摘要
在利用无线电能传输(WPT)技术为电池充电过程中,为了保证电池寿命和安全,会采用恒流(CC)-恒压(CV)充电模式。为此,提出了一种串联-串联(SS)和LLC的混合拓扑。在SS拓扑基础上,原边额外串联一个由开关并联的电容,并在副边串联的电容上并联开关。当开关断开时,系统利用SS拓扑保证输出为恒流。当满足切换条件时,通过闭合开关,将系统切换至LLC拓扑,使系统为恒压输出。针对两种系统拓扑的WPT系统,通过KVL方程进行数学建模和理论分析,确立了满足CC/CV模式下的系统参数和切换条件。最后,搭建了与理论分析一致的实验样机,验证了系统能实现CC和CV两种模式,满足系统充电要求。在CC模式下系统效率最高可达95%。
In the process of using wireless power transfer(WPT)technology to charge batteries,constant current(CC)-constant voltage(CV)charging mode is adopted to ensure battery life and safety.Therefore,a hybrid topology of series-series(SS)and inductor-inductor-capacitor(LLC)topology was proposed.Based on the SS topology,an additional capacitor is connected in parallel with a switch is connected in series on the primary side.On the secondary side,a switch is connected in parallel with the capacitor.When the switch is off,the system operates as the SS topology with a constant current.When the switching condition is satisfied,the system is switched to LLC topology by closing the switches,so that the system has constant voltage output.Two kinds of WPT system topologies were modeled and analyzed by KVL equations,and the system parameters and switching conditions satisfying CC/CV mode were established.The experimental prototype was built according to the theoretical analysis.The experimental results show that the system can work in CC and CV modes,and meet the charging requirements of the system.In CC mode,the maximum system efficiency can reach up to 95%.
作者
李新
李云笛
姜捷
付学光
LI Xin;LI Yundi;JIANG Jie;FU Xueguang(CRRC Dalian Co.,Ltd.,Dalian 116022,Liaoning,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,Sichuan,China)
出处
《电气传动》
2022年第22期27-31,共5页
Electric Drive
关键词
无线电能传输
混合拓扑
恒流/恒压
wireless power transfer(WPT)
hybrid topology
constant current(CC)/constant voltage(CV)
