The Usage of the Digital Controller in Regulating Boost Converter

Muhanad D. Almawlawe^*, Darko Mitic, Marko Milojevic

Department of Control Systems, Faculty of Electronic Engineering, University of Nis, Nis, Republic of Serbia.

DOI: 10.4236/cs.2015.612027                

Abstract

This paper proposes the modeling and simulation technique to analyze and design a Boost converter using generalized minimum variance method with discrete-time quasi-sliding mode to adjust the converter switch through a pulse width modulation (PWM), so as to enhance a stable output voltage. The control objective is to maintain the sensed output voltage stable, constant and equal to some constant reference voltage (8 volt) in the load resistance variation (24, 48, 240) Ω and input voltage variation (20, 24, 28) volt circumstances. This control strategy is very appropriate for the digitally controlled power converter and for the system requirement accomplishment, resulting high output voltage accuracy. The performance degradation in practical implementation can be expected due to noise, PWM nonlinearities, and components imperfection. The digital simulation using MATHLAB/Simulink is performed to validate the functionality of the system.

Keywords

Boost Converter, Input-Output Measurement, QSM (Quasi-Sliding Mode), GMV (Generalized Minimum Variance), PWM (Pulse Width Modulation)

Conflicts of Interest

The authors declare no conflicts of interest.

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