DBPapers
DOI:10.5593/SGEM2013/BF6/S27.009

AUTOMATIC CONTROL OF A BOOST DC-DC CONVERTER

C. J. Ileana, D. Liviu, G. T.Lucian
Tuesday 6 August 2013 by Libadmin2013

References: 13th SGEM GeoConference on Nano, Bio And Green – Technologies For A Sustainable Future, www.sgem.org, SGEM2013 Conference Proceedings, ISBN 978-619-7105-06-3 / ISSN 1314-2704, June 16-22, 2013, 585 - 592 pp

ABSTRACT

This paper presents the modeling and the analysis of boost DC-DC converter using numerical simulations. The intended parameters of the converter are 15V to 30 V, power 1 kW. The modeling is performed first in MATLAB/SIMULINK toolbox SIMPOWERSYS, and after that the electronic scheme is implemented and simulated in MULTISIM 12. The implemented control system is PI type and is realized using as simple as possible components so that the scheme could be used also as didactical laboratory application. The command is a classic PWM one, realized with a 555 oscillator with a frequency of 10 kHz and a linear variable voltage generator using also the 555 circuit. On the feedback one used a differential error amplifier with 741 circuit and a PI controller also with the 555 circuit. One followed both the simulation in MATLAB/SIMULINK, using a average model of the converter and modeling and simulation in MULTISIM which put in evidence the practical problems appeared in the hard implementation. From the numerical simulations one obtained the converters behavior under different loads and the time response at step load variations. The obtained results are realistic and verify the control method proposed.

Keywords: boost converter, modeling MATLAB/SIMULINK, MULTISIM, PI control, PWM command