摘要
为了兼顾充电效率与使用寿命,锂电池通常采用先恒流后恒压的充电模式。引入了一种用于锂电池充电的可切换串联混合拓扑WPT系统。系统无需次级侧的实时反馈与复杂的控制策略即可从恒流模式切换至恒压模式。首先,基于T模型对混合拓扑进行了理论分析,推导出混合拓扑WPT系统在恒定频率与零相角的条件下输出与负载无关的恒定电流和恒定电压。其次,在电力电子仿真软件中搭建了模型,分析了恒压模式下两种拓扑的工作特性及系统效率特性。最后,搭建了一个充电电流为3.5 A,充电电压为65 V的WPT实验平台。实验结果表明:在广泛的负载范围内,恒流模式下,电流波动小于5.9%;恒压模式下,电压波动小于8%。
To balance the charging efficiency and service life,lithium-ion batteries usually require constant current followed by constant voltage charging mode.A switchable series hybrid topology WPT system for charging lithium-ion batteries has been introduced in this paper.The system can be switched from constant current mode to constant voltage mode without real-time feedback from secondary sides and complex control strategies.Firstly,based on the T model,a theoretical analysis of the hybrid topology has been carried out,which deduced that the hybrid topology WPT system outputs load-independent constant current and constant voltage at constant frequency and zero phase angle.Secondly,a model has been built in the power electronics simulation software to analyze the operating characteristics of the two topologies in constant voltage mode and system efficiency.Finally,a WPT experimental platform with a charging current of 3.5Aand a charging voltage of 65Vhas been built.The experimental results showed that the current fluctuation is less than 5.9%in constant current mode and the voltage fluctuation is less than 8%in constant voltage mode over a wide range of loads.
作者
于天琦
李建贵
王琛
丁一硕
程钰莹
Yu Tianqi;Li Jiangui;Wang Chen;Ding Yishuo;Cheng Yuying(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《电子测量技术》
北大核心
2023年第21期1-6,共6页
Electronic Measurement Technology
关键词
无线电能传输
可切换混合拓扑
恒流输出
恒压输出
wireless power transfer
switchable hybrid topology
constant current
constant voltage
作者简介
于天琦,硕士研究生,主要研究方向为无线电能传输。E-mail:1797637666@qq.com;通信作者:李建贵,教授,主要研究方向为新型电机及控制、电动汽车驱动及控制、无线电能传输、新型磁性材料、可再生能源发电等。E-mail:jianguili@whut.edu.cn;王琛,硕士研究生,主要研究方向为无线电能传输。E-mail:1104593662@qq.com;丁一硕,硕士研究生,主要研究方向为无线电能传输。E-mail:2786339926@qq.com;程钰莹,硕士研究生,主要研究方向为永磁同步电机设计。E-mail:2409375826@qq.com
