Title :
Analytical stability boundary for peak-current mode controlled SEPIC
Author :
Cantillo, A. ; De Nardo, A. ; Femia, N. ; Zamboni, W.
Author_Institution :
DIIIE, Univ. of Salerno, Fisciano, Italy
Abstract :
Peak Current Controlled SEPIC (PCC-SEPIC) stability is discussed in this paper. Critical values of the coupling capacitance and of the current modulator gain for stability are analytically determined for loss-less converter by using a novel reduced order lossless ac model of PCC-SEPIC. A stability boundary is thus derived, unveiling a correlation among the coupling capacitance, the current modulator gain and the stability. The stability predictions provided by the loss-less model are compared with the results of simulations and experiments. A numerical investigation on PCC-SEPIC stability when resistive losses are taken into account is provided for a critical evaluation of the results obtained by means of the analytical loss-less model.
Keywords :
DC-DC power convertors; electric current control; power inductors; stability; PCC-SEPIC stability; analytical stability boundary; coupling capacitance; current modulator gain; peak current controlled SEPIC; reduced lossless AC model; single-ended primary inductor converter; Circuit stability; Converters; Couplings; Frequency modulation; Numerical models; Numerical stability; Stability analysis; DC/DC converters; SEPIC; current mode control; switching converters stability;
Conference_Titel :
Control and Modeling for Power Electronics (COMPEL), 2010 IEEE 12th Workshop on
Conference_Location :
Boulder, CO
Print_ISBN :
978-1-4244-7462-2
Electronic_ISBN :
978-1-4244-7461-5
DOI :
10.1109/COMPEL.2010.5562386
