Robust Discrete Integral Sliding Mode Control for Buck Converters

被引：0
|
作者：
Zheng C. [1 ]
Zhang J. [1 ,2 ]
Xu R. [1 ]
Zhang G. [1 ]
机构：
[1] College of Information and Control Engineering, China University of Petroleum (East China), Qingdao
[2] School of Mechanical and Electrical Engineering, Qingdao Huanghai University, Qingdao
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 20期
关键词：
Buck converter; Discrete integral sliding mode; Disturbance estimation; Robust control;
D O I：
10.19595/j.cnki.1000-6753.tces.181233
中图分类号：
学科分类号：
摘要：
The conventional PI voltage control of buck converter cannot obtain satisfying dynamic responses and anti-disturbance ability under parameter variations and load disturbances. Moreover, the traditional sliding mode control is often designed based on continuous-time voltage single loop, resulting in discretization stability problems and poor voltage dynamic performance in comparison to double closed-loop control. Thus, this paper proposes a robust discrete integral sliding mode (DISM) voltage control scheme for Buck converters. Firstly, a discrete voltage model with lumped disturbance is rebuilt while preserving the current inner loop in the traditional double closed-loop control, and a novel global-robustness DISM voltage controller is designed to improve the dynamic quality and anti-disturbance ability of the output voltage. Then, a 'delay disturbance estimation' strategy is used to estimate and compensate the lumped disturbance online, achieving the engineering implementation of the controller and the chattering suppression of sliding mode control. Finally, the stability analysis and parameter design procedures of the proposed controller are given. Its superiority is verified by comparative simulations and experiments with conventional PI voltage control. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：4306 / 4313
页数：7
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