“Diseño de una fuente de alimentación de dos etapas: AC-DC con corrección de factor de potencia y DC-DC con un convertidor de contrafase (Push-Pull Converter) e implementación de su etapa AC-DC”

Abstract

This document presents the complete design of a switching power supply in two stages, the first stage is an AC-DC converter which includes a power factor correction based on a Boost converter, the only stage that has been implemented, and the second stage is a DC-DC converter based on the Push-Pull converter. For both steps the sizing of the components is performed, mainly the power, voltage and current ratings, and other parameters considering the design specifications. This project only presents AC-DC implementation therefore the operation of the switching power supply, joining both stages in closed-loop, can only be verified by simulation. In this simulation some tests are performed, for instance full load operation and load changes, to verify by the waveforms of the signals the suitable operation of the power supply. All simulations were performed with Simulink from MATLAB and PLECS from PLEXIM. Finally the implementation results of the AC-DC stage are shown which are compared against the results of the simulation.