基于-Δ调制器的CCM Buck变换器滑模控制*

作者：熊远生1,2,俞立1,徐建明1,南余荣1 日期：2009-08-18/span> 浏览：3807 查看PDF文档

基于-Δ调制器的CCM Buck变换器滑模控制*

熊远生1,2,俞立1,徐建明1,南余荣1
(1.浙江工业大学 信息工程学院,浙江 杭州 310032; 2.嘉兴学院 机电工程学院,浙江 嘉兴 341001)

摘要：针对常规滑模控制方案应用于电流连续型(CCM)Buck变换器中，存在开关频率不固定及电感启动电流过大等问题，对电流连续型Buck变换器建立了仿射非线性模型，在-Δ(sigmadelta)调制器的基础上，选定反映控制目的的合适滑模面后，设计了指数趋近律的滑模控制器。仿真结果表明，采用该滑模控制的电流连续型变换器具有固定的开关频率，并且启动时间和电感启动电流可通过调节滑模控制器中的控制参数进行调整。
关键词：-Δ调制器;滑模控制;电力电子;Buck变换器;电流连续型
中图分类号：TM46文献标识码：A文章编号：1001-4551(2009)07-0008-03

Sliding mode controller for CCM Buck converters based on -Δ modulator
XIONG Yuansheng1,2, YU Li1, XV Jianming1, NAN Yurong1
(1.College of Information Engineering, Zhejiang University of Techonology, Hangzhou 310032, China;
2.College of Mechanical & Electrical Engineering, Jiaxing University, Jiaxing 341001, China)
Abstract: Aiming at the unfixed switch frequency and the big startup current of inductor in the general sliding mode control schemes for current conduction mode (CCM) Buck converters, an affine nonlinear model was established for Buck converter working on CCM. Based on the -Δ modulator, the sliding mode controller of exponential approach law was designed, after the fit surface was chosen for the control movie. The simulation results indicate that CCM Buck converter which adopted the sliding mode controller has the fix switch frequency. Furthermore, the startup time and the startup current of inductor can be adjusted with changing the control parameters in the sliding mode controller.
Key words: -Δ modulator; sliding mode control; power electronics; Buck converter; current conduction mode (CCM)
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