Highly efficient and reliable DC-DC converter for smart transformer

Costa, Levy Ferreira; Buticchi, Giampaolo; Liserre, Marco

doi:10.1109/apec.2017.7930691

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…On the other hand, the new technology of Silicon-Carbide MOSFETs has emerged as a high performance and economically viable solution. These devices have been used to implement the power converters of the ST architecture in [11], [12]. However, the potential of such semiconductors is still an open question in the power electronic field.…”

Section: B Semiconductor Analysismentioning

confidence: 99%

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Comparative Analysis of Multiple Active Bridge Converters Configurations in Modular Smart Transformer

Costa

Hoffmann

Buticchi

et al. 2019

IEEE Trans. Ind. Electron.

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In this work, the quadruple active bridge dc-dc converter (QAB) is proposed to be used as a building block to implement the dc-dc stage of a Smart Transformer (ST). Different configurations (symmetrical, asymmetrical, rated for voltage/power) for this converter are considered for investigation. Four different architectures of ST, including one based on the Dual Active Bridge (DAB) converter as a benchmark and three based on the QAB converter, are presented and compared in terms of cost, efficiency, reliability and implementation complexity. As an additional contribution, different semiconductors technologies (silicon IGBT and silicon carbide MOSFETs) are evaluated in order to verify their impact on ST application. The design for each architecture is described and the results are compared. In order to validate the theoretical analysis developed in the paper, a 20 kW prototype was built and experimented.Index Terms-Dc-dc converter, multiple active bridge converter, multiwinding transformer, smart Transformer.

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Section: B Semiconductor Analysismentioning

confidence: 99%

“…The weight of copper used is determined using the volume and the copper density d cu = 8.96g/cm 3 W cu = v cu d cu (10) Then, replacing (8) in (10), the total amount of copper required is given by (11). Note that the required copper is proportional to the power processed by the winding.…”

Section: Appendix B -Price Estimation Of the Magnetic Componentsmentioning

confidence: 99%

Comparative Analysis of Multiple Active Bridge Converters Configurations in Modular Smart Transformer

Costa

Hoffmann

Buticchi

et al. 2019

IEEE Trans. Ind. Electron.

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“…1. This converter was employed in ST application in [16], focusing on the comparison of different modulation strategies. This study has shown that the QAB converter presents higher performance when the Phase Shift Modulation (PSM) scheme is used.…”

Section: Modular Smart Transformer Architecturementioning

confidence: 99%

“…This study has shown that the QAB converter presents higher performance when the Phase Shift Modulation (PSM) scheme is used. On the other hand, only an initial studies was presented in [16], without substantial results. In this context, the current work focus on the optimum multi-objective design of the QAB converter, with the aim to maximize efficiency and minimize cost.…”

Section: Modular Smart Transformer Architecturementioning

confidence: 99%

Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Costa

Buticchi

Liserre

2018

IEEE Trans. Power Electron.

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Abstract-The modular Smart Transformer (ST) is composed by several basic converters rated for lower voltage and power. In this paper the quadruple active bridge (QAB) is used as the basic block for the modular ST. In this application, the efficiency and cost are the most important design parameters. Therefore, the paper focus on the design of the converter, with the aim to optimize its efficiency, taking the cost into consideration. To do so, the losses of all components are carefully modeled and a computer-aided design is used, where an algorithm to calculate the losses and cost is developed, allowing to perform multi-objective optimization. Additionally, Silicon IGBTs and Silicon Carbide MOSFETs are considered for the design and the performance of the converter using both semiconductors technology is compared. Experimental results obtained for the optimized 20 kW QAB converter has shown an efficiency of 97.5%.

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“…Conversores CC-CC ressonantes (CR) são estruturas com aplicações em importantes áreas da eletrônica de potência, como alta tensão [1]- [6], veículos elétricos [7], fontes renováveis [8], [9], transformadores eletrônicos [10], [11], fontes de alimentação de baixa tensão [12], entre outras aplicações [13], [14]. Os conversores ressonantes se caracterizam por aproveitarem os elementos parasitas dos componentes do conversor, utilizando-os em suas etapas de operação e para realizar comutação suave, o que pode contribuir na obtenção de alta eficiência e eliminação de problemas de interferência eletromagnética.…”

Section: Introductionunclassified

Conversor CC-CC Paralelo Ressonante Meia Ponte Assimétrico com Saída em Tensão

Lazzarin¹,

Barbi²,

Delvanei³

et al. 2017

Eletrônica de Potência

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dobrador de tensão. A configuração possui número reduzido de interruptores, elimina circulação de corrente média nos elementos passivos tanto no primário quanto no secundário, e pode utilizar os parâmetros intrínsecos do transformador em seu projeto, o que a torna atrativa para aplicações como fontes de alta tensão de saída.Análise das etapas de operação, característica estática, equacionamento orientado ao projeto e a implementação de comutação sob tensão nula são abordados neste artigo. O estudo do conversor é verificado através de um protótipo de 1 kW, 400 V de entrada e 400 V de saída. O conversor apresentou rendimento elevado, acima de 97%, e comutação suave numa faixa de carga acima de 60% do valor nominal. Palavras-chave - HALF-BRIDGE PARALLEL RESONANT DC-DC CONVERTER WITH ASYMMETRICAL PWMAbstract -In this research, the study of a modified HalfBridge Parallel Resonant dc-dc converter is proposed. The proposed topology operates with constant frequency and asymmetrical PWM, such as the conventional one. The topology uses a voltage doubler rectifier in output stage, which avoid the flow of DC component current in the transformer primary. This characteristic improves the transformer design and eliminates the series capacitor, which is requred in the conventional half-bridge topology. The proposed topology also integrates the transformer parasitic elements, such as the leakage inductance and the winding capacitance in the operation, achieving zero voltage switching in transformer primary side switches, over a wide load range. Theoretical analysis, commutation analysis and design guidelines are presented in the paper. Experimental results from a 1 kW prototype, 50 kHz of switching frequency, 400 V at input voltage and 400 V A origem dos elementos parasitas ao longo do conversor está relacionada com sua aplicação. No contexto de fontes chaveadas para alta tensão, é comum o uso de transformador para conferir isolação galvânica ao projeto e elevação de ganho. Devido aos aspectos construtivos do transformador, necessários para operar com alta tensão, tais como número de espiras elevado, distância entre camadas, presença de material isolante, a presença dos elementos parasitas não pode ser desprezada, em especial da indutância de dispersão e da capacitância entre enrolamentos [3], [15], [16]. Estas podem ser responsáveis por provocar sobretensões e atrasos nas transições das tensões no transformador [17]. Já em veículos elétricos, incorporar os elementos parasitas propicia operar conversores com eficiência na ordem de 97%, com alguns exemplos encontrados em [18], [19].Um conversor CC-CC ressonante pode ser representado por três grandes blocos, conforme ilustrado no diagrama da Figura 1. Uma das principais características que diferencia os conversores ressonantes é a conexão dos elementos do circuito ressonante (também denominados de circuito tanque), sendo as configurações mais empregadas a série ressonante, a paralelo ressonante e a série paralelo ressonante [7]. Quanto ao estágio inversor de entrada, existem algu...

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Highly efficient and reliable DC-DC converter for smart transformer

Cited by 6 publications

References 26 publications

Comparative Analysis of Multiple Active Bridge Converters Configurations in Modular Smart Transformer

Comparative Analysis of Multiple Active Bridge Converters Configurations in Modular Smart Transformer

Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Conversor CC-CC Paralelo Ressonante Meia Ponte Assimétrico com Saída em Tensão

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