Conversor CC-CC SEPIC com célula R²P² para aplicações com elevado ganho estático

• Ano de defesa: 2021
• Autor(a) principal: Senderski, Andre Miguel
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Ponta Grossa; Brasil; Programa de Pós-Graduação em Engenharia Elétrica; UTFPR
• Palavras-chave em Português: Conversores de corrente elétrica; Tensão - Concentração; Circuitos elétricos; Transistores; Transformadores elétricos; Métodos de simulação; Circuitos de comutação; Electric current converters; Stress concentrations; Electric circuits; Transistors; Electric transformers; Simulation methods; Switching circuits; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA; Engenharia/Tecnologia/Gestão
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/30549

The present work aims to study a DC-DC SEPIC converter operating in continuous conduction mode for applications with high voltage gain, in non-isolated and isolated versions. Among the techniques used to obtain high gain, such as switched inductor and switched capacitor, this converter uses R²P² cell, originated by the concept of reduced redundant power processing. The DC-DC SEPIC R²P² converter maintains the main characteristics of the conventional SEPIC converter, featuring only one controlled switch, which reduces the complexity and cost. As a disadvantage, there is an increase in the component count. In the isolated version, the work presents the study of two clamping circuits, one the RCD dissipative and the other nondissipative, to mitigate the problem of overvoltage in the transistor, resulting from the energy stored in the transformer’s leakage inductance. The work also presents the theoretical analysis of the converters, with the description of the principle of operation, the design equations and a design procedure. Finally, the work presents numerical simulation results from a converter operating with 40 V of input voltage, 400 V of voltage output, 50 kHz of switching frequency and 200 W of rated power.