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http://dx.doi.org/10.6113/JPE.2010.10.1.001

A Novel Scheme for Sliding-Mode Control of DC-DC Converters with a Constant Frequency Based on the Averaging Model  

He, Yiwen (School of Electronic and Information Engineering, Tongji University)
Xu, Weisheng (School of Electronic and Information Engineering, Tongji University)
Cheng, Yan (School of Electronic and Information Engineering, Tongji University)
Publication Information
Journal of Power Electronics / v.10, no.1, 2010 , pp. 1-8 More about this Journal
Abstract
A new scheme for sliding-mode control (SMC) of DC-DC converters with a constant switching frequency is proposed. The scheme is based on the averaging model and the output signal of the controller is $d^+$ or $d^-$ instead of the on or off signal of a direct sliding-mode (SM) controller or the continuous signal d = $u_{eq}$ of an indirect SM controller. Two approaches using the new scheme are also proposed and the design procedures for a buck converter are given in detail. The first approach called constant $d^+$ and $d^-$ SMC is simple, cost effective and dynamically fast. In order to improve the dynamic characteristics of the reaching phase and to alleviate chattering, the second approach called reaching law SMC is also presented. Analyses and simulation results demonstrate the feasibility of the proposed scheme.
Keywords
DC-DC converter; Sliding mode control; Constant switching frequency; Averaging model; Reaching law;
Citations & Related Records

Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 9
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