电动汽车动态无线供电系统发射单元切换模式分析

doi:10.19595/j.cnki.1000-6753.tces.190636

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摘要在动态无线供电系统中,多发射线圈交替工作是提高电动汽车动态无线充电系统效率的有效途径。该文首先推导动态耦合过程的互感表达式,得到互感随位移而变化,进而影响传输功率的结论。其次,为提高输电系统的稳定性,减小由于发射端切换而导致的传输功率降低,对最小动态耦合单元的工作全周期进行分析,并通过有限元仿真软件设计了三组仿真进行对比,证明了双线圈同时供电方案相比轮流交替供电在提高互感和接收功率方面的有效性,并且提出了在0.1~0.3m这一最佳区间内实行双线圈同时供电,而在最佳区间范围之外实行单线圈供电的供电模式。最后,基于所提出的供电方案搭建实验平台进行了测试。结果表明,在最佳区间内实现第一、二发射线圈同时供电可以显著提高无线电力系统的稳定性,减小接收功率的降低。

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关键词 ：电动汽车, 动态无线充电, 供电模式, 最佳区间

Abstract：In dynamic wireless charging (DWC) system, the alternate work of multi-transmitters is an effective way to improve the efficiency. Firstly, the paper inferred the mutual inductance expression, and then obtained the conclusion that mutual inductance changes with movement and then affects the transmission power. Secondly, in order to reduce the power fluctuation caused by transmitter switching and improve the stability of DWC system, the working cycle of the minimum dynamic coupling unit was analyzed. Three groups of simulation were designed and compared using the finite element software, which proved the dual coil supply scheme is more effective than alternate power supply scheme in improving mutual inductance and receiving power compared. In addition, a power supply mode with dual coil supply in the optimal range of 0.1m to 0.3m and single coil supply outside the optimal range was proposed. Finally, an experimental platform was built based on the proposed power supply scheme, which shows that the simultaneous power supply of the first and second transmitters in the optimal interval improves the stability of the DWC system and reduces the reduction of receiving power.

Key words： Electric vehicle dynamic wireless charging power supply mode optimal interval

收稿日期: 2019-05-25

PACS:

TM72

基金资助:国家自然科学基金项目(51607121,51877151)、国家重点研发计划(2018YFB0106300)和天津市自然科学基金项目(18JCQNJC70500)资助

通讯作者: 薛明男,1987年生,博士,研究方向为无线电能传输技术。E-mail: xueming@tjpu.edu.cn

作者简介: 王嘉浩男,1994年生,硕士,研究方向为工程电磁场与磁技术。E-mail: xueshuowang123@163.com

引用本文:

薛明, 王嘉浩, 杨庆新, 李阳. 电动汽车动态无线供电系统发射单元切换模式分析[J]. 电工技术学报, 2020, 35(12): 2517-2525. Xue Ming, Wang Jiahao, Yang Qingxin, Li Yang. Analysis of Transmitter Unit Switching Mode in Dynamic Wireless Charging for Electric Vehicles. Transactions of China Electrotechnical Society, 2020, 35(12): 2517-2525.

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