摘要
为了降低无线电能传输系统(WPT)的复杂度,设计了一款自激式逆变电源,无需数字控制器和脉冲宽度调制(PWM)信号发生器即可实现开关管的零电压开通和零电压关断,同时具有频率跟踪功能,极大地简化了逆变电源的设计。同时,为了避免WPT系统的发射回路在互感M=0的情况下出现串联谐振短路的问题,采用并-串型(PS)型拓扑来设计WPT装置,同时可以使WPT系统具有恒压输出特性。详细分析自激逆变器和PS型WPT系统的工作原理,通过仿真分析证明了自激逆变电路的有效性以及PS型系统的恒压输出特性。实验结果显示,在传输距离为7cm的情况下,当负载电阻变化200%时,WPT系统的输出电压变化率仅为2.6%,表明所设计的PS型WPT系统的输出电压对负载变化有较强的鲁棒性。
To decrease the complexity of the wireless power transfer(WPT) system, a novel self-excited inverter was proposed to design the AC power source. The self-excited inverter could realize the self-drive and soft-switching of the MOSFETs as well as the frequency tracking function without PWM generator and digital signal processor, which greatly simplified the structure of the AC source. In a WPT system, the series LC transmitter would exhibit a series resonant short circuit with a mutual inductance of M=0. Thus, the parallel-series(PS) topology was utilized and the constant voltage(CV) output characteristic of WPT system could be achieved. The working principles of the PS WPT system and the self-excited inverter were provided. The simulation results verified the self-excited inverter and the constant voltage output characteristic of the PS WPT system. The experimental results show that when the transmission distance is 7 cm and the load resistor changes by 200%, the output voltage only fluctuates by 2.6%, which indicates that the output voltage of the PS WPT system is robust to load changes.
作者
王尧
刘卫国
皇甫宜耿
刘云天
Wang Yao;Liu Weiguo;Huangfu Yigeng;Liu Yuntian(Shaanxi Key Laboratory of Small&Special Electrical Machine and Drive Technology School of Automation Northwestern Polytechnical University,Xi’an 710129 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第22期4751-4760,共10页
Transactions of China Electrotechnical Society
基金
西北工业大学研究生创意创新种子基金项目资助(ZZ2018023)
关键词
无线电能传输系统
自激逆变器
并-串联型拓扑
恒压输出特性
Wireless power transfer system
self-excited inverter
parallel-series topology
constant voltage output characteristic
