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基于磁负超材料的无线电能传输系统

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Keywords: MCR-WPT,磁负超材料,HFSS,传输效率

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Abstract:

针对MCR-WPT系统的传输效率受距离约束程度高等问题,本文分析讨论了磁负超材料介质板对MCR-WPT系统传输效率的影响,推导并验证了磁负超材料介质板对消逝波传输的增强作用.利用HFSS构造了一种工作在ISM频段的MCR-WPT系统,并设计了一种适合该MCR-WPT系统的低频平面螺旋型磁负超材料介质板.当系统工作频率大于25MHz时,该低频磁负超材料介质板表现出磁负特性.通过将所设计的不同周期排列的磁负超材料介质板放置在MCR-WPT系统的不同位置,研究了不同条件下螺旋型磁负超材料介质板对系统传输效率影响.仿真和实验结果表明在MCR-WPT系统发射端插入小尺寸磁负超材料介质板,接收端插入中等尺寸磁负超材料介质板时,系统传输效率能够得到有效提高;在传输距离不变的前提下,加入磁负超材料介质板后MCR-WPT系统的传输效率至少提高20%,其中实验平台中系统传输效率提高了近30%.

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