Study of Fuzzy Logic Control of Dc-Dc Buck Converter

Because of unspecified transfer function of dc-dc converters fuzzy controllers can be used instead of classical controllers. The design of fuzzy controllers does not require an exact mathematical model. Instead they are designed based on general knowledge of the plant. In this paper, a fuzzy logic controller for a dc-dc buck converter is designed. The designed controlled system is simulated in MATLAB/Simulink software. Different parameters such as input voltage and output load are varied and the responses of fuzzy controller to these variations have been studied and investigated in order to evaluate the designed controller performance. The simulation results are presented. Fast dynamic response of the output voltage and robustness to load and input voltage variations are obtained.

Keywords:

Fuzzy logic controller Dc-dc converter, Buck converter,

PDF

___

1. Forsyth, A.J. (1998). Modeling and control of dc-dc converters. Power Engineering Journal, 229-236.
2. Mattavelli, P., Rosetto, L. and Spiazzi, G. (1997). Small-signal analysis of dc-dc converters with sliding mode control. IEEE Transactions on Power Electronics, 12: 96-102.
3. Dixon, L.H. (1990). Average current-mode control of switching power supplies. in Unitrode Power Supply Design Seminar Handbook.
4. Gomes, E., Serra, G. and Gomes, J. (2011). A Fuzzy PI controller application in boost converter. Robotics and Automotive Mechanics Conference, 216-221.
5. Mattavelli, P., Rosetto, L., Spiazzi, G. and Tenti, P. (1997). General purpose fuzzy controller for dc-dc converters. IEEE Transaction on Power Electronics. 12: 79-89.
6. Al-Odienat, A.I., Al-Lawama, A.A. (2008). The advantages of PID fuzzy controllers over the conventional types. American Journal of Applied Sciences, 653-658.
7. Zadeh, L.A. (1965). Fuzzy sets. Information and Control, 8: 338-353.
8. Raviraj, V.S.C. and Sen, P.C. (1997). Comparative study of proportional–integral, sliding mode, and fuzzy logic controllers for power converters. IEEE Transactions on Industry Applications, 33(2): 518-524.
9. Govindaraj, T. and Rasila, R. (2011). Development of fuzzy logic controller for DC–DC buck converters. Int J Engg TechSci., 2(2): 192-198.
10. Liping, G., Hung, J.Y. and Nelms, R.M. (2009). Evaluation of dsp-based pid and fuzzy controllers for dc–dc converters. IEEE Transactions on Industrial Electronics, 56(6): 2237-2247.
11. So, W. C. and Tse, C.K. (1996). Development of a fuzzy logic controller for dc-dc converters: design, computer simulation and experimental evaluation. IEEE Trans. on Power Electronics, 11: 24-32.
12. Rubaai, A. and Chouikha, M.F. (2004). Design and analysis of fuzzy controllers for dc-dc converters. First Int. Symposium on Control Communication and Signal Processing, 479-482.
13. Prasad, K.V.H.M., Rao, CH.U. and Hari, A.S. (2012). Design and simulation of a fuzzy logic controller for buck & boost converters. International Journal of Advanced Technology & Engineering Research (IJATER), 2(3): 218-224.