Estudo comparativo entre dois modos de conexão de conversores CC-CC empregados em lâmpadas de LED para sistemas de iluminação pública

Abstract

This work presents a comparative study between two different connections of DC-DC converters used in LED lamps for street lighting. One of the connections is based on the technique known as Reduced Redundant Power Processing and the other one is the series connection of static converters. The SEPIC and buck-boost converters were implemented, respectively, in the power factor correction and power control demanded by the load stages. Both of the converters operate in the discontinuous conduction mode of current. Prototypes of 70 W were developed for the two connection types. The experimental results obtained shows the performance of each connection type. Both of the connections are in compliance with the IEC 61000-3-2 Class C standard and the practicals recommendations IEEE Std 1789-2015. A discussion is realized about the advantages and disadvantages of each connection type.