基于DC/DC电路的无线充电系统功率稳定控制方法  

Power stability control method of wireless power transfer system based on DC/DC circuit

作　　者：杨晓梅 王金虎 费益军 翟学锋[2] 王成亮[2] 张铭 YANG Xiaomei;WANG Jinhu;FEI Yijun;ZHAI Xuefeng;WANG Chengliang;ZHANG Ming(State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China;Jiangsu Fangtian Power Technology Co.,Ltd.,Nanjing 211102,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]国网江苏省电力有限公司,江苏南京210024 [2]江苏方天电力技术有限公司,江苏南京211102 [3]东南大学电气工程学院,江苏南京210096

出　　处：《电力工程技术》2019年第6期173-178,共6页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(51877036)

摘　　要：在无线电能传输系统中,负载的接收功率对发射线圈与接收线圈之间的互感与负载阻值的变化比较敏感,当接收线圈与发射线圈之间出现偏移或负载等效阻抗变化时,需要通过有效的控制方法较快地保持负载接收功率基本稳定。文中在分析次级侧包含DC/DC电路的无线电能传输系统结构的基础上,给出了互感与负载电压、负载电流之间的关系,并推导出了DC/DC电路的占空比与负载接收功率之间的关系;然后提出通过检测负载电压、电流,调节DC/DC电路的输出功率稳定控制策略;最后,通过Matlab/Simulink仿真以及样机实验,验证了文中理论分析与控制策略的有效性和正确性。In the wireless power transfer(WPT)system,the received power of the load is sensitive to the change of mutual inductance and resistance.When there is deviation between the receiving coil and the transmitting coil or the change of load equivalent impedance,the received power of the load should be basically stable through effective control.Based on the analysis of the WPT system with DC/DC circuit in the secondary side,the relationship between mutual inductance and load voltage and current,as well as the relationship between duty cycle of DC/DC circuit and load power are given.The stable control strategy of output power by detecting load voltage and current and then adjusting DC/DC circuit is proposed.Finally,through Matlab/Simulink simulation and the establishment of the experimental platform,the paper verifies the effectiveness and correctness of the theoretical analysis and control strategy in this paper.

关 键 词：无线电能传输 功率稳定 DC/DC电路 位置偏移 等效阻抗 

分 类 号：TM72[电气工程—电力系统及自动化]