Research and overview of wireless charging technology for electric vehicle

Abstract

In recent years, in order to effectively reduce energy consumption, the development of electric vehicles has gained the attention of many countries. The wireless charging system of electric vehicles does not have exposed wires and connectors,meanwhile it can realize the indirect electrical power transmission between the grid and electric vehicles, it has gradually become an important direction of current research. This paper introduces the background of wireless charging technology in various countries, lists out the two types of wireless power transfer technology, and explains the current technology based on the principle of wireless charging for electric vehicles. Today's wireless charging technology is divided into near-field radiation power transfer and far-field radiation power transfer. The charging mode can be divided into dynamic charging and static charging. This paper illustrates the topology of compensation network used to adjust the frequency of the electromagnetic coupled resonant wireless charging system, and introduces the process of transmitting the grid voltage to the battery of electric vehicle through the inverter circuit and rectifying circuit. Finally, it analyzes the defects of current wireless charging technology and puts forward personal views for its solutions. Through the research, hope to provide some reference for the development of wireless charging technology for electric vehicles.