电动汽车三相无线充电系统关键技术研究综述

Review of Key Technologies of Three-phase Wireless Charging System for Electric Vehicles

电动汽车无线充电技术是推动电动汽车走向智能化和无人化的重要技术手段,高效率、高功率密度、大偏移和低成本等要求是电动汽车无线充电技术面临的挑战。三相无线充电系统由于具有功率密度高、磁场分布均匀和抗偏移能力强等优点,受到了越来越多的关注。围绕电动汽车三相无线充电系统的磁耦合机构、补偿网络和高频逆变器,归纳总结了这些关键技术的研究现状,分析讨论了亟待解决的问题及今后的发展趋势。

The wireless charging technology is an important technical means to promote electric vehicles(EVs)to become intelligent and unmanned,which faces challenges including the requirements of high efficiency,high power density,large offset,low cost,etc.The three-phase wireless charging system has attracted more and more attention owing to its high power density,uniform magnetic field distribution and strong anti-offset capability.The research status of these key technologies of three-phase wireless charging system for EVs is summarized from three aspects,i.e.,magnetic coupler,compensation network and high-frequency inverter,and the hot issues and development trend in the future are analyzed and discussed.