摘要
发射线圈和接收线圈之间的距离是设计无线电能传输系统的一个关键影响因素。距离的变化对于系统的输出功率和效率都会产生影响。先利用两线圈的互感耦合模型,从电路的角度计算出系统输出功率和效率与耦合系数的关系式再通过ansoft软件仿真得到距离和耦合系数的关系,从而得到最大功率点的位置及效率随距离变化的改变情况。最后,设计了相关的实验电路,实验结果与仿真、理论分析具有较好的一致性。这为设计磁耦合谐振式无线电能传输系统时选择合适的耦合系数提供了参考依据。
The distance between transmitting coil and receiving coil is the key factor for the design of wireless power transmission system. The output power and efficiency of system will be affected by the variation of the distance. In this paper,the relationship between coupling coefficient and the output power and efficiency of system is analyzed based on coupling model of two coils. Then the relationship between the distance and the coupling coefficient is simulated by ansoft software and the position of the maximum power point and the change of efficiency are obtained. Finally,equivalent circuit model is designed and experimental results are well consistent with the simulation,and theoretical analysis. It provides a reference for selecting the appropriate coupling coefficient when designing the magnetic resonances based wireless energy transfer system.
出处
《电气开关》
2016年第1期60-64,67,共6页
Electric Switchgear
