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Effects of interleaving on the bifurcation behaviour of parallel-connected buck converters

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3 Author(s)
Iu, H.H.C. ; Dept. of Electr. & Electron. Eng., Western Australia Univ., Nedlands, WA, Australia ; Tse, C.K. ; Lai, Y.M.

This paper studies the effect of interleaving operation on the bifurcation behaviour in a system of parallel-connected DC/DC buck converters. Simulations and analysis are presented for both the cases of interleaving operation and synchronous operation. It is found that variation of the voltage feedback gains leads to period-doubling bifurcation. Interleaving operation will discourage the occurrence of this bifurcation by widening the stable region. Also, variation of output capacitance, load or switching period leads to Neimark-Sacker bifurcation. Interleaving operation will make this bifurcation more likely to occur by narrowing the stable region. Bifurcation boundaries of stable period-1 operation in the two cases are located and compared.

Published in:

Industrial Technology, 2002. IEEE ICIT '02. 2002 IEEE International Conference on  (Volume:2 )

Date of Conference:

11-14 Dec. 2002