Hold-Up Time Compensation Circuit of Half-Bridge LLC Resonant Converter for High Light-Load Efficiency

Jeong, Yong Hwan; Lee, Minsu; Park, Jae-Do; Kim, Jae-Kuk; Rorrer, Ronald A. L.

doi:10.1109/tpel.2020.2992751

Cited by 24 publications

(4 citation statements)

References 19 publications

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“…Obviously, the equivalent impedance of CLLCLC resonant tank changes slowly with the decreasing of operation frequency, which means a smaller excitation current and higher transmission efficiency during the whole operation process. In Table Ⅰ, the comparison with the proposed converter and the converters in [24], [26], [27], and [30], including modulation strategy, frequency range, voltage range, system gain, output power, and peak efficiency, it can be seen that the proposed topology has a significant advantage in efficiency and can satisfy a wide gain while maintaining high efficiency. In addition, the voltage gain comparison with other latest existing converters under Po=200 W in Fig.…”

Section: B Parameters Conversion Of Lm To Lp-cpmentioning

confidence: 99%

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CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

Guo,

Chen,

Chen

et al. 2023

IEEE Access

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Due to the great uncertainty of the output power of renewable energy sources (RESs), the storage and reuse of RESs is the focus of new energy technology. The bidirectional DC-DC resonant converter is preferred in the new energy technology. However, the efficiency of traditional bidirectional DC-DC resonant converter will be greatly affected by the wide voltage gain range. By applying the adaptive excitation inductance, a CLLCLC resonant converter is proposed. The L-C branch is introduced to replace the fixed excitation inductance in traditional CLLLC resonant converter. In the design of transformer, the turns ratio and excitation inductance of transformer are decoupled to reduce the difficulty of transformer design. Simultaneously, compared with the traditional transformer, the impedance of equivalent excitation inductance will adjust automatically against the working frequency, decreasing the circulating current loss of resonant tank. Therefore, the proposed converter solves the contradiction between wide voltage gain range and high efficiency existed in the traditional converter. Finally, an experimental platform with 200 W rated power is built to verify the effectiveness of proposed topology.INDEX TERMS bidirectional DC-DC resonant converter, Renewable energy sources (RESs), zero voltage switching (ZVS).

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Section: B Parameters Conversion Of Lm To Lp-cpmentioning

confidence: 99%

“…Therefore, modification of the internal structure of the resonant cavity to obtain a wider input voltage range is worth investigating. The LLC converter with a variable resonant cavity for increased voltage gain range is proposed in [26]. However, the additional inductor and switch will make control more difficult and complex.…”

Section: Introductionmentioning

confidence: 99%

CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

Guo,

Chen,

Chen

et al. 2023

IEEE Access

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“…In addition, the resonant inductor can be removed by utilizing the leakage inductor of the transformer as the resonant inductor to achieve higher power density. However, small leakage inductance leads to a high ratio of the magnetizing inductance to resonant inductance, which results in low peak voltage gain [10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Center-Tapped Rectifier With Current-Balancing and Voltage-Clamped Capability for LLC Resonant Converter

Kim,

Kang

2024

IEEE Access

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A novel center-tapped rectifier with current-balancing and voltage-clamped (CBVC) capability for the LLC resonant converter is proposed. A secondary capacitor is inserted between the contact points of the rectifier diode and the secondary winding of the transformer. The amount of the current flowing through each primary switches and rectifier diodes become almost the same by adopting the CBVC center-tapped rectifier. Equal distribution of the current improves the reliability and lifetime of the primary switches and rectifier diodes. In addition, the voltage across the rectifier diodes in the CBVC center-tapped rectifier is clamped by two times the output voltage. The conduction loss of the rectifier diodes is decreased since the diodes with low forward voltage drop can be used. Moreover, half of the output capacitor is utilized as a secondary side capacitor, which means no additional components. The validity of the proposed converter is verified through experiments on a prototype for 400 VDC input to 45-70 V/4 A output application.

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“…Em Jeong et al (2020)é utilizado a técnica de variação de indutância presente em Perdigão et al (2008) para modificação da indutância magnetizante (L m ) do transformador de um conversor LLC. Modificando L m o conversoré capaz de adaptar a curva de ganho e satisfazer momentaneamente a manutenção de tensão na saída para o caso de uma falta na tensão de entrada.…”

Section: Introductionunclassified

Conversor Ressonante LLC Aplicado a um Sistema de Iluminação LED com a Utilização de um Transformador Variável

Martins¹,

Roggia²,

Seidel³

2020

Anais Do Congresso Brasileiro De Automática 2020

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Este trabalho propõe a utilização de uma técnica de variação de indutância aplicada ao transformador de um conversor ressonante LLC inserido em um sistema de iluminação LED. Têm-se como objetivo a modificação do valor da indutância magnetizante do transformador, além da relação de ganho de tensão. Esta ação torna possível o funcionamento em ressonância para uma dada faixa de dimmerização proposta, e desta fazer com que o conversor proposto trabalhe em seu ponto ótimo de desempenho. São apresentados os pontos teóricos referente ao projeto do conversor, simulações e resultados práticos da aplicação em bancada.

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Hold-Up Time Compensation Circuit of Half-Bridge LLC Resonant Converter for High Light-Load Efficiency

Cited by 24 publications

References 19 publications

CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

CLLCLC Topology Based on Adaptive Excitation Inductance for the Improvement of Bidirectional DC–DC Converter Efficiency

A Novel Center-Tapped Rectifier With Current-Balancing and Voltage-Clamped Capability for LLC Resonant Converter

Conversor Ressonante LLC Aplicado a um Sistema de Iluminação LED com a Utilização de um Transformador Variável

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