单电感双输出Buck变换器的非线性控制方法研究  

Research on nonlinear control method of single-inductor dual-output buck converter

作　　者：李畸勇[1] 冯端正 戈鑫 刘斌[1] 郑一飞 LI Ji-yong;FENG Duan-zheng;GE Xin;LIU Bin;ZHENG Yi-fei(School of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2022年第5期1209-1219,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(61863003)。

摘　　要：为了减小单电感双输出Buck变换器输出支路间的交叉影响,提出了基于精确反馈线性化的滑模变结构控制。以工作于电感电流连续导电模式的单电感双输出Buck变换器为研究对象,介绍了其工作原理和开关状态,建立了仿射非线性模型,在此基础上,将滑模变结构控制应用于精确反馈线性化控制,得到系统的非线性控制律,弥补了精确反馈线性化对精确数学模型依赖的缺陷,提高了系统鲁棒性。仿真结果表明,所提控制方法比传统的峰值电流型控制方法具有更好的调节性能,并能有效地减小系统的交叉调节。最后,由设计的实验电路进一步验证了所提控制方法的正确性和有效性。In order to reduce the cross regulation between the output branches of single-inductor dual-output buck converter,a sliding mode variable structure control based on exact feedback linearization was proposed.This paper studied the SIDO Buck converter in continuous conduction mode,the operation principle and switch states were analyzed,and the affine nonlinear model was established,on this basis,the sliding mode variable structure control was applied to exact feedback linearization control to obtain the nonlinear control law of the system,which made up for the defect that the exact feedback linearization depends on the precise mathematical model and improved the robustness of the system.Simulation results show that the proposed control strategy has better regulation performance than the traditional peak current mode control strategy,and can effectively reduce the cross regulation of the system.Finally,the correctness and effectiveness of the proposed control strategy are further verified by the designed experimental circuit.

关 键 词：单电感双输出 交叉影响 精确反馈线性化 滑模变结构控制 连续导电模式 

分 类 号：TM46[电气工程—电器]