Electromagnetic Environment Analysis of High-Power Wireless Charging Device

TL;DR

This study measures and analyzes the electromagnetic radiation around high-power wireless charging devices for electric vehicles, revealing decay patterns and suggesting improved shielding to reduce public exposure.

Contribution

It provides empirical data on electromagnetic field distribution around EV wireless chargers, aiding in understanding environmental impact and guiding shielding improvements.

Findings

Electric field strength ranges from 0.9 V/m to 74.7 V/m.

Magnetic induction intensity ranges from 0.12 μT to 27.06 μT.

Electromagnetic fields decay rapidly with distance from the vehicle.

Abstract

Objective Aiming at the problems of many interference factors in the electromagnetic radiation simulation of electric vehicles, a field measurement scheme for charging devices is designed. Through the monitoring of wireless charging equipment, the radiation level and distribution of the electric field value and magnetic field value around the charging equipment is explored, to analyze the influence law of the electromagnetic environment. Method This paper introduces the principle and development status of electric vehicle charging, and analyzes the classification and methods of wireless charging. In this paper, the electric field and magnetic field of cars and minibuses are monitored, at positions such as: around the body, attenuation section, inside the car and inside the minibus. Result The range of electric field strength is 0.9 V/m to 48.1 V/m for cars, and 0.8 V/m to 74.7 V/m for minibuses. The electric field strength decays rapidly with the increase of the distance from the vehicle body, and the law is obvious. The range of magnetic induction intensity is 0.12{\mu}T-12.70{\mu}T for cars, and 0.15{\mu}T-27.06{\mu}T for minibuses. The magnetic induction intensity decays rapidly with the increase of the distance from the vehicle body, and the law is obvious. Conclusion This paper explores the radiation level and distribution of the electromagnetic field around this type of charging equipment. It is recommended that manufacturers of wireless charging devices for electric vehicles strengthen research on electromagnetic radiation shielding and take corresponding measures to control the level of electromagnetic radiation in areas accessible to the public.