Single-Stage High Power Factor Converters Requiring Low DC-Link Capacitance to Drive Power LEDs

Fonseca, Zito Palhano da; Perín, Adriano; Agostini, Eloi; Nascimento, Claudinor Bitencourt

doi:10.1109/tie.2016.2564343

Cited by 25 publications

(4 citation statements)

References 24 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

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

Eletrônica de Potência

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“…ere is also a requirement of feedback and multiple sensors and switches for a low-voltage step-down application [22]. Interleaved converters were investigated for a higher step-down ratio.…”

Section: Introductionmentioning

confidence: 99%

Non-Isolated Power Factor Corrected AC/DC Converter with High Step-Down Voltage Ratio for Low-Power Applications

Annambhotla

Parthiban

2022

International Transactions on Electrical Energy Systems

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This paper proposes a high step-down ratio AC-DC converter employing a quadratic buck converter with power factor correction. Conventional active power factor correction topologies employ boost-based correction schemes for unity power factor operation. This will require a steeper step-down ratio and higher switch voltage stress apart from complexity in the control scheme with sensors. The structure of the proposed topology is developed by combining the power factor correction stage with a high step-down stage. The passive input filter is split up into two for the purpose of reducing the thermal heating apart from offering a higher power factor. A single switch operation reduces the complexity of the control scheme. In addition, the number of conducting devices during the current path is also the same as the conventional buck converter due to cascading and hence offers lower conduction losses. The need for the converter to operate at an extremely low duty cycle is reduced due to the quadratic stage structure. The proposed converter operates at a moderate duty cycle, offering higher step-down voltage apart from reducing filtering requirements. MATLAB R2020b is used for carrying out simulation studies. Xilinx FPGA-based controller using system generator is implemented for the generation of pulses of appropriate duty cycle. Simulation and experimental results for a 150 W prototype are presented. An investigation and comparative evaluation of the conventional bridgeless buck system with the quadratic buck converter are carried out. The proposed structure offers the benefit of a higher step-down voltage ratio incorporating an inherent power factor correction stage along with the AC/DC stage.

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“…LEDs used for commercial purposes (office and shopping mall lighting; interior decoration and street lighting etc.) commonly have 10 to 200 Watts of output power with high luminous efficiency, more than 50,000 hours of service life, mercury-free content, less emission of carbon dioxide, low response time, negligible pollution and approved stability (Fonseca, et al, 2017, Agrawal, et al, 2018, C. Y. Wu, et al, 2008. These devices satisfy the Energy Star standards C-type lighting devices with THD less than 15% and PF about 0.9 compared to conventional lighting sources (Choi, et al, 2005, Y. Li, et al, 2018, Henao, et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

Design of energy-saving driver circuit for 80 Watt LED using Flyback Converter

Deo¹,

Shrivastava²,

Chatterjee³

2022

JER is an international, peer-reviewed journal that publishes f

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Due to numerous features such as compact size, longevity, mercury-free start, and higher color rendering index, the introduction of light-emitting diode (LED) lights has changed residential and commercial lighting systems worldwide. There are two main types of LED driver configurations: single-stage (SS) and double-stage (DS). Low-power systems employ SS configuration converters, while high-power commercial systems use DS configuration converters. This study presented a discontinuous conduction mode (DCM) flyback converter with a PI controller for LED lighting, replacing double-stage converter systems. The proposed DCM-based flyback AC-DC converter includes fewer components, lower total harmonic distortions (THD), improved power factor, and high efficiency. The hardware prototype was created and tested at various AC main voltages to ensure the feasibility of the proposed model. At rated voltage 230 V, system THD is 5.2 %, power factor is 0.995, and efficiency is 92.1 %. The whole system efficiency meets the Energy Star standards.

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Single-Stage High Power Factor Converters Requiring Low DC-Link Capacitance to Drive Power LEDs

Cited by 25 publications

References 24 publications

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

Análise das Emissões Eletromagnéticas em Conversores Chaveados em Regime Transitório

Non-Isolated Power Factor Corrected AC/DC Converter with High Step-Down Voltage Ratio for Low-Power Applications

Design of energy-saving driver circuit for 80 Watt LED using Flyback Converter

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