Reator Eletrônico Microcontrolado para Lâmpadas de Vapor de Sódio a Alta Pressão e Comparações com um Reator Convencional
DOI:
https://doi.org/10.18618/REP.2003.2.051059Keywords:
lâmpada de vapor de sódio, microcontrolador, reator eletrônicoAbstract
Este artigo apresenta um reator eletrônico com um único estagio de processamento de potência para lâmpadas de vapor de sódio a alta pressão (SAP). Um conversor CC-CC buck que controla a corrente e a potência na lâmpada, um pré-regulador de fator de potência baseado no conversor boost, operando no modo de condução descontínua, e um inversor são combinados formando um conversor BIBRED com dupla alimentação em ponte completa. A lâmpada é alimentada com forma de onda retangular de corrente em baixa freqüência. Todos os sinais de comando são gerados por um microcontrolador dedicado. Um protótipo de 70W operando livre de ressonância acústica foi implementado e os resultados do reator eletrônico proposto são comparados com os resultados de um reator convencional.
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