单级高增益LED驱动电路和融合可见光通信调制的控制策略  

Single-stage High Gain LED Driver and Combined Visible Light Communication Modulation Strategy

作　　者：萧展涛 林维明[1] 朱逸 XIAO Zhantao;LIN Weiming;ZHU Yi(Fujian Key Laboratory of New Energy Generation and Power Conversion(Fuzhou University),Fuzhou 350108,Fujian Province,China)

机构地区：[1]福建省新能源发电与电能变换重点实验室(福州大学),福建省福州市350108

出　　处：《中国电机工程学报》2023年第23期9262-9272,共11页Proceedings of the CSEE

摘　　要：针对传统通信射频放大器存在成本高、效率低等问题,提出一种单级AC-DC高增益降压LED驱动电路和融合可见光通信调制的控制策略,满足低压输出的LED照明和可见光通信场合。提出的单级电路由结合开关电容网络的低纹波降压Cuk电路和同步整流Buck电路集成。融合可见光通信调制的控制策略以通信二进制相移键控技术为理论基础,通过调节输出电流平均值控制LED照明水平,利用输出电流纹波相位变化实现数据通信调制。对提出的电路和融合控制策略进行详细分析,进行电路关键参数设计。最后通过计算机仿真验证,并研制一台输入185~265 VRMS、恒流输出1A/25W的实验样机。仿真和实验结果表明,电路获得了较高降压增益,实现了融合LED照明恒流控制和可见光通信调制功能,验证了所提出的电路和融合可见光通信调制控制策略的有效性。Aiming at the traditional communication RF amplifiers problems such as high cost and low efficiency,a single-stage AC-DC high gain step-down LED driver and its hybrid visible light communication(VLC)modulation control strategy are proposed to meet low-voltage output and VLC of LED applications.The low-ripple step-down Cuk combined switched capacitor(SC)and synchronous rectification(SR)Buck are integrated into a single-stage driver.The hybrid VLC control strategy is based on the theory of binary phase shift keying(BPSK),the LED lighting level is controlled by the average output current,and the data communication modulation is realized by the phase change of the output current ripple.The proposed circuit and hybrid control strategy are analyzed in detail,and the key parameters of the proposed circuit are designed.Finally,the computer simulation is carried out,and an input of 185~265VRMS and constant current output of 1A/25W experimental prototype is set up.The simulation and experimental results have been obtained to show that the circuit can realize high gain step-down,the functions of hybrid LED lighting control and VLC modulation,which verifies the effectiveness of the proposed driver and hybrid VLC modulation control strategy.

关 键 词：LED驱动电路 可见光通信 单级高增益Cuk/Buck电路 BPSK调制 融合控制策略 

分 类 号：TM46[电气工程—电器]