An Integrated High-Power-Factor Converter With ZVS Transition

Chang, Chien-Hsuan; Cheng, Chun‐An; Chang, En-Chih; Cheng, Hung‐Liang; Yang, Bo-En

doi:10.1109/tpel.2015.2439963

Cited by 31 publications

(18 citation statements)

References 36 publications

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“…Os reatores eletrônicos que utilizam topologias chargepump têm como princípio de funcionamento a integração do circuito ressonante de saída com circuito de entrada. O objetivo desses conversores é absorver energia da rede elétrica durante um período maior que os retificadores com filtro capacitivo convencionais aumentando o fator de potência, reduzindo a distorção harmônica de corrente e reduzindo a ondulação na tensão de barramento de corrente continua (CC) [12] [13]. Entretanto, para isso muitas topologias requerem um indutor na entrada do equipamento.…”

Section: Resultados Dos Ensaios De Emissõesunclassified

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

Ricobom¹,

Júnior²,

Bonfim³

2019

Revista Eletrônica de Potência

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The Current electromagnetic emissions standards, such as those produced by the CISPR committee, perform the radiated emission test of switched-mode converters only under a permanent operating regime. In this way, electromagnetic emissions generated during transients of starting or shutting down of these converters are not submitted to a control. These transients may cause electromagnetic interference issues, especially if the converters are electronic ballasts for lamps, which are usually present in a large number in the same environment and exposed to several daily cycles of

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Section: Resultados Dos Ensaios De Emissõesunclassified

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

Ricobom¹,

Júnior²,

Bonfim³

2019

Revista Eletrônica de Potência

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“…From Equation 10, relationship between ton and tf can be described as Equation (11). The average value of iLPFC over a high-frequency cycle is given, and can be expressed as [23]:…”

Section: Boost-typed Power-factor Correctormentioning

confidence: 99%

“…The input power can be obtained by taking the average of the product of the input voltage and current over one line-frequency cycle. From Equations (8) and 14, the input power can be derived as [24]: The average value of i LPFC over a high-frequency cycle is given, and can be expressed as [23]:…”

Section: Boost-typed Power-factor Correctormentioning

confidence: 99%

A Single-Stage High-Power Factor Converter with Synchronized Self-Excited Technique for LED Lighting

2018

Self Cite

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This paper proposes a single-stage, high power-factor light-emitting diode (LED) driver with a self-excited control scheme for the power switches. The self-excited mechanism is accomplished by fetching the driving voltages from a center-tapped transformer. The frequency of the driving voltages is exactly the same as the resonant frequency of the resonant converter, thus synchronizing the resonant frequency with the switching frequency and achieving zero-voltage switching (ZVS) and zero-current switching (ZCS) of power switches. The circuit topology is mainly composed of a half-bridge LC resonant converter, along with a boost-type power-factor corrector (PFC) to fulfill the single-stage structure, meaning that the presented LED driver possesses high power-factor features and low switching loss. Finally, a 40 W prototype circuit is implemented and tested, and the experimental results exhibit a satisfactory performance.

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“…Power factor correction is very popular and necessary for modern power sources in the ac grid. It decreases line current harmonics, line losses, and increases system power capacity due to reducing system reactive power flow [1][2][3]. Today, boost rectifiers are the most commonly-used circuit structures implemented for power factor correction.…”

Section: Introductionmentioning

confidence: 99%

A Step Up/Down Power-Factor-Correction Converter with Modified Dual Loop Control

Liao

2020

Energies

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A step up/down AC/DC converter with modified dual loop control is proposed. The step up/down AC/DC converter features the bridgeless characteristic which can reduce bridge-diode conduction losses. Based on the step up/down AC/DC converter, a modified dual loop control scheme is proposed to achieve input current shaping and output voltage regulation. Fewer components are needed compared with the traditional bridge and bridgeless step up/down AC/DC converters. In addition, the intermediate capacitor voltage stress can be reduced. Furthermore, the top and bottom switches still have zero-voltage turn-on function during the negative and positive half-line cycle, respectively. Hence, the thermal stresses can also be reduced and balanced. Simulation and experimental results are provided to verify the validity of the proposed step up/down AC/DC converter and its control scheme.

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An Integrated High-Power-Factor Converter With ZVS Transition

Cited by 31 publications

References 36 publications

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

A Single-Stage High-Power Factor Converter with Synchronized Self-Excited Technique for LED Lighting

A Step Up/Down Power-Factor-Correction Converter with Modified Dual Loop Control

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