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基于散射矩阵的无线电能传输系统电磁耦合效率测量方法的研究

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Keywords: 无线电能传输,电磁耦合效率,二端口网络,等效散射矩阵

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Abstract:

针对磁耦合谐振无线电能传输系统的磁场耦合效率进行研究,分析了无线电能传输系统能量传输的逻辑关系,将系统网络等效为两个子网络级联,基于各个二端口网络散射矩阵的等效关系,推导出计算两个子网络间电磁场耦合效率的模型。提出基于散射矩阵的无线电能传输系统电磁耦合效率测量方法,通过仿真或实际测量获得S参数,通过S参数的计算得到无线电能传输系统的电磁耦合效率。计算结果与系统能量传输变化规律一致,证明了该测量方法的可行性。该方法测量步骤简单、实时性强,对于分析、优化传输系统的效率具有实用价值。

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