Improved integrated boost-flyback high step-up converter

Spiazzi, G.; Mattavelli, Paolo; Gazoli, Jonas Rafael; Magalhaes, Renato Oliveira de; Frattini, Giovanni

doi:10.1109/icit.2010.5472596

Cited by 35 publications

(17 citation statements)

References 12 publications

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“…Geralmente, os conversores Boost-Flyback convencionais utilizam esses diodos para reduzir as ondulações de tensão que ocorrem no diodo Flyback. Esta estratégia permite o uso de diodos com tensão de bloqueio menor e reduz as perdas [24], [25]. Os diodos adicionados funcionam como grampeadores de tensão e não alteram a característica estática e dinâmica do conversor.…”

Section: Protótipo E Resultados Experimentaisunclassified

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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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Section: Protótipo E Resultados Experimentaisunclassified

“…As tensões sobre os diodos da topologia são mostradas na Figura 19 (considerando a adição dos diodos D1 e D2) [20], [24], [26]. garante redundância, pois permite a operação do sistema com metade da potência em caso de falha de um interruptor.…”

Section: Tabela VI Componentes Utilizados No Protótipounclassified

Conversor Duplo-Boost-Flyback de Alto Ganho

Cardoso¹,

Lazzarin²,

Waltrich³

2018

Eletrônica de Potência

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“…By adding voltage multiplier cell to the secondary side of flyback converter, the size of transformer can be reduced, and the performance of the converter can be improved [3]. Through adding a diode in boost-flyback converter can eliminate peak voltage stress across power switch, diode suffers from high reverse recovery losses [4]. Moreover, the transformer leakage inductor resonates with junction capacitor of secondary side diode, resulting in oscillations and high peak voltage stress.…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of a high efficiency high step-up gain DC-DC converter

Xu¹,

Chen

Zhong

2014

2014 International Power Electronics and Application Conference and Exposition

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A high efficiency high voltage step-up gain DC-DC converter is proposed and studied in this paper. The proposed converter consists of a boost converter cell and an isolated singleended PWM resonant converter cell, with their outputs connected in series to achieve high voltage step-up gain. By using quasi-resonant technology, zero current switching (ZCS) for the diode on the secondary of transformer is achieved, and the turnoff loss of power switch is also reduced. Meanwhile, the boost converter cell in the proposed converter can not only step-up voltage, but also absorbs the leakage inductor energy during the turn-off interval of power switch. Therefore, it is suitable for high step-up high efficiency conversion. The operation principle and characteristics of the proposed converter are presented and verified experimentally with a 20V input, 120V/40W output prototype.

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“…The main drawbacks of this topology, nonetheless, are high current and voltage stresses associated with the power switch, and the low efficiency due to multi-stage power processing. High gain DC-DC converters based on a coupled inductor [11][12][13][14][15][16][17][18][19][20][21] can overcome the efficiency and voltage stress problems of the aforementioned cascade converter. The coupled inductor converters achieve the high voltage gain by utilizing the coupled inductor's turn ratio, instead of cascading multiple boost stages, hence leading to the improved efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Novel Clamp-Mode Coupled-Inductor Boost Converter with High Step-Up Voltage Gain

Tattiwong¹,

Bunlaksananusorn²

2017

Journal of Electrical Engineering and Technology

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-In this paper, a new coupled inductor DC-DC converter with a high step-up voltage gain is proposed. It is developed from a clamp-mode coupled-inductor boost converter by incorporating an additional capacitor and diode. The proposed converter is able to achieve the higher voltage gain, while still retaining the switch voltage clamp property of its predecessor. In the paper, operation and analysis of the proposed converter are described. Experimental results from a prototype converter are presented to verify the validity of the analysis. The prototype circuit attains the highest efficiency of 92.8%.

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Improved integrated boost-flyback high step-up converter

Cited by 35 publications

References 12 publications

Conversor Duplo-Boost-Flyback de Alto Ganho

Conversor Duplo-Boost-Flyback de Alto Ganho

Analysis and design of a high efficiency high step-up gain DC-DC converter

A Novel Clamp-Mode Coupled-Inductor Boost Converter with High Step-Up Voltage Gain

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