摘要
针对DC/DC开关变换器工作点宽范围变化的情况,利用变换器凸多面体建模的方法,提出一种开关变换器凸多面体控制器结构。利用凸多面体建模的思路,将变换器工作区域划分为多个子区域,并用工程化小信号建模思想对各子区域进行建模,将各子工作区域进行加权,进而完成整个工作区域的建模。基于凸多面体模型,提出一种凸多面体控制器结构,以Buck变换器为例进行仿真和实验。分析结果表明,凸多面体控制器能够保证变换器对工作点信息的快速跟踪,提高了变换器的稳态性能与动态性能。仿真结果和实验结果均验证了所述方法对变换器建模的正确性,同时验证了该控制器的优越性和有效性。
Aiming at the varying operating point problem for the DC/DC switching converter, a polytopic controller structure is proposed based on the polytopic model of the switching converter. Firstly, using the polytopic modeling method of the switching converter for varying operating point conditions, the overall operating space ws divided into many subspaces and then local modeling was made for each subspace, and these local models were integrated into a polytopic model for the complete operating space. Moreo- ver, a polytopic controller structure was proposed based on the polytopic model and a Buck converter was taken as the object of study. Finally, the correctness and validity of the presented controller structure were verified by both simulations and experimental results. The polytopic controller structure ensures the fast tracking of the converter operating point information to improve the steady-state response and dynamic response of the switching converter.
出处
《电机与控制学报》
EI
CSCD
北大核心
2013年第2期55-62,共8页
Electric Machines and Control
基金
国家自然科学基金重点项目(51137006)
国家重点实验室自主研究项目(2007DA10512711210)
研究生科研创新基金资助项目(CDJXS11151151)
关键词
变工作点
凸多面体建模
开关变换器
稳定性控制
凸多面体控制器
operating point variations
polytopic model
switching converters
stability control
polytopiccontroller
