基于并联永磁偏置可调电感的无线电能加密传输系统研究  

Research on Parallel Permanent Magnet Bias Variable Inductance for Wireless Power Encryption Transmission

作　　者：张建忠[1] 王丽 王政[1] ZHANG Jianzhong;WANG Li;WANG Zheng(Electricity Engineering College,Southeast University,Nanjing 210096,Jiangsu Province,China)

机构地区：[1]东南大学电气工程学院,江苏省南京市210096

出　　处：《中国电机工程学报》2023年第23期9242-9250,共9页Proceedings of the CSEE

基　　金：国家重点研发计划(2021YFB2500704)

摘　　要：无线电能传输效率受开关频率和谐振元件参数影响,利用调谐装置可避免非授权端窃电行为,实现电能加密传输,但传统磁心调节型电感调谐技术存在控制损耗大的问题。文中提出并联永磁偏置型可调电感设计方案,借助有限元仿真分析和相关实验验证,并联方案调节效率超过传统方案3倍,受主线圈影响波动范围不足传统方案20%,大幅提高可调电感性能。此外,基于谐振网络频率敏感性分析,设计并搭建一套基于并联永磁偏置型可调电感的无线电能加密传输系统,并在实验中将非授权端和窃电端的获取功率分别抑制到授权端的5%和10%以内,验证所提可调电感工作有效性和无线电能加密传输系统防窃电效果。The efficiency of wireless power transmission is influenced by switching frequency and resonant parameters.The adoption of tuning device may realize wireless power encryption transmission(WPET)and avoid power theft by unauthorized users.However,the traditional core regulated inductance tuning device has large control losses.Therefore,a parallel permanent magnet bias variable inductor(PMVI)is proposed in this paper.With finite element simulation analysis and related experimental verification,the regulation efficiency of the parallel scheme is more than 3 times that of the traditional scheme,and the fluctuation range affected by the main coil is less than 20%of the traditional scheme,which greatly improves the performance of the adjustable inductance.In addition,by analyzing the frequency sensitivity of resonant network,a set of WPET system based on PMVI is designed and built.The experiments of the WPET system show that the power of the unauthorized and stolen ends is suppressed to less than 5%and 10%of the authorized end respectively,which has proved the effectiveness of the variable inductor work and the anti-power-theft effect of the WPET system.

关 键 词：无线电能加密传输 电感调谐 有限元分析 频率敏感性 谐振网络 

分 类 号：TM724[电气工程—电力系统及自动化]