Análise, Projeto e Desenvolvimento de um Conversor Duplo Forward Zcs com Ressonânica Dupla para Aplicação em Fontes Chaveadas Isoladas
DOI:
https://doi.org/10.18618/REP.2013.2.896907Keywords:
comutação suave, Duplo Forward, Fontes chaveadas, ZCSAbstract
Este trabalho apresenta um novo conversor Duplo Forward que consiste de dois conversores Forward acoplados ao mesmo núcleo magnético permitindo o uso completo do ciclo de histerese do transformador. No intuito de reduzir as perdas por chaveamento e interferências eletromagnéticas, uma célula de comutação suave, a qual permite a comutação dos interruptores sob corrente nula (ZCS), é utilizada. Essa estrutura propicia comutação não dissipativa para uma ampla faixa de carga e uma melhor distribuição de corrente entre os interruptores utilizados. O estudo teórico completo acerca do conversor Duplo Forward proposto é apresentado e corroborado por resultados experimentais obtidos com a construção de um protótipo de 450 W.
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