IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Parameters design of a sliding mode controller with a hysteresis band for buck converters in continuous and discontinuous conduction modes
Wu ChenLi YinghuiLin MaoLi Zhe
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JOURNAL FREE ACCESS

2016 Volume 13 Issue 13 Pages 20160448

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Abstract

In this paper, a parameter design method of a sliding mode controller with a hysteresis band is proposed for buck converter application, which is based on the proper analysis of the controller parameters’ influences on existence condition, conduction mode and transient performance. This work discovers the fact that the trajectory of the closed loop system will end at an undesired limit cycle or equilibrium in discontinuous conduction mode, and establishes the mathematical relationship between the system overshoot and the sliding coefficient α. Next, in order to keep operating in continuous conduction mode and have a superior steady-state and transient performance, the upper limit of the hysteresis band border δ, the upper and lower limit of α are given accordingly. Finally, The effectiveness of the given design method is validated by simulation and experiment for steady-state and transient responses.

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© 2016 by The Institute of Electronics, Information and Communication Engineers
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