CAJ | 학술논문

为了提高磁耦合共振系统的能量传输效率，通过研究系统无线能量传输特性，探索了系统传输效率随耦合距离变化的规律。基于二端口网络分析方法，建立了磁耦合共振无线能量传输的等效电路模型，求解出共振系统发生频率分叉现象产生的条件以及最大效率时的频率表达式。通过数值仿真对共振系统传输特性进行了分析，揭示了系统的固有共振频率会随着耦合距离的增加，由两个相差较远的共振频率逐渐靠近，直至跨越临界条件，汇聚为一个共振频率的规律。实验结果与理论分析吻合，所建理论模型能够准确描述整个共振系统的能量传输特性。结论可为优化磁耦合共振无线能量传输系统工作效率提供理论依据。
위료제고자우합공진계통적능량전수효솔，통과연구계통무선능량전수특성，탐색료계통전수효솔수우합거리변화적규률。기우이단구망락분석방법，건립료자우합공진무선능량전수적등효전로모형，구해출공진계통발생빈솔분차현상산생적조건이급최대효솔시적빈솔표체식。통과수치방진대공진계통전수특성진행료분석，게시료계통적고유공진빈솔회수착우합거리적증가，유량개상차교원적공진빈솔축점고근，직지과월림계조건，회취위일개공진빈솔적규률。실험결과여이론분석문합，소건이론모형능구준학묘술정개공진계통적능량전수특성。결론가위우화자우합공진무선능량전수계통공작효솔제공이론의거。
In order to improve energy transmission efficiency of wireless power system based on magnetic resonant coupling,the relationship between transmission efficiency and coupling distance is researched studying the transmission characteristics of wireless power system. The equivalent circuit model of wireless power transmission system via magnetic resonance coupling is analyzed contactless based on the two-port network analysis method. The condition of the resonant frequency splitting phe-nomenon is produced, a contactless power transmission system is deduced, and the frequency expression of maximum efficiency is derived. The transmission characteristics of this system are researched using numerical simulation. The law that two quite different resonant frequencies turn into one until the critical condition is revealed and resonant frequency is increased gradually with the coupling distance under the condition of optimum efficiency. Experimental results show that the transmission characteristics are consistent with theoretical analysis and simulation. The model can describe the transmission characteristics of the power transmission system accurately, and provide theoretical support for the magnetic resonant coupling system.