Convertidores aislados dc- dc para uso en aplicaciones de energía fotovoltaica : convertidor dc- dc aislado indirecto (FLYBACK).

Abstract

The purpose of this technical work is the design and elaboration of a DC-DC converter's prototype type flyback, which works like a buck converter for low voltage loads, taking photovoltaic energy. The flyback converter is designed to operate in discontinuous conduction mode (DCM) to reduce the converter output voltage, which works with 50 watts of photovoltaic modules. The system control is based on the current control of the transformer primary side, accompanied by a PI controller for keeping the manual current setpoint. The converter's control has an integrated circuit for switching supplies, which is TL494. The transformer is made with recycled ferrites cores of electronic circuits such as computer supplies. The flyback converter prototype is subjected to functionality tests with a voltage supply of the laboratory to verify waveforms and the average efficiency of the converter.