磁耦合谐振式无线电能传输系统三线圈结构研究

Research on the three-coil structure of magnetically coupled resonant wireless power transmission system

针对带有中继线圈的磁耦合谐振式三线圈无线充电系统进行建模,分析建模结果发现系统的传输效率和输出功率会随着线圈之间耦合系数的变化而动态变化。使用ANSYS进行电磁仿真,分析三线圈无线电能传输系统在其他参数固定不变时,中继线圈纵向位置的改变对系统传输特性的具体影响。仿真结果表明,减少初始线圈与中继线圈之间的距离能够明显提高系统的传输效率,减少中继线圈与接收线圈之间的距离能够使系统获得较高的输出功率。

A magnetically coupled resonant three-coil wireless charging system with a relay coil was modeled.The analysis and modeling results show that the transmission efficiency and output power of the system will change dynamically with the change of the coupling coefficient among the coils.An electromagnetic simulation was performed using ANSYS to analyze the specific influence of the change of the longitudinal position of the relay coil on the transmission characteristics of the three-coil wireless power transmission system when other parameters were fixed.Simulation results show that reducing the distance between the initial coil and the relay coil can significantly improve the transmission efficiency of the system,and reducing the distance between the relay coil and the receiving coil can make the system obtain higher output power.