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Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

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Issue: Volume 25 - Number 4
Publishing Date: dezembro 2020
Editor-in-Chief: Demercil de Souza Oliveira Júnior
Editor Affiliation: UFC
9S-SSI: PROPOSTA, ANÁLISE E MODULAÇÃO
Leonardo Acosta Rodrigues, Diego Brum Chaves, Felipe Bovolini Grigoletto
452-463
http://dx.doi.org/10.18618/REP.2020.4.0030
Portuguese Data

Palavras Chaves: modulação vetorial

Resumo
A topologia Nine-Switch (9S) é uma interessante alternativa frente ao tradicional inversor back-to-back trifásico, pois permite a redução do número de interruptores de potência. Por outro lado, algumas aplicações dispõem de tensões CC menores que o valor mínimo requerido para síntese da tensão alternada de saída, sendo necessário o emprego de um estágio CC-CC adicional. Neste sentido, o inversor com fonte dividida ou Split-Source Inverter (SSI) agrega a elevação e inversão de tensão em um único estágio de processamento de energia, dispensando múltiplos conversores. Este artigo propõe a topologia 9S-SSI que une as características de dupla porta bidirecional trifásica conjuntamente com o estágio de elevação de tensão CC. É proposta uma estratégia de modulação PWM abordada de forma vetorial e escalar. Ambas abordagens são correlatas, contudo a primeira permite a escolha direta dos vetores de comutação enquanto que a segunda possui a vantagem da facilidade de implementação. Além disso, uma análise de perdas e o dimensionamento dos dispositivos de potência são apresentados. Resultados de simulação e experimentais são apresentados para demonstrar o bom desempenho da topologia e estratégias de modulação propostas.

English Data

Title: Analysis and Modulation of Nine-Switch Split Source Inverter (9S-SSI)

Keywords: Nine-switch inverter, space vector modulation

Abstract
The nine-switch (9S) topology is an interesting alternative to the traditional three-phase back-to-back converter because it allows the reduction of active semiconductors count. On the other hand, some applications have input dc voltages lower than that minimum required for the synthesis of ac voltages and an additional dc-dc stage is required. Furthermore, the Split-Source Inverter (SSI) aggregates the boost and inversion stage in a single power processing unit, eliminating multiple converters. This paper proposes the Nine-Switch Split-Source Inverter (9S-SSI) that joins the characteristisc of dual three-phase power ports with the dc voltage boost stage. In addition, a PWM strategy is proposed where the SV and scalar approaches are presented. Both approaches are correlated, however the first one allows the direct choice of switching vectors while the second has the advantage of ease of implementation. Futhermore, the loss analysis and the dimentioning of power devices are presented. Simulation and experimental results are presented to demonstrate the good performance of the proposed topology and modulation strategy.

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[23] “MOUSER ELECTRONICS”, URL: <https://https://www.mouser.com/>. Acesso em 20 de Ago. de 2020

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