Implementação e controle de retificador trifásico de alta qualidade com comutação em baixa freqüência
DOI:
https://doi.org/10.18618/REP.2002.1.015021Abstract
A implementação de um retificador trifásico de 10 kW de alta qualidade, baseado na ponte retificadora convencional com a adição de uma célula de comutação é apresentada neste artigo. Comparado com outros retificadores comutados na freqüência da linha, o circuito proposto não viola os limites de distorção da corrente, definidos na recomendação técnica IEC 61000-3-4, em nenhum nível de potência. A topologia permite ainda o controle da tensão de saída, regulando-a contra variações na carga e na entrada. O controle é feito com o auxilio de um microcontrolador PIC17c756. Foi construído um protótipo e os resultados confirmam a análise teórica.
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