【作者】 陈浩；

【导师】 何湘宁； 吴建德；

【作者基本信息】 浙江大学 ， 电气工程， 2022， 硕士

【摘要】 电动汽车的无线充电(wireless electric vehicle charging,WEVC)是未来电动汽车领域发展的重要技术,具有方便、灵活、可靠的优点。感应式无线电能传输是目前最适合用于商业化的WEVC的技术。一个完善的WEVC系统,不仅需要实现高效的无线电能传输,还要具备多种辅助功能,包括:地面端(ground assembly,GA)与车辆端(vehicle assembly,VA)之间高速可靠的无线通信、GA充电线圈表面高灵敏度的异物检测以及高精度的充电线圈位置检测。本文围绕这三项关键功能,通过高频辅助载波注入技术,提出了一套集成VAGA近场通信(near-field communication,NFC)的电动汽车无线充电金属异物检测(metal object detection,MOD)和充电线圈位置检测(position detection,PD)的设计方法。首先,本文分析了现有WEVC辅助系统研究中存在的集成度低、无法独立于电能传输工作的问题。为解决这些问题,本文在无线电能/数据复合传输技术的基础上,提出了基于高频辅助载波实现VA-GA NFC、MOD和PD的方案。其次,提出了一种双用途检测线圈阵列作为MOD和PD传感器,并分别分析了检测线圈在执行MOD和PD时的工作原理,设计了检测线圈阵列扫描和信号处理电路。这种功能集成化的设计减少了元件,简化了WEVC系统的结构。此外,由于高频辅助载波独立于电能传输状态,因此,上述3项辅助功能都能够工作在同时传输电能和不传输电能的情况下。最后,搭建了WEVC系统验证平台,平台具备3.3k W无线电能传输和上述3项辅助功能。实验结果表明,该集成系统能够实现高速全双工的NFC通信、高灵敏度无盲区的MOD和高精度的PD。综上,本文基于功能复用和集成设计思想,对电动汽车无线充电系统中必备的辅助功能进行了研究,通过高频辅助载波的引入和双用途检测线圈的设计,提出了集成NFC通信、金属异物检测、充电线圈位置检测的电动汽车无线充电系统,为电动汽车无线充电商业化进程提供了思路。更多还原

【Abstract】 In recent years,the electric vehicle industry has been widely concerned and developed all over the world.Compared with the traditional conductive charging method,the wireless electric vehicle charging(WEVC)has the advantages of convenient,flexible and fully automatic charging,and is one of the important technologies of unmanned and intelligent electric vehicles in the future.Among numerous wireless charging methods,inductive power transfer(IPT)is the most suitable for commercial WEVC.A safe and reliable commercial WEVC system requires not only efficient power transmission,but also a variety of auxiliary functions,including high-speed and reliable wireless communication between ground assembly(GA)and vehicle assembly(VA),highly sensitive metal object detection(MOD)on the surface of GA coil and high-precision position detection(PD)of power coils.This paper focuses on these three key auxiliary functions.Through the introduction of highfrequency aided carrier injection technology and the design of dual-purpose detection coil array,a MOD and power coil PD system integrated with VA-GA near-field communication(NFC)is proposed for WEVC.First,the problems of low integration of existing WEVC auxiliary function technologies and its inability to work in both power transmission online and offline condition are analyzed.In order to solve this problem,a VA-GA NFC,MOD and PD method using high-frequency aided carrier based on the simultaneous wireless power and data transmission technology is proposed in this paper.Second,a dual-purpose detection coil array is proposed as MOD and PD sensor,and the working principle of the detection coil in the execution of MOD and PD is analyzed respectively.The detection coil array scanning circuit and signal processing circuit are also designed.This functional integration reduces the use of components and circuits and simplifies the structure of the WEVC system.In addition,as the high-frequency aided carriers are independent of the power transmission status,the above three auxiliary functions can work in power transmission both online and offline conditions.Finally,an integrated WEVC prototype is built,possessing 3.3k W wireless power transmission and above three auxiliary functions.Experimental results show that the integrated system can realize high-speed full-duplexed NFC,high-sensitivity non-blind zone MOD and highprecision PD.In conclusion,based on the idea of integration and generalization,this paper studies the necessary auxiliary functions in WEVC system.Through the design of the highfrequency aided carrier injection and dual-purpose detection coil array,the WEVC system that integrated GA-VA NFC,MOD,and PD is proposed,which provides an idea for the commercialization of WEVC.更多还原