新型无线电能传输三维耦合机构的设计与优化

Design and optimization of novel three-dimensional coupling mechanism forwireless power transfer

为了进一步提高无线电能传输系统(WPT)的空间自由度,提出了一种新型类半球体状发射机构,从理论角度出发,利用互感叠加原理与等效电路模型分析了三维无线电能传输系统的特性;建立阵列式三维电能传输系统仿真模型,分析不同控制方式下的磁场分布规律,分别从距离特性与磁场分布研究系统传输性能,并搭建了无线电能三维传输实验系统,对该发射机构的传输性能进行验证。结果表明:新型结构最远可在400 mm处实现效率为19.2%的能量传输;在相同距离下,处于同一水平面的负载线圈在各方向接收功率最大效率偏差仅为8%,具有高均匀度磁场;该新型三维耦合机构具有空间高自由度、无方向性等良好的传输性能。

In order to further improve the space freedom of the wireless power transfer(WPT)system,a new semi-spheroid transmitting mechanism is proposed.From the theoretical point of view,the characteristics of three-dimensional(3D)WPT system are analyzed using mutual inductance superposition principle and equivalent circuit model.The simulation model of array 3D power transmission system is established,and the distribution of magnetic field under different control modes is analyzed.The transmission performance of the system was studied from the perspective of distance characteristics and magnetic field distribution,respectively.A three-dimensional wireless energy transmission experimental system is established to verify the transmission performance of the transmission mechanism.The results show that the new structure can achieve energy transfer with an efficiency of 19.2%up to 400 mm.At the same distance,the maximum efficiency deviation of the load coil receiving power in all directions on the same horizontal plane is only 8%,and it has a high uniformity magnetic field.The experimental results show that the new type of 3D coupling mechanism has good transmission performance such as high spatial freedom and directionless.