无线电能传输变频控制方法及系统设计

Wireless power transmission frequency conversion control method and systematic design

为了应对无线电能传输技术由于系统成本高、传输效率低等原因造成普及速度缓慢的问题,设计了一种基于变频功率控制的无线电能传输系统,具有根据负载功率自动调整传输功率,自动识别接收端并根据负载电流自动进入恒流充电、恒压供电状态。对系统方案及变频功率控制原理进行介绍,对系统电路实现及元器件选型等关键问题进行说明,对影响传输效率的因素进行了理论分析和实验测试。通过实验数据,给出了传输效率与负载功率、线圈间距和谐振频率之间的关系,验证了使用变频式功率调节对系统传输效率影响较小,系统方案可行。

In order to deal with the slow popularization speed of wireless power transmission technology caused by high system cost and low transmission efficiency, A wireless power transmission system based on variable frequency power control which can automatically adjust the transmission power according to the load power, can automatically identify the receiving end and can automatically enter the constant current charging state and the constant voltage power supply state according to the load current is designed. The system scheme and the principle of frequency conversion power control is introduced, some key problems of system circuit realization and component selection are explained and theoretical analysis and experimental tests on factors influencing transmission efficiency are conducted. The relationship between transmission efficiency and load power, coil spacing and resonant frequency is concluded based on the analysis of experimental data. That the use of variable frequency power regulation has little impact on the transmission efficiency of the system, and that the system scheme is feasible are verified.