基于副边可变电容的IPT恒流恒压充电系统研究  

Secondary-side Variable Capacitor-based IPT System for Constant Current and Constant Voltage Charging

作　　者：李乔 李明轩 杨斌 陈阳[1] 麦瑞坤[1] 李伟华 LI Qiao;LI Mingxuan;YANG Bin;CHEN Yang;MAI Ruikun;LI Weihua(School of the Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China;College of Electrical and information,Jinan University,Zhuhai 519070,Guangdong Province,China)

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031 [2]暨南大学电气信息学院,广东省珠海市519070

出　　处：《中国电机工程学报》2019年第19期5741-5749,共9页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2017YFB1201002);国家自然科学基金项目(51677155);国家杰出青年科学基金(51525702)~~

摘　　要：为了减少基于感应电能传输技术的变补偿拓扑充电系统的开关器件和无源元件数量,同时保证系统恒压充电时有相对较高的效率,该文基于串/串并补偿拓扑,在副边电路增加一个交流开关和一个附加电容,通过切换开关的关断改变副边串联补偿电容,从而实现系统的恒流恒压切换。该方法无需原副边通信及复杂的控制电路,系统结构简单,所需元件较少。在恒流模式充电阶段系统输入阻抗呈感性,能实现零电压开关;在恒压模式充电阶段输入阻抗为纯阻性,几乎没有无功功率输入。实验结果表明,所提出方法的输出恒流和输出恒压在电池等效负载变化的同时有细微的波动,但实验结果仍然满足对电池充电的要求;此外,系统恒流时最高效率为92.2%,恒压时最高效率为94.2%。In order to reduce the number of switching devices and passive components of the hybrid topology inductive power transfer(IPT) charging systems, as well as to keep the system relatively high efficiency in constant voltage charging mode, a secondary-side variable capacitor-based IPT system was proposed in this paper. On the basis of series/series-parallel(S/SP) compensation topology, an AC switch and an additional capacitor were added on the secondary side. The value of the secondary side compensation capacitor was altered by turning off the switch, so that the constant current-constant voltage(CC-CV) charging modes were changed. Communication between the primary and secondary sides or sophisticated control scheme isn’t required, and the proposed method has simple structure and less components. In CC mode, the input impedance of the system is inductive and zero voltage switching is achieved. In CV mode, the input impedance of the system is resistive so there is nearly no reactive power. Experimental results indicate that the charging current in CC mode and charging voltage in CV mode of the proposed approach are both slightly changing against variable loads, but they still satisfy the charge requirements. Moreover, the maximum efficiency of the system is 92.2% in CC mode, and it can hit 94.2% in CV mode.

关 键 词：感应电能传输 串/串并补偿拓扑 恒流 恒压 电池充电 

分 类 号：TM91[电气工程—电力电子与电力传动]