Modelagem E Controle De Um Driver De Leds De Baixa Frequência Baseado No Pré-Regulador Boost
DOI:
https://doi.org/10.18618/REP.2017.4.2699Keywords:
correção de fator de potência, Driver de LEDs em Baixa Frequência, LEDs de Potência, Pré-regulador BoostAbstract
Este artigo detalha a análise e o projeto de um controlador (ou driver) de LEDs baseado no pré-regulador boost de baixa frequência e sua aplicação em luminárias de iluminação pública. A análise do circuito é revisada, sendo proposto um modelo dinâmico do conversor e metodologias de projeto para o controlador e compensador de malha fechada. Resultados experimentais são mostrados para uma luminária LED de 165 W. Em complementação ao texto, é realizada uma discussão sobre o fenômeno da cintilação (flicker) ocasionado pela corrente de baixa frequência fornecida aos LEDs por esse driver.
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