感应式无线电能传输系统电能与信息同时传输

Simultaneous Transmission of Power and Information in an Inductively Coupled Wireless Power Transfer System

在电磁感应耦合式无线电能传输系统中,为得到更好的电能传输效果,大多采用闭环控制。因此,次级信息的获得是必要的。所谓次级信息,是指负载的充电状态。这里用同一套传输机构实现电能和信息的同时传输,而无需增加额外的通信模块。电能接收器利用电容调制方式改变系统的补偿电容比,使初级线圈的电压幅值按一定规律变化,将次级信息发送到初级;电能发射器对初级线圈电压进行采样、检波、滤波、比较等处理,提取出次级发送的信息。实验结果表明,提出的设计方案正确,制作完成的样机实现了电能和信息的稳定传输。

In an inductively coupled wireless power transfer system, the closed-loop control is usually used to get better effect of power transfer.Thus ,it＇s necessary to obtain the secondary information.The secondary information refers to the voltage, state of charge, etc. of the load.The simultaneous transmission of power and information is achieved by using the same coils instead of additional communication modules.The power receiver uses capacitance modulation to change the capacitance ratio of the primary to the secondary, making the voltage amplitude of the primary coil to change with certain rules, thus sending secondary information to the primary side.The power transmitter samples the voltage of primary coil,and extracts the information transmitted after detecting,filtering and comparing.Experimental results show that the proposed design is correct, and the prototype can transmit power and information in stable.