摘要
在无线电能传输(Wireless Power Transmission,WPT)系统的应用中,负载的变化会导致系统输出电压不稳定且效率降低。针对这一问题,设计了一种基于阻抗匹配技术实现最高效率跟踪和基于移相控制实现恒压输出的复合控制方法。首先分析系统的效率,推导出最优负载条件,通过调节Buck占空比跟踪最优负载;其次通过PID控制算法改变逆变器移相角,保证输出电压的稳定;最后利用PSIM软件搭建仿真平台进行验证。实验结果表明,该方法在一定负载变化范围内能实现恒压输出且系统效率受负载影响较小。
In the application of Wireless Power Transmission(WPT)systems,changes in the load will cause the system’s output voltage to be unstable and the efficiency to decrease.In response to this problem,a composite control method based on impedance matching technology to achieve the highest efficiency tracking and phase shift control to achieve constant voltage output is designed.Firstly,analyze the efficiency of the system,derive the optimal load conditions,and track the optimal load by adjusting the Buck duty cycle.Secondly,use the PID control algorithm to change the phase shift angle of the inverter to ensure the stability of the output voltage.finally use the PSIM software to build a simulation platform authenticating.Experimental results show that this method can achieve constant voltage output within a certain range of load changes and the system efficiency is less affected by the load.
作者
夏振林
李志忠
XIA Zhenlin;LI Zhizhong(School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China)
出处
《通信电源技术》
2021年第18期1-4,共4页
Telecom Power Technology
基金
广东省省级科技计划(产学研)项目(2016B090918031)。
关键词
无线电能传输
阻抗匹配
移相控制
效率跟踪
Wireless Power Transmission(WPT)
impedance matching
phase shift control
efficiency tracking
