Step-up inverter conceived by the integration between a Full-Bridge inverter and a Switched Capacitor Converter

Pont, Neilor Colombo Dal; Vecchia, Mauricio Dalla; Waltrich, Gierri; Lazzarin, Telles Brunelli

doi:10.1109/cobep.2015.7420138

Cited by 3 publications

(1 citation statement)

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“…To extend the capabilities of traditional power electronics converters, a clear trend is visible towards topologies that implement more switches and capacitors to achieve higher power densities compared to traditional designs that rely on magnetics [67]. Numerous examples can be found in high step-down converters [68][69][70], high step-up converters [56,71,72] and PV or wind power inverters [73][74][75][76].…”

Section: Methodsmentioning

confidence: 99%

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

et al. 2020

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State-of-the-art reliability assessment typically starts from a given circuit topology, for which the most suitable components are selected using a Physics of Failure analysis. This paper, however, addresses the topology selection stage, which is the foundation in designing reliable converters. Based on an overview of the reliability performance of different components, a methodology is presented as a guideline for comparing topologies to one another. The focus is directed at practical consequences associated with certain designs. Furthermore, an overview is provided on the latest developments in component technology reliability improvements. The developed methodology is mainly intended for demanding applications, where long lifetimes are required or elevated ambient temperatures are present. After the topology selection, an overview of possibilities is given that allows further increasing converter availability. Finally, the methodology is applied to the design of module level converters for building integrated photovoltaics, which is a high temperature application with a high desired lifetime. A prototype and experimental results are presented.

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Section: Methodsmentioning

confidence: 99%

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

et al. 2020

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Transformerless Step-Up Inverter Based On Switched-Capacitor Converter Technology

Lazzarin¹,

Pont²,

Waltrich³

2017

Eletrônica de Potência

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-In this paper the integration between a voltage source inverter (VSI) and a switched capacitor converter (SCC) is proposed to generate a sinusoidal waveform with a double peak voltage value at the converter output terminal, without the use of a transformer or a dc-dc boost converter. The novel structure (VSI-SCC) is designed as a transformerless step-up inverter with linear gain. VSI and SCC models are individually characterized to integrate both structures in only one model. To validate the theoretical analysis a prototype was designed for a power of 1 kW, considering a dc input voltage of 200 V and an ac output voltage of 220 V (rms). In this prototype the VSI converter supplies 110 V (rms) to the SCC converter, and this converter step-up it to 220 V (rms). Furthermore, open and closed-loop control were also tested in the prototype reaching a maximum efficiency of 90%.

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Inversor Boost a Capacitor Chaveado Conectado à Rede Elétrica

Andrade¹,

Silva²,

Coelho³

et al. 2018

Eletrônica de Potência

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Resumo-Neste artigo propõe-se o emprego do inversor boost diferencial a capacitor chaveado (SCDBI) em aplicações que requerem conexão com a rede elétrica. O SCDBI é um inversor elevador, cujo ganho pode ser aumentado a partir da adição de células a capacitor chaveado, e possui saída em tensão, o que permite injetar correntes na rede com baixa ondulação usando apenas um filtro L. Esses atributos favorecem o emprego da topologia em sistemas de estágio único, onde a tensão de entrada é menor que o valor de pico da tensão de saída. Alguns dos desafios atrelados ao uso do SCDBI estão relacionados à característica de ganho não linear e aos modelos dinâmicos de ordem elevada. Neste artigo, é proposta uma modelagem simplificada e uma técnica de linearização estática, que possibilitam a utilização de um controlador proporcional-integral e uma malha de feedforward para controlar a corrente injetada na rede elétrica. O trabalho também aborda a análise estática do conversor com modulação unipolar e apresenta os procedimentos de dimensionamento. A validação do estudo é feita através dos resultados obtidos a partir de um protótipo de 250 W, conectado à rede de 220 V eficaz, com tensão de entrada de 60 V, frequência de comutação de 50 kHz, rendimento de 90% e corrente de saída com THD menor que 5%.

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Step-up inverter conceived by the integration between a Full-Bridge inverter and a Switched Capacitor Converter

Cited by 3 publications

References 10 publications

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

Transformerless Step-Up Inverter Based On Switched-Capacitor Converter Technology

Inversor Boost a Capacitor Chaveado Conectado à Rede Elétrica

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