Hybrid Nonisolated DC–DC Converters Derived From a Passive Switched-Capacitor Cell

Vecchia, Mauricio Dalla; Salvador, Marcos Antonio; Lazzarin, Telles Brunelli

doi:10.1109/tpel.2017.2703912

Cited by 34 publications

(34 citation statements)

References 35 publications

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“…The topologies derived from the HACC have the input and output connections described in Table I. With these connections, a family of three new nonisolated dc-dc converters is generated, as is shown in A similar approach was proposed in [11], where a hybrid commutation cell was derived from a passive switchedcapacitor cell (implemented only with diodes). The two commutation cells are similar, with the ladder configuration and the same number of semiconductors, however, the proposed HACC uses three active and one passive switch while the commutation cell in [11] employs one active and three passive switches.…”

Section: Integration Of An Active Switch Capacitor Cell With Thmentioning

confidence: 99%

“…On the other hand, the conventional converters present good output voltage regulation, but are not capable of providing a high conversion ratio. Hence, the integration between SC and conventional circuits could allow the combination of the advantages of the two groups of converters while overcoming the drawbacks [7], [11], [26]. This new family of converters is referred to in the literature as hybrid converters.…”

Section: Introductionmentioning

confidence: 99%

“…In general, SC cells are integrated with conventional converters to generate new topologies [7], [11], [28]- [30]. However, this concept was approached in relation to commutation cell, and a passive ladder SC cell was integrated with conventional commutation cell [11]. The new converters are analyzed through the commutation cell.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed cell generate three hybrid converters of different types: hybrid buck, hybrid boost and hybrid buck-boost. These structures present modified static gain in relation to [11] and the conventional converters. Hence, they have advantages that can be used in certain applications and thus, they can expand the range of applications of hybrid converters.…”

Section: Introductionmentioning

confidence: 99%

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Proposal, Analysis and Experimental Verification of Nonisolated DC-DC Converters Conceived from an Active Switched-Capacitor Commutation Cell

Vecchia¹,

Andrade²,

Pont³

et al. 2019

Eletrônica de Potência

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This paper introduces a new family of nonisolated dc-dc converters that are generated by the integration of the active switched-capacitor (ASCC) and the conventional commutation cell (CCC). Based on the commutation cell concept, the new conceived hybrid active commutation cell (HACC) provides three different types of hybrid converters: buck, boost and buck-boost. All three converters are investigated in this study through the following approaches: topological stages, static gain analysis considering the switched-capacitor features, generalization of the HACC and gain for M cells and steady-state analysis. The buck version presents a high conversion rate, which demonstrates that it has potential for step-down applications. To verify the proposed topologies, a prototype was built with the following specifications: 600 V input voltage, 150 V output voltage, 70 kHz switching frequency and 1 kW rated power. Efficiency close to 95% was obtained at 1 kW for the buck topology, which demonstrates that the proposed HACC can provide gain and high efficiency at the same time.

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Section: Integration Of An Active Switch Capacitor Cell With Thmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Proposal, Analysis and Experimental Verification of Nonisolated DC-DC Converters Conceived from an Active Switched-Capacitor Commutation Cell

Vecchia¹,

Andrade²,

Pont³

et al. 2019

Eletrônica de Potência

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“…Os conversores mais comuns utilizados para essas aplicações são o Boost clássico [6], Boost interleaved [7], Boost quadrático [8], Z-source Boost [9], técnicas de células multiplicadoras [10]- [16], conversores em cascata [17] e o conversor Boost-Flyback [18], [19].…”

