Soft switching high-voltage gain dc–dc interleaved boost converter

• Autor(a) principal: Aquino, Ranoyca Nayana Alencar Leão e Silva
• Data de Publicação: 2015
• Outros Autores: Tofoli, Fernando Lessa, Praça, Paulo Peixoto, Oliveira Júnior, Demercil de Souza, Barreto, Luiz Henrique Silva Colado
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/69464
• topic: Soft switching cell; Active snubber cell; Hard switching topology; Soft switching high-voltage

This study presents the qualitative and quantitative analyses, design procedure and experimental results on a soft switching cell applied to a high-voltage gain interleaved boost converter. An active snubber cell is proposed as a possible solution for the increase of efficiency in a hard switching topology, where switching losses are drastically minimised. The main advantages of the introduced circuit are the common source terminal to all switches; zero-voltage switching of the main switches; zero current switching of the auxiliary switches; low-voltage stress across the switches; balanced voltage across the output capacitors; the presence of a magnetic coupling cell, which allows the gain to be significantly increased; and the magnetic components that are designed for twice the switching frequency. A prototype rated at 500 W is implemented and evaluated, where relevant issues are discussed to validate the theoretical assumptions.