数字电流滞环控制的Buck-BoostDC/DC变换器  

A Digital Current Following Controlled Buck-Boost DC/DC Converter

作　　者：程红丽[1] 强新娟[1] 刘健[1,2] 

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710054 [2]陕西电力科学研究院,陕西西安710054

出　　处：《电力电子技术》2010年第12期56-58,共3页Power Electronics

基　　金：新世纪优秀人才支持计划资助项目(NCET050875)~~

摘　　要：基于Buck-Boost DC/DC变换器,提出了一种数字电流滞环控制方法,根据输入输出电压、输出电流的采样信息及输出电压偏差反馈增益,计算出所需平均电感电流,并将电流控制在该平均电感电流的一个滞环宽度内。详细分析了负载突变和启动过程中输出电压的动态响应,给出了参数选择及设计过程,经实验验证了输入电压及负载对输出电压的影响,结果证明了该控制方法的可行性和理论分析的正确性。This paper presents a digital current following control based on Buck-Boost DC/DC converter.The output current,the output voltage and the input voltage are measured,based on which,and according to the gain of the feed back voltage basis,the desired averaged inductor current is worked out and the inductor current is controlled to a narrow range around it.The dynamic performance in case of the load changing and the starting period is analyzed.The design considerations are given and illustrated the process.The experiments verify the influence on the output voltage when the input voltage and the load suddenly changes,and the result shows that the control method is feasi-bile and the analysis is correct.

关 键 词：变换器 数字控制 电流滞环 

分 类 号：TM46[电气工程—电器]