磁耦合谐振无线电能传输系统中继结构的研究

针对具有中继结构的磁耦合谐振无线电能传输系统进行了系统分析,首先建立系统理论模型,利用耦合模理论对中继系统的功率模型进行分析,得出中继系统的功率与非中继系统的功率具有相同的变化规律.利用电磁仿真软件分析系统在中继线圈工作状态下的磁场分布情况,分析中继系统的电路模型,获得负载电压比,提出中继系数的概念,推导出负载电压比和中继系数的变化关系.并根据系统负载电压的等效关系,推导出中继系数变化模型,求得中继线圈的合理位置范围.最后通过实验验证了该模型的准确性.

Study on Relay Structure for Wireless Power Transmission System via Electromagnetic Resonant Coupling

In order to analyze the transmission efficiency of wireless power transmission system via electromagnetic resonant coupling with relay structure， the relay system model was set up and analyzed with couple mode theory. In addition， the same power change rule compare with non-relay system was derived out. Take advantage of electromagnetic simulation software to make a system analyze with the magnetic field distribution of the power transmission system， and to analyze the circuit model of relay system to get the load power ratio， the motion as relay coefficient was proposed. In this way， the relationship between the load voltage ratio and relay coefficient was derived out. According to equivalent relation of load voltage， the model of relay coefficient was obtained， which could calculate reasonable relay coefficient. Finally， the accuracy of this model was verified by the experimental results.