Acionamento automático de circuitos de iluminação estruturados em LEDs de potência por meio de um conversor CC/CC abaixador com controle de corrente

Abstract

Currently, electricity has become a costly resource due to the limits of the supply of primary sources, such as fossil fuels, which oppose growing demand. Based on this, the design of new technologies in the devices of the power electronics has led to a more efficient operation than the traditional devices, whose control happened based on a voltage drop in a passive load, causing high losses. As for primary energy sources, much of the energy produced in Brazil comes from hydroelectric plants, which depend on a potentially finite natural resource for energy generation, thus reducing energy consumption is crucial for the preservation of this and other sources. So there are different techniques to reduce energy consumption. For example, the Light Emitter Diode (LED) lamp that uses 81 % less electricity than a fluorescent lamp, saving significant energy bills. Thus, the proposal of this monograph is the construction of a luminaire constituted by power LEDs with a current control using a DC-DC converter. A mathematical and experimental analysis is conducted in this sense in order to better exemplify the proposal.