Modulação descontínua para conversores com pernas em paralelo magneticamente acopladas

• Ano de defesa: 2017
• Autor(a) principal: Ricciotti, Antonio Carlos Duarte
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Engenharia Elétrica; UFSM; Programa de Pós-Graduação em Engenharia Elétrica; Centro de Tecnologia
• Palavras-chave em Português: Modulação descontínua com portadora; Conversores interleaved; Controle de corrente circulante; Modulação de conversores; Pernas em paralelo; Discontinuous carrier modulation; Interleaved converter; Circulating current control; Converter modulation; Parallel legs; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/13372

Aiming to contribute to modulation strategies for converters with magnetically coupled parallel legs, a new strategy of discontinuous carrier modulation is developed for this class of converters. To clarify the strong points and limitations of the proposed modulation, an analysis between the discontinuous modulation and the phase shift carrier modulation with geometric approach is presented. Therefore, the synthesized multilevel equivalent output line voltage, the circulating currents between the parallel legs of the converter and the voltage and current THDs are investigated and compared in detail. First, the details of the geometric modulation for converters with parallel legs are presented. Next, the development of discontinuous carrier modulation by state machines is presented. The proposed modulation shows good results when compared to the phase shift carrier modulation strategy for interleaved converters. Experimental and simulation results show characteristics such as: (i) Limitation of circulating current; (ii) Reduction of THD of the output current; (iii) Reduction of current in switches; (iv) Reduction in the stress of the switching of switches; (v) Ease implementation are achieved by this modulation strategy.