摘要
直流变换器一般具有非线性、多模态等特点。Buck-Boost变换器的建模是其闭环控制设计的关键,对于BuckBoost变换器输出可靠的电压和良好的动态响应特性具有非常重要的影响。本文是在Buck-Boost变换器断续模式的平均开关模型基础上建立其小信号交流模型,并推导出系统传递函数。在此基础上设计了电压闭环控制系统,进行了电压闭环参数设计的研究,实现了控制理论中零极点补偿法在电力电子中的应用。利用MATLAB软件进行仿真分析,验证了模型和闭环控制设计的正确性。
DC converter has the characteristics of nonlinear and multi modal .The model building of Buck-Boost converter is the key to design its closed-loop control system. The reliable output voltage and perfect dynamic characteristic of the Buck-Boost converter was greatly influenced by it. The AC small signal model is build on the basis of Buck-Boost converter,s average switch model. Then get the transfer function of system. The voltage loop was also designed based on it. The design details for voltage loop were given and zero-pole compensation method from classic control theory was applied to the field of power electronics. The design of closed-loop control system and the model were verified through the analysis of the result of simulation in MATLAB software.
出处
《电子设计工程》
2015年第21期148-150,154,共4页
Electronic Design Engineering
