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.
Analytical stability boundary for peak-current mode controlled SEPIC
CANTILLO, ANDREA;DE NARDO, ANTONIETTA;FEMIA, Nicola;ZAMBONI, Walter
2010-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
