Buck quasi-resonant converter operating at constant frequency: analysis, design, and experimentation

Barbi, I.; Bolacell, J.C.O.; Martins, Denizar Cruz; Líbano, F.B.

doi:10.1109/63.56518

Cited by 155 publications

(29 citation statements)

References 2 publications

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“…Another significant drawback of the switch-mode operation is the EMI produced due to large di/dt and dv/dt. To overcome these short comings, new families of QRCs are introduced [1]- [2].Few research papers have been presented about the design and implementation of push-pull hard switched and Quasi-resonant converters [3]- [5].Push-pull converters is mainly used for medium and high power applications compared to half-bridge and full-bridge converter. It has wide duty ratio control and it can be used for multi-output applications with low output and input ripple current.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Push-pull Multi-output Quasi-resonant Converter

Anitha¹,

Arulselvi²

2014

IOSRJEEE

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Section: Introductionmentioning

confidence: 99%

Simulation of Push-pull Multi-output Quasi-resonant Converter

Anitha¹,

Arulselvi²

2014

IOSRJEEE

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“…Como os conversores quase-ressonantes com modulação por largura de pulso (PWM-QRC) operam com freqüência de chaveamento constante, eles não apresentam o problema referente ao controle, encontrado nos QRCs , Barbi et al (1989). Entretanto, eles apresentam todas as outras desvantagens dos QRCs, limitando, assim, suas aplicações.…”

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Conversor Boost PWM Entrelaçado com Comutação Suave

2002

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IntroduçãoAltas freqüências de chaveamento provocam uma redução do peso e tamanho dos componentes magnéticos de um conversor CC-CC. No entanto, as altas freqüências também causam maiores perdas na comutação e uma maior interferência eletromagné-tica (EMI -eletro magnetic interference), tendo como conseqüência um baixo rendimento em conversores com comutação dissipativa. ResumoEste artigo apresenta uma topologia aprimorada de um conversor Boost PWM com comutação suave. O circuito proposto, tendo duas chaves ativas entrelaçadas, opera com chaveamento suave, sob modulação PWM (pulse-width-modulation). Além disso, este conversor fornece alta rendimento sob as condições de operação, para uma larga variação de carga, e operando à altas freqüências. Para ilustrar o princípio de operação deste novo conversor apresenta-se um estudo pormenorizado, incluindo simulações e resultados. A validade deste novo conversor é confirmada por meio dos resultados obtidos. Palavras-chave: entrelaçado boost. AbstractThis article presents an improved topology of an interleaved Boost PWM soft switch converter. The proposed circuit, having two active switches interleaved, is able to operate with soft switching in a pulse-width-modulation (PWM) way. In addition, such converter provides a high efficient operating condition for a wide load range at high-switching frequency. In order to illustrate the operational principle of this new converter, a detailed study, including simulations as well as experimental results, is carried out. The validity of this new converter is guaranteed by the obtained results. Key words: interleaved boost. simplesmente desviar as perdas nos elementos ativos na abertura ou fechamento, encontram-se referências acerca dos snubbers em Calkin et al.(1976), McMurray (1980) e Obashi (1983.Mais tarde surgiram os conversores quase-ressonantes (QRCs), citados por Lee (1988). Entretanto, algumas de suas características, tais como limitação de carga e dificuldades de controle (devido à freqüência de operação variável), restringiram o uso desses conversores.

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“…After, the QRC-PWM converters were proposed in [7]. These converters do not have control problems but they contain all the others disadvantages of the QRC.…”

Section: Introductionmentioning

confidence: 99%

PWM Soft-Switched Converters With A Single Active Switch

et al. 1997

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This paper presents several converters which, having only a single active switch, are able to operate with PWM characteristics in a soft switching way. In addition such converters can work in high switching frequencies for wide load range without great limitations. In order to illustrate the operating principles of these converters a detailed analysis, including simulations and experimental tests are carried out. The validity of these converters is assured by the obtained results.

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Buck quasi-resonant converter operating at constant frequency: analysis, design, and experimentation

Cited by 155 publications

References 2 publications

Simulation of Push-pull Multi-output Quasi-resonant Converter

Simulation of Push-pull Multi-output Quasi-resonant Converter

Conversor Boost PWM Entrelaçado com Comutação Suave

PWM Soft-Switched Converters With A Single Active Switch

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