磁谐振LED供电系统的传输特性分析

Transfer characteristics analysis of magnetic resonant LED power supply system

针对无线电能传输系统中输出功率和传输效率问题,以近场磁谐振耦合LED无线供电系统为对象,利用耦合模式理论(CMT)建模方法对系统的输出功率和传输效率等传输特性进行优化分析。通过CMT构建出无线电能传输网络的等效耦合模型,导出输出功率与耦合系数、传输效率与耦合系数间的量化关系式,进而确定出系统的最大输出功率表达式。最后,结合磁谐振LED供电系统实验结果,验证了所构建耦合模型的有效性和理论分析的正确性,初步论证了磁谐振无线电能传输的工程潜在应用可行性。

As to the output power and transmission efficiency problem of wireless power transmission system, with a near-field magnetic resonant coupling LED wireless power supply system as the research object, coupled mode theory （CMT） modeling method was applied to analyzing the system transmission characteristics. An equivalent coupling model of the wireless power transmission system was constructed based on CMT. Based on the model, the quantitative relationships between output power and coupling coefficient and between transfer efficiency and coupling coefficient were derived, and the expression of maximum output power was further obtained. Finally, some experiment results of a magnetic resonant coupling LED supply system verify the validness of the CMT model and the correctness of the theoretical analysis, showing the engineering potential application feasibility of the magnetic-resonant wireless power transmission.