Conversor CC-CC De Alto Ganho Com Divisão De Esforços De Corrente No Estágio De Entrada
DOI:
https://doi.org/10.18618/REP.2017.4.2704Keywords:
Alto Ganho de Tensão, Boost-flyback, Conversor CC-CC, Interleavead, ModelagemAbstract
Neste artigo é proposto um conversor CC-CC de alto ganho com divisão de esforços de corrente no estágio de entrada. Este conversor foi idealizado com base na topologia Boost-Flyback, a qual tem como principal característica alto ganho de tensão, pelo fato de possuir N saídas em série. Por apresentar alta corrente na entrada do conversor, devido à baixa tensão nesse estágio de potência, é então proposta a divisão de corrente na entrada através da técnica de interleavead, isto é, utilizar N conversores em paralelo. A conexão em paralelo na entrada possibilita a divisão de correntes entre os semicondutores, diminuindo-se as perdas do conversor. Para a análise do conversor é desenvolvida a modelagem estática e dinâmica obtendo a função de transferência do conversor para posterior realização do projeto de controladores. Além disso, são apresentados o projeto, as simulações e os resultados experimentais do conversor operando em malha fechada para uma potência de 1,2 kW.
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