancy of less than 15% was found between the simulated results and actual test measurements.

Conclusion

This research affirms that current exposures are within safe limits; however, it suggests enhancements in certain areas to ensure absolute safety from low-frequency magnetic fields. Additionally, various factors like frequency, driving current, vehicle body material, and cable layout were examined to understand their effect on electromagnetic field alteration.