无线电能传输系统恒流输出控制方法研究  

Research on the Constant Current Output Control Method of Wireless Power Transfer System

作　　者：王旭[1] 郭彦杰 王瑞民 薛明 WANG Xu;GUO Yan-jie;WANGRui-min;XUE Ming(State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学,省部共建电工装备可靠性与智能化国家重点实验室,天津300401

出　　处：《电力电子技术》2024年第6期99-101,140,共4页Power Electronics

基　　金：国家自然科学基金(52077153);河北省省级科技计划(225676163GH)。

摘　　要：此处提出了一种发射端控制的无线电能传输(WPT)系统输出恒流调节方法。该方法无需在接收端增加传感器和无线通信装置,即可实现对系统输出电流的调节,因此,能够减小接收端体积和重量。首先,建立WPT系统等效电路模型,考虑整流电路等效输入阻抗的电阻和电感分量,推导得到发射端电压/电流与负载电流之间的量化关系;然后,采集发射端并联电容电压有效值和输入直流电流值,并通过逆变器移相控制,实现系统恒流输出;最后,搭建WPT实验台架,实验结果表明:在变负载工况下,恒流控制精度在3%以内,动态调节时间小于200ms,从而实现了负载电流快速、精准的调节。An output constant current regulation method for wireless power transfer(WPT)system is presented,which is controlled in the primary side.It can adjust the system output current without adding extra sensors and wireless communication devices in the secondary side.Therefore,the volume and weight of the secondary side can be reduced.Firstly,the equivalent circuit model of the WPT system is established,and the resistance and inductance components of the rectifier equivalent input impedance are considered,and the quantitative relationship between the voltage/current in the primary side and the load current is derived.Then,RMS values of the primary side parallal capacitor voltage and the input DC current value are measured,and system constant current output is achieved by the phase shift control of the inverter.Finally,a WPT experimental platform is built,and the experimental results show that under the conditions of load variation,constant current control accuracy is within 3%,and the dynamic adjustment time is less than 200 ms,and fast and precise regulation of the load current is achieved.

关 键 词：无线电能传输 移相控制 恒流调节 

分 类 号：TM724[电气工程—电力系统及自动化]