Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (2): 130-135,160.

• Power & Electrical Engineering • Previous Articles     Next Articles

Sliding-Mode Variable-Structure Control of CCM Buck Converter Based on Exact Feedback Linearization

Le Jiang-yuan1,2  Xie Yun-xiang1  Ji Yu-pi1  Zhang Zhi1   

  1. 1．School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China;  2．School of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,Jiangxi,China
  • Received:2010-08-09 Revised:2011-10-24 Online:2012-02-25 Published:2012-01-04
  • Contact: 乐江源(1975-) ，男，博士，副教授，博士，主要从事电力电子在电力系统中的应用、非线性系统控制研究． E-mail:jy.le@mail.scut.edu.cn
  • About author:乐江源(1975-) ，男，博士，副教授，博士，主要从事电力电子在电力系统中的应用、非线性系统控制研究．
  • Supported by:

    江西省教育厅青年科学基金资助项目( GJJ10237)

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Abstract:

Based on the differential geometry theory and the affine nonlinear model of Buck converters,the corresponding nonlinear coordinate change matrix and nonlinear state variable feedback equations are deduced,and an exact feedback linearization model is then established. The proposed model is used to design a sliding-mode variable-structure controller by selecting suitable linear switching function and exponential reaching law. It is shown by comparison that the proposed sliding-mode variable-structure control method based on exact feedback linearization is of high dynamic response performance,excellent steady-stage error-regulating characteristics and strong robustness.

Key words: DC-DC converter, sliding-mode variable-structure control, nonlinear control, exact feedback linearization