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.
出处
《电机与控制学报》
EI
CSCD
北大核心
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)
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
magnetic resonance
improved class E amplifier
passive compensation network
LEDdriver
constant-current design
