基于磁场耦合共振的自适应无线充电器研究

摘要

In view of the development of the wireless charger which belongs to the initial stage of the study,the model of the mutual inductance coupling resonance is analyzed in this paper.The normalized voltage expression is obtained by the circuit analysis,and the effective transmission distance and frequency characteristics of the transmission model are analyzed based on the normalized voltage expression.Through the optimization of circuit design,the efficiency of transmission is achieved.Through a series of experimental data,the design of the program,the correctness and effectiveness of the analysis.%针对目前在国内属于研究初始阶段的穿戴设备的无线充电器的开发，首先对无线电能传输的互感耦合共振的模型进行分析。从电路角度对互感耦合模型的工作原理进行系统的分析。通过电路分析得出的归一化电压表达式，并基于归一化电压表达式，对传输模型的有效传输距离和频率特性进行分析。通过一系列的实验数据，对设计的方案进行正确性和有效性的分析。通过红外测距，把红外测距的数据经过处理器处理，可以调节相应的充电器的参数，通过控制器打开多路开关选择发射和接收线圈的匝数，就可以在距离改变的时候实现自适应的调整，从而提高电能传输效率。为小功率无线穿戴设备的充电设备的开发，提供相应参考。