隔离型非理想DCM反激变换器的建模分析  

Modeling and analysis of isolated non-ideal DCM flyback converter

作　　者：王向宇 刘国宏 张逸凡 刘东立 WANG Xiangyu;LIU Guohong;ZHANG Yifan;LIU Dongli(School of Electrical and Control Engineering,Heilongjiang University of Science and Technology,Harbin 150027,China;Dongxin Oil Production Plant of Sinopec Shengli Oilfield Company,Dongying 257000,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150027 [2]中国石化胜利油田分公司东辛采油厂,山东东营257000

出　　处：《黑龙江电力》2022年第2期142-148,共7页Heilongjiang Electric Power

基　　金：黑龙江省大学生创新创业训练计划项目(项目编号:202010219004)。

摘　　要：基于隔离型非理想DCM反激变换器的工作原理,利用平均开关模型对变换器进行建模分析,建立反激变换器的小信号等效模型,考虑非理想情况下输出滤波电容内阻的影响,求解DCM下非理想反激变换器控制到输出的传递函数。结合工程实际的隔离反馈原理,以光耦合器和TL431为核心建立相应的Ⅱ型补偿网络对反激变换器进行补偿。通过仿真分析和样机试验测试,验证了隔离型非理想反激变换器经过设计的补偿网络进行补偿后具有良好的动态和稳态性能。Based on the working principle of the isolated non-ideal DCM flyback converter,the average switching model was used to model and analyze the converter,and the small signal equivalent model of the fly-back converter was established.Considering the influence of the internal resistance of the output filter capacitor in the non-ideal case,the transfer function from the control to the output of the non-ideal flyback converter in DCM was solved.Combined with the isolation feedback principle of engineering practice,the corresponding typeⅡcompensation network was established with optical coupler and TL431 as the core to compensate the flyback converter.Through simulation analysis and prototype test,it is verified that the isolated non ideal flyback converter has good dynamic and steady-state performance after compensation by the designed compensation network.

关 键 词：平均开关模型 DCM 反激变换器 补偿网络 

分 类 号：TM911[电气工程—电力电子与电力传动]