电流跟踪数字控制的Buck DC-DC变换器  

A Current Following Digital Controlled Buck DC-DC Converter

作　　者：刘健[1] 程红丽[1] 王立[1] 冷朝霞[2] 

机构地区：[1]西安科技大学电气与控制工程学院,西安710054 [2]西安理工大学自动化与信息工程学院,西安710048

出　　处：《电工技术学报》2011年第8期50-56,63,共8页Transactions of China Electrotechnical Society

基　　金：新世纪优秀人才支持计划资助项目(NCET050875)

摘　　要：为了改善Buck DC-DC变换器的性能,提出了一种基于微处理器的电流跟踪数字控制方法,根据输出电流和输出电压的采样信息,计算出所需要的输出电流,并将电感电流控制在该输出电流的一个滞环宽度之内。详细分析了负载突变和启动过程中输出电压的动态响应,给出了参数选择和设计考虑。以一个电流跟踪控制的Buck DC-DC变换器为例说明了所提出的方法并进行了实验研究,实验结果表明了电流跟踪控制的可行性和理论分析的正确性。To improve the behaviors of Buck DC-DC converters,a current following digital control approach based on micro-processor is put forward.The output current and the output voltage are measured,based on which,the inductor current to make the output voltage to be the desired value is calculated and is controlled to a narrow range around it.The dynamic performance in case of the load changing and starting period is analyzed.The design considerations are given.Experiments are made on a current following controlled Buck DC-DC converter,the results of which show that the proposed approach is feasible and the analysis is correct.

关 键 词：数字控制 DC-DC变换器 BUCK DC-DC变换器 设计 

分 类 号：TM46[电气工程—电器]