Section: Ci(s)unclassified

Conversor Duplo-Boost-Flyback de Alto Ganho

Cardoso¹,

Lazzarin²,

Waltrich³

2018

Eletrônica de Potência

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Resumo -Um conversor CC-CC não isolado de alto ganho é proposto nesse artigo, o qual é denominado Duplo-Boost-Flyback de Alto Ganho pelo fato de combinar dois conversores Boost-Flyback convencionais, conectados em paralelo na entrada e com saída flutuante. Essa nova topologia aumenta o ganho estático do conversor e reduz a ondulação da corrente de entrada. A topologia proposta é ideal para aplicações com fontes de alimentação com baixa tensão que precisam elevar consideravelmente a tensão para ser utilizada, como por exemplo, arranjos fotovoltaicos, células combustíveis e baterias. Este artigo apresenta princípio de operação, ganho estático, estratégia de controle e exemplo de projeto. A verificação experimental foi realizada a partir de um protótipo de 1 kW com tensão de entrada de 48 V e saída de 800 V, alcançando o ganho estático de 16,7. A eficiência máxima apresentada foi de 94,6% com 70% da carga e 93,9% com carga nominal.Palavras-Chave -Boost-Flyback, Conversor de Alto Ganho, Conversor CC-CC, Energia Renovável, Indutor Acoplado. HIGH GAIN DOUBLE BOOST-FLYBACK CONVERTERAbstract -A high gain step-up non-isolated dc-dc converter is proposed in this paper, named as high stepup Double Boost-Flyback, the topology combines two conventional Boost-Flyback converters in input-parallel and floating-output connections. The new topology increases the static gain and reduces the input current ripple in relation to the conventional Boost-Flyback topology. The proposed converter has potential to be used in low input voltage applications that requires a high gain as such as systems powered by photovoltaic panels, fuel cells and low voltage batteries. This paper presents principle of operation, static gain, control strategy, and design example. The experimental verification was carried out in a prototype of 1 kW with input and output voltage of 48 V and 800 V, respectively, reaching a static gain of 16.67. A maximum efficiency of 94.6% was achieved at 70% of load and 93.9% at rated load. A diversificação da matriz energética mundial tem crescido com o uso de energias renováveis como, por exemplo: painéis solares, geradores eólicos, energia maremotriz, geotérmica entre outras. Keywords -Alguns sistemas de energia renovável possuem baixos níveis de tensão de saída (entre 10 V e 50 V), portanto, precisam utilizar conversores CC-CC de alto ganho [1]-[5] para adequar suas tensões de saída para níveis usuais. Por exemplo, para a conexão com a rede elétrica que possui níveis de 127 V e 220 V RMS a tensão de saída dos sistemas deve ser adaptada para aproximadamente 200 V (para redes de 127 V rms) ou 400 V (para 220 V rms). Além disso, os níveis de tensão reduzidos na entrada fazem com que esses conversores operem com correntes elevadas, o que aumentam as perdas de comutação e de condução e, consequentemente, degradam a eficiência do sistema. Ganhos elevados e alta eficiência são os principais desafios dos conversores CC-CC.Os conversores mais comuns utilizados para essas aplicações são o Boost clássico [6]

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Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

Goudarzian

Khosravi

Raeisi

2020

Int Trans Electr Energ Syst

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Summary Conventional boost converters used for fuel‐cell applications suffer from a slow dynamic response, due to their non‐minimum phase nature. It is the main challengeable problem in the development of boost topologies working in continuous‐conduction mode (CCM). In order to eliminate the mentioned disadvantage, a boost converter is proposed in this article which is capable to give a high voltage gain. From viewpoint of the boosting feature, the proposed topology is more appropriate to connect a low input voltage to a higher dc voltage of load. Moreover, the duty‐cycle‐to‐output‐voltage transfer function of this converter is free from the right‐half‐plane zero (RHPZ) and therefore, its dynamics are simpler and faster compared with the classical boost converter. To cancel the RHPZ, improve the dynamic behavior and enhance the voltage transfer gain, a separate forward path is provided using a transformer and an additional capacitor in the output node for transferring the input energy to the output load during the switch‐on time interval of the power switch. For derivation of the converter model, the steady state analysis is given in details and the required equations are formulated. The transfer function expression is obtained using the averaging model of the converter and then, the description and comparisons are introduced to reveal the features and superiority of the proposed converter. Also, a laboratory set‐up of the suggested dc/dc boost converter working in CCM is built and tested.

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Hybrid Nonisolated DC–DC Converters Derived From a Passive Switched-Capacitor Cell

Cited by 34 publications

References 35 publications

Proposal, Analysis and Experimental Verification of Nonisolated DC-DC Converters Conceived from an Active Switched-Capacitor Commutation Cell

Proposal, Analysis and Experimental Verification of Nonisolated DC-DC Converters Conceived from an Active Switched-Capacitor Commutation Cell

Conversor Duplo-Boost-Flyback de Alto Ganho

Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

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