基于LCL谐振补偿网络的副边自动切换充电模式无线电能传输系统研究与设计

doi:10.19595/j.cnki.1000-6753.tces.181060

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摘要为满足电池在无线充电过程中所需要的先恒流输出后恒压输出的充电需求,该文从电路本质特性出发,基于LCL谐振补偿网络结构,提出一种通过切换副边的谐振补偿网络参数完成恒流充电模式向恒压充电模式的自动切换方法。所提出的方法可以免去原、副边之间的无线通信,且不需要改变原边的输入电压和频率。该文以谐振补偿网络两个电感比值α=1条件下的LCL型谐振补偿结构为例,对所提出的设计方法进行了分析和验证,搭建了一套实验平台,实现了线圈距离在20cm条件下,输出功率为1kW,效率为92%,恒流输出为5V,恒压输出为205V的WPT系统。实验表明,应用所提方法,能够实现电池在无线充电的过程中先恒流输出后恒压输出的充电需求,且切换过程自动、稳定。

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关键词 ：无线电能传输, LCL谐振补偿网络结构, 恒流输出, 恒压输出

Abstract：In the process of wireless charging for battery, constant current (CC) mode at first and then constant voltage (CV) mode is needed. From the character of resonant circuit, this paper presents an automatic switching method of constant current charging mode to constant voltage charging mode by switching the resonance compensation network parameters at the secondary side based on LCL type compensation network. The proposed changing method can eliminate communications between the primary side and the secondary side and the complex control methods at the primary side and without changing the input voltage and frequency. By an example of changing LCL resonant compensation network at the condition of α=1, the proposed design methods are analyzed and verified, and a set of experiment with 20 centimeters between the coils was built, and a system with output power of 1kW, efficiency of 92%, and constant current output of 5A, constant output voltage of 205V was realized. The experiment shows that the application of the proposed method can realize the demand of constant voltage output after constant current output in the process of wireless charging, and the switching process is automatic and stable

Key words： Wireless power tranfer LCL compensation network constant current constant voltage

收稿日期: 2018-06-20 出版日期: 2018-09-26

PACS:

TM724

基金资助:国家重点研发计划资助项目（2016YFE0102200）

通讯作者: 王丽芳女,1971年生,研究员,博士生导师,研究方向为电动汽车无线充电技术、动力电池管理、整车控制技术、智能车与电磁兼容技术等。E-mail：wlf@mail.iee.ac.cn

作者简介: 吉莉女,1981年生,博士,高级工程师,研究方向为电动汽车无线充电技术、无线携能通信技术。E-mail：jili@mail.iee.ac.cn

引用本文:

吉莉, 王丽芳, 廖承林, 李树凡. 基于LCL谐振补偿网络的副边自动切换充电模式无线电能传输系统研究与设计[J]. 电工技术学报, 2018, 33(zk1): 34-40. Ji Li, Wang Lifang, Liao Chenglin, Li Shufan. Research and Design of Automatic Alteration between Constant Current Mode and Constant Voltage Mode at the Secondary Side Based on LCL Compensation Network in Wireless Power Tranfer Systems. Transactions of China Electrotechnical Society, 2018, 33(zk1): 34-40.

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