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无线电能传输中的高频阻抗匹配特性分析
Analysis of high frequency impedance matching for wireless power transfer
投稿时间:2018-07-30  修订日期:2018-08-30
DOI:
中文关键词:  线电能传输  阻抗匹配  传输线  传输效率  高频
英文关键词:wireless power transfer  impedance matching  transmission line  transmission efficiency
基金项目:国家自然科学基金(No: 51677177; 61501454; 51407181)
作者单位E-mail
宋显锦 山西大学电力工程系 sxsxj@163.com 
张超 中国科学院电工研究所 zhangchao@mail.iee.ac.cn 
徐小宇 中国科学院微电子研究所 xuxiaoyu@ime.ac.cn 
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中文摘要:
      磁谐振式线电能传输技术是基于磁谐振耦合现象利用近区磁场进行非辐射性、中距离输电的新技术。阻抗匹配技术在线电能传输中广泛使用,用以增加传输距离,提高传输效率,使负载获最大功率。常规变压器适于在低频下作阻抗匹配,高频时磁芯容易饱和发热,降低传输效率。使用传输线原理绕制的变压器通过线间电感和电容耦合传输能量,可用于高频传输,亦可在线电能传输系统中使用。文章分析了线电能传输阻抗匹配原理,分析了传输线原理绕制的变压器匹配特性,使用高频变压器进行了线电能传输的比较实验。实验结果表明高频变压器可用于线电能传输,匹配得当时,增加传输距离的同时,可保持传输效率和最大输出电压,是提高线电能传输性能的一种可选方法。
英文摘要:
      Magnetic resonant wireless power transmission is a new type of technology which conducts non-radiative, mid-range power transmission using the near magnetic field based on resonant coupling phenomena. Impedance matching technology is widely used in wireless power transfer to increase transmission distance,to improve the transmission efficiency and to provide the maximum power for the load. The conventional transformers are used for impedance matching in low frequencies, for the magnetic cores can be saturated and easy to be heated in high frequencies and the transmission efficiency will be reduced. The transformers wound by using the transmission line theory can be used for high frequency transmission which exchanged energy through inductance and capacitance coupling between transmission lines. In this paper, the principle of impedance matching for wireless power transfer is analyzed, and the comparison experiments are carried out using high frequency transformers. The experimental results show that the high frequency transformer can be used in wireless power transfer, and the system can maintain the transmission efficiency and the maximum output voltage while increases transmission distance under appropriate matching, therefore, it is an alternative method to improve the performance of wireless power transfer.
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