摘要
讨论了电动汽车(electric vehicle,EV)无线充电系统中,在最优负载电阻的前提下,无线能量传输(wireless power transfer,WPT)电路的分频现象。在最优化的WPT电路中,通过改变充电系统中主从线圈间耦合系数(k)的值,电路将会产生3个零电抗频率(zero reactance frequency,ZRF)点,进而产生分频现象。通过对ZRF点进行自适应频率选择,可使整个电路系统在高能量传输效率的前提下,其输出功率达到最大。
The frequency division phenomenon of the wireless power transfer(WPT)circuit in the electric vehicle wireless charging system under the premise of the optimal load resistance was discussed.In the optimized WPT circuit,by changing the value of the coupling coefficient(k)between the master and slave coils in the charging system,three zero reactance frequency(ZRF)points would be generated in the circuit,and then frequency division was generated.Through the adaptive frequency selection of the ZRF point,the output power of the entire circuit system can be maximized under the premise of high energy transmission efficiency.
作者
刘鸿
徐诗豪
杨凌升
LIU Hong;XU Shihao;YANG Lingsheng(School of Electronic and Information Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,Jiangsu,China)
出处
《电气传动》
2023年第1期39-44,90,共7页
Electric Drive
基金
昆山&南京信息工程大学智能传感研究中心项目(KX201908310001)。
关键词
无线充电
最优负载
零电抗频率
频率选择
wireless charging
optimal load
zero reactance frequency(ZRF)
frequency selection
