Diseño de una Fuente de Alimentación de dos etapas: AC – DC con Corrección de Factor de Potencia y DC – DC con un Convertidor de Puente Completo (Full Bridge Converter) e Implementación de su etapa AC - DC

Abstract

The following article shows the design and simulation of a Switched Mode Power Supply (SMPS), which the DC–DC stage (with galvanic isolation through a high frequency transformer) is a Full Bridge Converter; and the AC–DC stage with Power Factor Correction (PFC), based in a Boost Converter; with the implementation of the AC-DC stage. The power circuit, for each stage, is dimensioned in order to fulfill certain conditions, such as the ripple level of: the current through the inductors; and, the voltages in the capacitors. Each stage is simulated, in open loop, in order to verify the correct dimensioning of the components. The control circuit is dimensioned for each stage; for this effect, the controllers are designed through the K-Factor approximation; and the integrated circuits controllers are chosen, based upon the requirements for this power supply. Both stages are simulated (separated and coupled), now in closed loop, in order to verify it is working properly, even under sudden changes of the current through the load. Finally, the AC–DC stage is implemented, getting important signal graphics, such as the DC link voltage and the supply current.