Hybrid multilevel converter employing half-bridge modules

Batschauer, Alessandro Luiz; Heldwein, Marcelo Lobo; Mussa, Samir Ahmad; Perín, Adriano

doi:10.1109/cobep.2009.5347669

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…Another class of cascaded converters is found in references [15], [16], [17], [18]. These are classified as hybrid multilevel converters, has atracted great attention during the last years.…”

Section: Introductionmentioning

confidence: 99%

“…These are classified as hybrid multilevel converters, has atracted great attention during the last years. The hybrid multilevel converter association can be given by the application of the different topology cells in the structure of converter, or through different semiconductor technology at the cells, or in unlike modulation schemes among the cells [15]. The main advantages of these topologies is the reduction of converter losses and high power quality.…”

Section: Introductionmentioning

confidence: 99%

“…The Half-Bridge cells are connected in a particular way and ensure that no dc voltage level is generated at the output phase voltages [12]. When compared to the hybrid inverter proposed in [15], [19] the proposed inverter reduces the relative power processed by the Half-Bridge cells. The exceding power is processed at the three level three-phase NPC inverter.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid three-phase multilevel inverter based ON NPC cascaded to half-bridge cells

Silva

Trentini

Odaguiri

et al. 2013

2013 Brazilian Power Electronics Conference

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This work presents a novel hybrid three-phase multilevel inverter that employs a three-phase Neutral Point Clamped converter and single-phase Half-Bridge cells in a particular cascade connection. Its cascaded structure allows its application in medium-voltage applications with low voltage semiconductors. The inverter operation is analyzed and can lead to a 5, 7 or 9 level structure. A hybrid modulation scheme for the operation with five levels at the output phase voltage is proposed, which leads to unidirectional power flow in all dc sources and, thus, eases the implementation. The proposed structure and modulation scheme are analyzed and explained in details and simulation and experimental results are provided to verify the presented analysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid three-phase multilevel inverter based ON NPC cascaded to half-bridge cells

Silva

Trentini

Odaguiri

et al. 2013

2013 Brazilian Power Electronics Conference

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“…Countless topologies have been developed to supply this potential necessity and most of them led to the multilevel inverters [1]. Researches show that the first multilevel converter was presented over 30 years ago when an inverter with an AC staircase voltage output was developed by the connection of two full-bridge cells.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of a cascaded multilevel inverter using Buck EIE converters

Costa

Freitas

Batista

et al. 2012

2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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The multilevel inverters are pointed in the literature as one of the most suitable solutions for high-power applications, in medium and high voltage levels. These inverters are based on the association of converters, either in parallel or in series, aiming to process a smaller amount of the total output power in each converter. Generally, the output voltage and/or current is a staircase waveform and the output voltage has low harmonic distortion. In this context, a novel approach on cascaded multilevel inverters is presented in this paper. The proposed topology is based on the cascaded association of Buck EIE inverters, developed from the EIE active commutation cell. The output voltage is totally controlled and follows a desired reference signal, which assures low harmonic distortion without the necessity of using passive filters on the converter output. The voltage stress levels over the power semiconductor devices, especially switches and diodes, are kept low even for high voltage applications. Detailed circuit description is given as well as simulation and experimental results of a Multilevel Buck EIE Inverter prototype, in order to confirm the operation principles of the proposed topology.

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“…Essas associações constituem os denominados conversores multiníveis que, segundo pesquisa bibliográfica, tiveram seu primeiro registro na literatura há mais de 30 anos, em uma proposta de associação de duas células full-bridge [2][3][4]. Com o passar do tempo, novas topologias foram propostas e, atualmente, podese destacar dois grandes grupos de conversores multiníveis: topologias clamped e topologias cascateadas.…”

Section: Introductionunclassified

Uma nova abordagem para inversores multiníveis em cascata utilizando células de comutação EIE

Costa

Freitas

Joao

et al. 2010

2010 9th IEEE/IAS International Conference on Industry Applications - INDUSCON 2010

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A novel approach for cascaded multilevel inverters is presented in this paper. The proposed topology is based on the association of DC/DC converters developed from an active commutation cell called EIE. The multilevel Buck EIE inverter provides an AC output and low voltage stress levels over the power semiconductor devices. The output voltage is totally controlled and follows a reference signal, which assures low harmonic distortion for the output voltage without the necessity of using passive filters. Detailed circuit description is given as well as simulation and experimental results, in order to confirm the operation principle of the proposed topology. I. INTRODUÇÃONo intuito de viabilizar e garantir a operação de conversores de potência em elevados níveis de tensão ou corrente, tais como em drivers eletrônicos e compensadores estáticos, pode-se recorrer à associação de conversores estáticos e de células de comutação [1]. Essas associações constituem os denominados conversores multiníveis que, segundo pesquisa bibliográfica, tiveram seu primeiro registro na literatura há mais de 30 anos, em uma proposta de associação de duas células full-bridge [2][3][4]. Com o passar do tempo, novas topologias foram propostas e, atualmente, podese destacar dois grandes grupos de conversores multiníveis: topologias clamped e topologias cascateadas. Dentre as topologias clamped, destacam-se as associações diodeclamped e capacitor-clamped [5-6].As topologias clamped citadas são amplamente utilizadas devido ao número relativamente pequeno de interruptores utilizados e à ausência de fontes de alimentação independente para cada nível do conversor [7]. No entanto, para aplicações que requerem elevados níveis de corrente e/ou tensão, há uma grande limitação no uso destas topologias, uma vez que o número de componentes necessários (diodos e capacitores), bem como a tensão reversa em cada um deles e nos interruptores aumenta significativamente, diminuindo assim sua viabilidade econômica.As topologias em cascata, em seu arranjo convencional, possuem fontes de alimentação independentes para cada nível do conversor. Resumidamente, cada célula do conversor multinível em cascata é capaz de prover três níveis de tensão (0, +Vdc e -Vdc) e a tensão de saída total do conversor é representada pela soma das tensões advindas de cada nível do conversor.Conversores baseados na topologia cascateada apresentam vantagens, principalmente em função de sua implementação modular e viabilidade de utilização em aplicações com elevados níveis de tensão ou corrente [8]. Cabe ressaltar que estudos apontam para uma redução de até 15% no valor do custo de implementação, quando utilizada esta topologia [9].Diante do exposto, este artigo contribui com a apresentação de uma nova abordagem da topologia cascateada, por meio da implementação de um novo arranjo topológico denominado Inversor Multinível Buck EIE. Este arranjo possui como principal vantagem a possibilidade de ser utilizado em aplicações de elevada tensão, sem que os dispositivos interruptores sofram sever...

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Hybrid multilevel converter employing half-bridge modules

Cited by 7 publications

References 13 publications

Hybrid three-phase multilevel inverter based ON NPC cascaded to half-bridge cells

Hybrid three-phase multilevel inverter based ON NPC cascaded to half-bridge cells

Experimental analysis of a cascaded multilevel inverter using Buck EIE converters

Uma nova abordagem para inversores multiníveis em cascata utilizando células de comutação EIE

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