This paper compares two current-fed push-pull DC-DC power
converters: the current-fed push-pull power converter or isolated boost
and an alternative topology named here as the dual inductor push-pull
power converter (DIC). Since this latter converter has just one primary
winding, the voltage across the main switches is reduced to the half of
that in the isolated boost topology; the average current in the input
inductors is also halved and the RMS current in the output capacitor is
smaller. The overall efficiency is increased and the power converter's
volume is reduced in the DIC converter. These and other improved design
characteristics make this alternative topology more attractive than the
isolated boost for equivalent applications. Analytical equations, output
characteristic curves and computer simulations of both power converters
are compared. An experimental breadboard of 480 W power has been
assembled in order to verify the performance of the DIC power converter.
The main results are provided