摘要
随着电动汽车无线充电技术的普及,如何实现不同厂家、不同型号的地面端与车辆端设备之间的互联互通,已成为制约无线充电技术推广和规模化的关键性问题。该文首先通过定义归一化角频率和电路类品质因数Q、Qf表征系统频率与系统固有参数特性,提出一种电动汽车无线充电系统模型的简化方法,并对系统频率特性进行分析研究;然后提出基于频率调节提升电动汽车无线充电系统互操作性的方法;最后搭建大功率电动汽车无线充电互操作性实验平台,通过仿真与实验验证了通过频率调节提升互操作性的正确性。该文对电动汽车无线充电技术的推广与产业化发展提供了理论支撑与技术参考。
In recent years,electric vehicle wireless power transfer technology has been popularized and promoted due to its advantages of high safety,high reliability,high energy efficiency and high adaptability.However,with the development of the technology,it will inevitably lead to the coexistence of multiple manufacturers,models and technical routes.There are obvious differences in power level,transmission distance,coil type,compensation structure,control mode,packaging process,communication and other aspects.Therefore how to realize the interoperability between ground terminal equipments and vehicle terminal equipment which comes from different manufacturers and models has become the key to the development of electric vehicle wireless wireless power transfer technology.This paper proposes a method to improve system interoperability based on frequency regulation.And according to this method the output characteristics of systems without interoperability or with poor interoperability can be improved in a wide range.Firstly,the fundamental wave analysis method is used to construct the KVL equation for the wireless power transfer system of LCC-LCC type electric vehicle.By defining the normalized angular frequency,the circuit similar quality factor Q and Qf to characterize the system frequency and the inherent parameter characteristics and simplify the equation of the system.Then simplify the expressions of the system output power and system efficiency by using the relationship of the order of magnitude under.According to the above study,the change curves of the output power and system efficiency under different system parameters are determined.The above analysis proves theoretically the influence of system frequency on interoperability.A method to improve the interoperability of the wireless power transfer system based on frequency regulation is proposed.US,IS,UL,IL is the power supply voltage,power supply current,load voltage and load current respectively.First,determine the optimal resonance point of the system through si
作者
陈志鑫
张献
沙琳
杨庆新
孙于
刘立东
Chen Zhixin;Zhang Xian;Sha Lin;Yang Qingxin;Sun Yu;Liu Lidong(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300131,China;Tianjin Key Laboratory of Electrical Equipment Intelligent Control Tiangong University,Tianjin 300387,China;China Electrotechnical Society,Beijing 100055,China;Hengdian Group DMEGC Magnetics Co.Ltd,Jinhua 322118,China)
出处
《电工技术学报》
EI
CSCD
北大核心
2023年第5期1237-1247,共11页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(52122701,51977147,51807138)。
关键词
无线充电
互联互通
互操作性
频率调节
归一化角频率
Wireless power transfer
interconnection
interoperability
frequency adjustment
normalized angular frequency
