Study of Sliding Mode Control of DC-DC Buck Converter

Hanifi Guldemir

.

DOI: 10.4236/epe.2011.34051                

Abstract

In this paper, a robust sliding mode controller for the control of dc-dc buck converter is designed and analyzed. Dynamic equations describing the buck converter are derived and sliding mode controller is designed. A two-loop control is employed for a buck converter. The robustness of the sliding mode controlled buck converter system is tested for step load changes and input voltage variations. The theoretical predictions are validated by means of simulations. Matlab/Simulink is used for the simulations. The simulation results are presented. The buck converter is tested with operating point changes and parameter uncertainties. Fast dynamic response of the output voltage and robustness to load and input voltage variations are obtained.

Keywords

Switched-Mode Power Supplies, Buck Converter, Dc-Dc Converter, Sliding Mode Control

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	A. J. Forsyth, “Modeling and Control of DC-DC Converters,” Power Engineering Journal, Vol. 12, No. 5, 1998, pp. 229-236. doi:10.1049/pe:19980507
[2]	P. Mattavelli, L. Rosetto and G. Spiazzi, “Small-Signal Analysis of Dc-Dc Converters with Sliding Mode Control,” IEEE Transactions on Power Electronics, Vol. 12, No. 1, 1997, pp. 96-102. doi:10.1109/63.554174
[3]	J. Matas, L. G. Vicuna, O. Lopez, M. Lopez and M. Castilla, “Sliding-LQR Based Control of Dc-Dc Converters,” European Power Electronics Conference (EPE’99), Lausanne, 7-9 September 1999.
[4]	G. Spiazzi and P. Mattavelli, “Sliding Mode Control of Switched-Mode Power Supplies,” CRC Press LLC, Boca Raton, 2002.
[5]	O. Kaynak and F. Harashima, “Disturbance Rejection by Means of Sliding Mode,” IEEE Transactions on Industrial Applications, Vol. 32, No. 1, 1985, pp. 85-87.
[6]	Y. He and F. L. Luo, “Sliding-Mode Control for Dc-Dc Converters with Constant Switching Frequency,” Control Theory and Applications, Vol. 153, No. 16, 2006, pp. 37- 45.
[7]	Z. H. Akpolat and H. Guldemir, “Trajectory Following Sliding Mode Control of Induction Motors,” Electrical Engineering, Vol. 85, No. 4, 2003, pp. 205-209. doi:10.1007/s00202-003-0166-6
[8]	H. Guldemir, “Sliding Mode Speed Control for Dc Drive Systems,” Mathematical and Computational Applications, Vol. 8, 2003, pp. 337-384.
[9]	H. Guldemir, “Sliding Mode Control of Dc-Dc Boost Converter,” Journal of Applied Sciences, Vol. 5 No. 3, 2005, pp. 588-592
[10]	J. J. Slotine and T. S. Liu, “Applied Nonlinear Control,” Prentice Hall, Englewood Cliffs, 1991.
[11]	J. Y. Hung, W. Gao and J. C. Hung, “Variable Structure Control: A Survey,” IEEE Transactions on Industrial Electronics, Vol. 40, No. 1, 1993, pp. 2-21. doi:10.1109/41.184817
[12]	V. Utkin, J. Guldner and J. Shi, “Sliding Mode Control in Electromechanical Systems,” Taylor and Francis, 1999.
[13]	V. Utkin, “Sliding Mode Control Design Principles and Applications to Electric Drives,” IEEE Transactions on Industrial Applications, Vol. 40, 1993, pp. 23-36.
[14]	J. H. Su, J. J. Chen and D. S. Wu, “Learning Feedback Controller Design of Switching Converters via Matlab/ Simulink,” IEEE Transactions on Education, Vol. 45, 2002, pp. 307-315. doi:10.1109/TE.2002.803403
[15]	H. Sira-Ramirez, “On the Generalized PI Sliding Mode Control of DC to DC Power Converters: A Tutorial,” International Journal of Control, Vol. 76, No. 9, 2003, pp. 1018-1033.