Magnetic Field Exposure Evaluation for Wireless Charging System of Vehicles

Abstract

The safety of electrical vehicle involves three aspects, battery industry, charging industry and vehicle industry. Wireless charging system works on the basis of electromagnetic induction principle. The magnetic field is generated when the current flows through the primary coil. Meanwhile, the secondary coil near the magnetic field produces induced current. In the process of energy transmission, magnetic field leakage may affect the devices and human body around the system. If the field strength reach a certain threshold, it may result in harmful effects on human body. In this paper, the existing wireless charging related standards are summarized and the impact of wireless charging system on human health is analyzed by comparing the magnetic radiation generated by wireless charging system with general public exposure reference limit.