电动汽车无线充电磁耦合器设计及其损耗分析
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摘要
针对电动汽车(EV)无线充电中磁耦合器损耗的问题,研究了双LCC复合谐振补偿电路的EV无线充电方法。通过分析影响电能传输效率的因素,对磁耦合器进行漏磁场屏蔽仿真和损耗分析,设计了高效率的磁耦合器。在EV160电动汽车上进行了实验,输入功率3.7 kW,磁耦合器传输效率95.4%以上,整机最大传输效率87.2%,最小传输效率68.4%,有效降低了漏磁场产生的涡流损耗,提高了传输效率。
In order to solve the loss of the magnetic coupler in wireless charging of electric vehicle(EV),the wireless charging technology of dual LCC resonant compensation circuit is studied.By analyzing the factors that affect the efficiency of power transmission, the leakage magnetic field shielding simulation and loss analysis of the magnetic coupler are carried out,the high efficiency magnetic coupler is designed.With the experiments on EV160,the results show that the input power is 3.7 kW,the transmission efficiency of magnetic coupler is over 95.4%,the maximum transmission efficiency is 87.2% and the minimum is 68.4%.This method can effectively reduce the eddy current loss which is generated by the leakage magnetic field and improve the transmission efficiency.
In order to solve the loss of the magnetic coupler in wireless charging of electric vehicle(EV),the wireless charging technology of dual LCC resonant compensation circuit is studied.By analyzing the factors that affect the efficiency of power transmission, the leakage magnetic field shielding simulation and loss analysis of the magnetic coupler are carried out,the high efficiency magnetic coupler is designed.With the experiments on EV160,the results show that the input power is 3.7 kW,the transmission efficiency of magnetic coupler is over 95.4%,the maximum transmission efficiency is 87.2% and the minimum is 68.4%.This method can effectively reduce the eddy current loss which is generated by the leakage magnetic field and improve the transmission efficiency.
引文
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[6]陈琛,黄学良,谭林林,等.电动汽车无线充电时的电磁环境及安全评估[J].电工技术学报,2015,30(19):61-67.
[2]王智慧,吕潇,孙跃,等.谐振式无线电能传输系统损耗模型[J].电工技术学报,2014,29(9):17-21.
[3] Deng J,Li W, Nguyen T D,et al.Compact and Efficient Bipolar Coupler for Wireless Power Chargers:Design and Analysis[J].IEEE Trans. on Power Electronics,2015,30(11):6130-6140.
[4]张献,杨庆新,崔玉龙,等.大功率无线电能传输系统能量发射线圈设计、优化与验证[J].电工技术学报,2013,28(10):12-18.
[5]卢闻州,沈锦飞,方楚良.磁耦合谐振式无线电能传输电动汽车充电系统研究[J].电机与控制学报,2016,20(9):46-53.
[6]陈琛,黄学良,谭林林,等.电动汽车无线充电时的电磁环境及安全评估[J].电工技术学报,2015,30(19):61-67.