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Lookup NU author(s): majed Elbkosh, Professor Damian Giaouris, Professor Volker Pickert, Dr Bashar Zahawi, Professor Soumitro Banerjee
The paper studies the stability of parallel DC/DC converters using the concept of monodromy matrix (the state transition matrix for one complete cycle), whose eigenvalues are the Floquet multipliers. This matrix is composed of the state transition matrices for the smooth intervals and those across the switching events (called saltation matrices). We show that instabilities in this system can be caused by smooth as well as nonsmooth period doubling bifurcations, the latter occurring when the fundamental solution matrix undergoes a discontinuous jump as a periodic solution touches a nonsmooth hyper-surface of discontinuity. Based on the expression for the saltation matrices (the state transition matrices across switching events) we propose new controllers that can stabilize the period-1 operation by keeping the eigenvalues inside the unit circle. ©2008 IEEE.
Author(s): Elbkosh A, Giaouris D, Pickert V, Zahawi B, Banerjee S
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: IEEE International Symposium on Circuits and Systems
Year of Conference: 2008
Pages: 556-559
Date deposited: 16/03/2010
ISSN: 9781424416844
Publisher: IEEE
URL: http://dx.doi.org/10.1109/ISCAS.2008.4541478
DOI: 10.1109/ISCAS.2008.4541478
