半桥LLC谐振变换器参数设计与验证  

作　　者：张国超 刘桂礼[1] 

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192

出　　处：《科技创新与应用》2021年第25期28-31,共4页Technology Innovation and Application

摘　　要：文章针对半桥LLC谐振变换器设计参数设计困难的问题,分析了其拓扑结构,对它的工作模式进行了简单分析,并用基波分析法建立等效模型,得到其归一化增益函数,并用MATLAB绘制出其归一化直流增益曲线,用控制变量法分析了不同品质因数下与不同电感比下的增益曲线。通过参数分析与优化找到确认开关管ZVS和副边整流二极管ZCS的条件,用saber软件进行电路参数仿真确认,并通过样机进行试验,验证了其正确性,对于LLC开关电源的发展,有着积极意义。Aiming atthe LLC resonant converter with half bridge is difficult to design,analyzed its topological structure,its working mode is simply analyzed,the equivalent model is established with the fundamental wave analysis method,the normalized gain function is obtained,and the normalized DC gain curve is drawn with MATLAB,and the gain curve under different quality factors and different inductance ratio is analyzed with the control variable method.Through parameter analysis and optimization,the conditions of switch ZVS and secondary rectifier diode ZCS are found and confirmed.The circuit parameters are simulated and confirmed by saber software,and the correctness is verified by the test of the prototype.It has positive significance for the development of LLC switching power supply.

关 键 词：LLC谐振变换器 基波分析法 直流增益曲线 SABER 

分 类 号：TM93[电气工程—电力电子与电力传动]