Controlador de fator de potência para equipamentos de solda a arco elétrico

Abstract

Electronic devices and equipment provide different energy resources using inductive, capacitive or resistive loads. Generating reactive, active and apparent powers. Powers that are used for actions of electronic components such as drives, light generation and heat. In resistive circuits, the storage power is dissipated as heat, however, in circuits where there are reactive loads like capacitors and inductors, the power is not fully released, causing that much part of it is wasted. This causes disturbances, called harmonics, which are multiple frequencies of the fundamental. However, a power used in the application becomes less than the power consumed, causing a waste energy.This work is a study of the power quality and the energy problems arc welding equipment cause and, with that, make a correction of the electronic form through an electronic circuit. The circuit will also decrease the rate of harmonic distortions, power factor correction and decrease the electromagnetic interference generated by the system to the grid by controlling a current waveform through the switching an inductive load. The intention is to use almost all the energy consumed by the network. Almost all, becauseaccording the Law of Thermodynamics, cannot use all the energy saved, but with PFC is possible to have a very close input-to-output power [resumo fornecido pelo autor].