E类源磁谐振无线驱动LED系统的恒流设计  

Constant-current design for class E powered magnetic resonance wireless power transmission LED system

作　　者：卢伟国[1] 夏艳 李惠荣 刘黎辉 周雒维[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电机与控制学报》2018年第1期1-7,共7页Electric Machines and Control

基　　金：中央高校基本科研业务费专项资金项目(CDJZR10150010)

摘　　要：采用E类放大器的磁谐振方式无线驱动LED系统中,由于前端E类放大器对末端负载变化敏感,而影响LED负载的恒流驱动特性。基于此,首先通过引入改进E类放大器实现其恒压输出特性,进一步在线圈传输网络的输出侧增加无源补偿网络,设计其输出阻抗近似为无穷大,以实现LED负载的恒流驱动。无源补偿网络采用二端口传输矩阵法设计其输出阻抗,并根据设计条件确定出相应的电路结构及参数。最后考虑了在寄生参数影响的情况下,对磁谐振无线电能驱动LED系统的传输特性进行了分析,并通过仿真和实验验证了该系统恒流设计方法的有效性。In a LED powered magnetic-resonance wireless power transfer （ WPT） system, due tsitivity of tlie front-end class E amplifier to its load, it would afect constant-current characteristic of tlieLED load. Regarding this issue, an improved class E amplifier was introduced tvoltage output. Furthermore a passive compensation network was added in output side of the receiving coil, and its output impedance was signed approximately infinity so as to achieve constant-current opera-tion for tlie LED load. The concerned system was analyzed using the two-port transfer matrix method, andcircuit structure and parameters of the passive compensation network were determined. Finaiy, consider-ing the case of parasitic parameters, the transmission characteristics of LED powered magnetic resonanceWPT system were analyzed, and some simulation and experimental results verify the validiposed constant-current design scheme.

关 键 词：磁谐振 改进E类放大器 无源补偿网络 LED驱动 恒流设计 

分 类 号：TM13[电气工程—电工理论与新技术]