scholarly journals Sliding Mode Control Based on Internal Model for a Non-minimum phase Buck and Boost Converter

Enfoque UTE ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 41-53
Author(s):  
Byron Cajamarca ◽  
Óscar Camacho Quintero ◽  
Danilo Chávez ◽  
Paulo Leica ◽  
Marcelo Pozo
Keyword(s):  
Sliding Mode Control ◽  
Internal Model ◽  
Sliding Mode ◽  
Pi Controller ◽  
Boost Converter ◽  
Internal Model Control ◽  
Minimum Phase ◽  
Mode Control ◽  
Model Control ◽  
Control Schemes

This work presents the application of different schemes to control a non-minimum phase Buck-Boost converter. Three control schemes are used. The first controller presented is a PI controller, the second one is Sliding Mode Control and the third one is a combination of two control schemes, Internal Model Control and Sliding Mode Control. The controllers are designed from a Right-Half Plane Zero (RHPZ) reduced order model. The RHPZ model is converted, using Taylor approximation, in a First Order Plus Dead Time (FOPDT) model and after that, the controllers are obtained. The performance of the SMC-IMC is compared against to a PI controller and a SMC. The simulation results show that SMC-IMC improves the converter response, reducing the chattering and presenting better robustness for load changes

DESIGN AND IMPLEMENTATION OF A NOVEL CONTROL ARCHITECTURE BY COMBINING H∞ AND SLIDING MODE SCHEMES FOR A BOOST CONVERTER

2013 ◽  
Vol 22 (01) ◽  
pp. 1250066 ◽  
Author(s):  
SHAMA RAVICHANDRAN ◽  
K. S. NAGARAJ ◽  
S. K. PATNAIK
Keyword(s):  
Sliding Mode Control ◽  
Closed Loop ◽  
Sliding Mode ◽  
Boost Converter ◽  
Loop Control ◽  
Load Variations ◽  
Mode Control ◽  
Control Schemes ◽  
Practical Design ◽  
Selection Of

A two-loop control has been designed for a boost converter. An internal sliding-mode control loop forces the converter inductor current to track the reference established by H∞ control of the output voltage in an outer loop. The outer H∞ controller is designed through loop shaping concepts. A practical design approach that aims at systematizing the procedure for the selection of inner sliding mode control parameters is also presented. The closed loop characteristics of a typical low-power boost converter with the proposed dual loop controller implemented in the actual switched model is validated through computer simulation. The proposed controller is found to be superior due to its low distortion property, good regulating performance and insensitivity to load variations. Finally, the validity and effectiveness of the control schemes are verified through hardware experiments.

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