Open AccessDesign and implementation of an observer controller for a buck converter
Author(s) -
Shenbaga LAKSHMI,
T. Sree Renga Raja
Publication year - 2014
Publication title -
turkish journal of electrical engineering and computer sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.225
H-Index - 30
eISSN - 1303-6203
pISSN - 1300-0632
DOI - 10.3906/elk-1208-41
Subject(s) - control theory (sociology) , buck converter , robustness (evolution) , matlab , computer science , pulse width modulation , estimator , observer (physics) , controller (irrigation) , open loop controller , voltage , control engineering , engineering , mathematics , control (management) , closed loop , electrical engineering , physics , biochemistry , agronomy , operating system , quantum mechanics , statistics , gene , chemistry , artificial intelligence , biology
An observer controller for a buck converter is presented. A state feedback gain matrix is derived in order to achieve the stability of the converter and to ensure the robustness of the controller. A load estimator is designed to estimate the unmeasurable variables and to obtain the zero output voltage error. A pulse-width modulation scheme is adopted to obtain the output voltage regulation. In order to improve the transitory response and dynamic constancy of the converter, the controller parameters are designed based on the current mode control. The design is evaluated and veried using MATLAB/Simulink. An experimental set-up is done to evaluate the controller platform.
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