磁耦合无线能量传输中耦合模理论和电路理论的对比分析

Comparison and Analysis Results of Two Kinds of Modeling for Magnetically Coupled Wireless Power Transfer

磁耦合无线能量传输是一种新型无线能量传输方式,也称为磁共振耦合无线能量传输,业内对其能量传输原理迄今仍有分歧。目前国内外研究者对磁耦合无线能量传输进行原理分析的方法可归为三种:耦合模理论,散射矩阵分析理论和电路理论。本文分别从耦合模理论和电路理论这两个角度出发,建立系统模型,进行仿真和比较,并对其综合联系和分析。经过分析得出,电路理论是耦合模理论在电学上的进一步阐释,可以用电路理论对磁耦合无线能量传输原理进行解释。

Magnetically coupled wireless power transfer is a new type of wireless energy transmission mode,it is also called wireless power transfer via strongly coupled magnetic resonances.After years of development,domestic and foreign scholars studying on this area have got their own achievements,but have not reached an agreement for the principle of magnetically coupled resonance yet.There are three mainly used methods of modeling at present,namely the coupled-mode theory,the scattering matrices method and electric circuit theory.In this article we establish system models separately from the coupled mode theory and electric circuit theory,then move on to the simulation and comparison.By comparative analysis on the models,we conclude that the electric circuit theory is a further interpretation on the coupled mode theory in electricity.The circuit theory can be used to explain the principle of magnetically coupled resonances wireless power transfer.