变频控制LLC谐振恒流变换器研究  

Research on LLC Resonant Converter of Variable Frequency Control Constant Current

作　　者：王金玉[1] 吕鹏 WANG Jinyu;LU Peng(School of Electrical and Information Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318

出　　处：《吉林大学学报（信息科学版）》2023年第2期242-250,共9页Journal of Jilin University（Information Science Edition）

摘　　要：为探索LED(Light Emitting Diode)驱动的方法,以期提高LED输出亮度的稳定性,针对其控制恒流输出的问题提出了变频控制的LLC谐振变换器。设计的LLC半桥型谐振变换器具有开关工作频率高、掉电保持、允许输入电压范围宽、效率高、重量轻、体积小、 Electromagnetic Interference噪声小和开关应力小等优点,所以其是LED恒流输出很好的拓扑选择。采用变频控制方法,结合Power Simulation软件进行了仿真分析,仿真结果表明,变频控制的LLC谐振变换器具有良好的稳态性能和瞬态性能,对工程应用具有实际意义。In order to explore the driving method of LED(Light Emitting Diode),to improve the stability of LED output brightness,a LLC resonant converter controlled by frequency conversion to control the constant current output is proposed.LLC half-bridge resonant converter has the advantages of high switching frequency,power-off retention,wide allowable input voltage range,high efficiency,light weight,small size,low EMI(Electromagnetic Interference)noise,low switching stress,etc.Therefore,LLC half-bridge resonant converter is a good topology choice for LED constant current output.And the frequency conversion control method is adopted and the simulation analysis is carried out with PSIM(Power Simulation)software.The simulation results show that the LLC resonant converter controlled by frequency conversion has good steady-state performance and transient performance,which also has far-reaching significance for engineering applications.

关 键 词：LED驱动 恒流输出 LLC谐振变换器 变频控制方法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TM921[自动化与计算机技术—计算机科学与技术]