Modelagem e controle de um reator eletrônico para lâmpadas HPS baseado na conexão diferencial de conversores CC

• Ano de defesa: 2012
• Autor(a) principal: Hansen, Jacson
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica
• Palavras-chave em Português: Reatores eletrônicos; Lâmpadas HPS; Conexão diferencial; Modelagem; Controle de conversores; Electronic ballast; HPS lamps; Differential connection; Modeling; Converters control; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/8502

This paper presents the development of an electronic ballast for high intensity discharge lamps, using the differential connection technique applied to Flyback converters. The power factor correction stage was implemented by a Buck-Boost converter operating in discontinuous conduction mode. Subsequently, the integrating converters technique was used to simplify the power circuit, making the power factor correction stage and Flyback converters share the same active switches. The proposed circuit was dynamically modeled, in order to obtain the mathematical parameters that govern the behavior of the ballast, obtaining the differential equations relating the voltage and current in the lamp, due to the variation of both the input voltage as the duty cycle. Digital control of the output current provided the use of a low cost microcontroller, the compensating system was designed in discrete time from the use of an integrator and a low frequency bandwidth. For effective control of lamp power, an external loop that regulates the circuit current reference was implemented. The practical implementation of the electronic ballast was performed, in order to verify the proposed control performance.