Correção do fator de potência em reatores eletrônicos para o acionamento de leds utilizados em iluminação de ambientes

Abstract

The light emitting diodes (LEDs) used in indoors and outdoors lighting are becoming more popular with the lighting industry. This type of device cannot be connected directly to the grid; it needs a reactor or drives do adapt the voltage levels. Thus, electronic ballasts are generally used to accomplish this task. However, in some cases the circuits are not designed aiming to factors such as power quality, performance and durability of high-intensity LED lights, generating high levels of harmonic distortion, low power factor and consequently a low efficiency. This work aims to present a circuit that reduces considerably the total harmonic distortion of drives for driving LEDs and consequently corrects the power factor of the ballast for high power LEDs.