Uma nova proposta de oscilador de potência chaveado com comutação suave

• Ano de defesa: 2003
• Autor(a) principal: Freitas, Luiz Carlos Gomes de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; Brasil; Programa de Pós-graduação em Engenharia Elétrica
• Palavras-chave em Português: Oscilador de potência; Circuitos auto-oscilantes; Conversores CC-CA; Inversores; Reatores eletrônicos; Fontes auxiliares auto-oscilantes; Power oscillator; Self-oscillating circuits; CC-CA converters; Inverters; Electronic Ballast and Self-oscillating Auxiliary Power Supply; CNPQ::ENGENHARIAS; Osciladores; Circuitos de comutação; Inversores elétricos
• Link de acesso: https://repositorio.ufu.br/handle/123456789/30172; http://doi.org/10.14393/ufu.di.2003.72

This work presents a new proposal of switched power oscillator witli soft-switching. This new converter was named Self-oscillating Boost EIE Converter and it.s niain op-erational characteristic is that the oscillation eurrent lias been diverl.ed írom the niain switches allowing a substantial reduction of the eonduetion losses. Sincc scll-uscillai ing techniques are used, this converter presents low cost because there is 110 need to use auxiliary start devices and control circuits. Two different kincls of application were studied. applied as an Inverter St age ha Elec-tronic Ballast for Fluorescent Lainps and applied as a Self-oscillating Auxiliary Low Open Loop Power Supply. Applied as an inverter stage for eleetronic ballast. studics abotn o>-tablisher circuits and pre-regulators circuits were cleveloped. Design guide line of the Self-oscillating Boost EIE Converter and LCC Circuit are presenteei. Simulat.ions results and experimental results of four different prototypes built at laboratory are also included