Observer-based controller for current mode control of an interleaved boost converter

A state feedback control method for an interleaved boost power converter is designed, which, in turn, can achieve interleaved current sharing among parallel-connected converters. The state feedback control in the continuous time domain is derived using the pole placement technique and linear quadratic optimal method. The load estimator is designed by deriving a full-order state observer to ensure the robustness and optimality of the state feedback control and an observer-based controller (control law plus full-order state observer) is designed using the separation principle. The adopted control strategies achieve effective output voltage regulation, good dynamic stability, and reject disturbances. Extensive simulation is carried out and the results are illustrated.

Anahtar Kelimeler:

Control law, full-order state observer, interleaved boost converter, pole placement, Riccati matrix, separation principle

Observer-based controller for current mode control of an interleaved boost converter

Keywords:

Control law, full-order state observer, interleaved boost converter, pole placement, Riccati matrix, separation principle,

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J.R. Pinheiro, H.A. Grundling, D.L.R. Vidor, J.E. Baggio, “Control strategy of an interleaved boost power factor correction converter”, Power Electronics Specialist Conference, Vol. 1, pp. 137–142, 1999. H.F.F. Leung, K.S.P. Tam, C.K. Li, “The control of switching DC-DC converters - a general LQR problem”, IEEE Transactions on Industrial Electronics, Vol. 38, pp. 65–71, 1991.
H.S. Bae, J.H. Yang, J.H. Lee, B.H. Cho, “Digital state feedback current control using the pole placement technique”, Journal of Power Electronics, Vol. 7, pp. 213–221, 2007.
W.J. Kimball, T.J. Mossoba, T.P. Krein, “A stabilizing, high-performance controller for input series-output parallel converters”, IEEE Transactions on Power Electronics, Vol. 23, pp. 1416–1427, 2008.
J.C. Mayo-Maldonado, R. Salas-Cabrera, H. Cisneros-Villegas, M. Gomez-Garcia, E.N. Salas-Cabrera, R. CastilloGutierrez, O. Ruiz-Martinez, “Modeling and control of a DC-DC multilevel boost converter”, Proceedings of the World Congress on Engineering and Computer Science, Vol. 2, 2010.
N. Gonzalez-Fonseca, J. De Leon-Morales, J. Leyva-Ramos, “Observer-based controller for switch mode DC-DC converters”, Proceedings of the 44th IEEE Conference on Decision and Control and European Control Conference, pp. 4773–4777, 2005.
C.K. Tse, M. Di Bernardo, “Complex behavior in switching power converters”, Proceedings of the IEEE, Vol. 90, pp. 768–781, 2002.
S. Mariethoz, S. Almer, M. Baja, A.G. Beccuti, D. Patino, A. Wernrud, J. Buisson, H. Cormerais, H. Fujioka, T. Geyer, U.T. Jonsson, C.Y. Kao, M. Morari, G. Papafotiou, P. Riedinger, “Comparison of hybrid control techniques for buck and boost DC-DC converters”, IEEE Transactions on Control Systems Technology, Vol. 18, pp. 1126–1145, 20
R.D. Middlebrook, “Small-signal modeling of pulse-width modulated switched-mode power converters”, Proceedings of the IEEE, Vol. 76, pp. 343–354, 1988.
C. Sudhakarababu, M. Veerachary, “DSP based control of interleaved boost converter”, Journal of Power Electronics, Vol. 5, pp. 180–189, 2005.
M. Gopal, Digital Control and State Variables Methods Conventional and Intelligent Control Systems, New York, McGraw Hill, 2009.