Análise da transferência de ondulação de baixa frequência em drivers de LEDs
Ano de defesa: | 2019 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
Centro de Tecnologia |
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Elétrica
|
Departamento: |
Engenharia Elétrica
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/18488 |
Resumo: | This work presents the analysis of low frequency ripple transmission from the bus voltage to the output current in LED drivers, in the power control stage. The buck, boost and buck-boost converters, operating in discontinuous conduction mode, are evaluated. The main goal is to check the maximum bus voltage ripple values allowed for the proposed topology, to follow the IEEE Std. 1789-2015 recommendations. This recommendation defines the current modulation levels in lighting systems to mitigate the effects of flicker on human health. To reach this condition, a mathematical approach to determine the low-frequency ripple transfer of the proposed topologies is presented, and is used to compare three different LED models. From these analyses, the LED load 3014, composed of 96 LEDs with rated power of 20W, is selected to be simulated and experimentally implemented in three operation points of bus voltage to each topology. The efficiencies of each experimental result are also measured. The buck-boost converter was the most flexible in ripple transfer because it presented a factor of 1.75 for the entire operating range evaluated, but it had the lowest efficiencies levels, between 90.7% and 92.7%, which reduces as the bus voltage increases. When it is possible to operate the converter with high bus voltages, the buck converter becomes a good alternative, with ripple transfer levels of around two times and efficiencies above 93.5%. When the bus voltage can be small, leading to a high relationship between the output voltage and the input voltage, the boost converter is an alternative, with a ripple transfers factor up to 2.4 times and efficiencies over 93.5%. |
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2019-10-07T15:06:37Z2019-10-07T15:06:37Z2019-03-01http://repositorio.ufsm.br/handle/1/18488This work presents the analysis of low frequency ripple transmission from the bus voltage to the output current in LED drivers, in the power control stage. The buck, boost and buck-boost converters, operating in discontinuous conduction mode, are evaluated. The main goal is to check the maximum bus voltage ripple values allowed for the proposed topology, to follow the IEEE Std. 1789-2015 recommendations. This recommendation defines the current modulation levels in lighting systems to mitigate the effects of flicker on human health. To reach this condition, a mathematical approach to determine the low-frequency ripple transfer of the proposed topologies is presented, and is used to compare three different LED models. From these analyses, the LED load 3014, composed of 96 LEDs with rated power of 20W, is selected to be simulated and experimentally implemented in three operation points of bus voltage to each topology. The efficiencies of each experimental result are also measured. The buck-boost converter was the most flexible in ripple transfer because it presented a factor of 1.75 for the entire operating range evaluated, but it had the lowest efficiencies levels, between 90.7% and 92.7%, which reduces as the bus voltage increases. When it is possible to operate the converter with high bus voltages, the buck converter becomes a good alternative, with ripple transfer levels of around two times and efficiencies above 93.5%. When the bus voltage can be small, leading to a high relationship between the output voltage and the input voltage, the boost converter is an alternative, with a ripple transfers factor up to 2.4 times and efficiencies over 93.5%.Este trabalho apresenta a análise da transmissão de ondulação de baixa frequência da tensão de barramento para a corrente de saída em drivers de LEDs, no estágio de controle de potência. Os conversores buck, boost e buck-boost operando em modo de condução descontínuo são avaliados. O objetivo final é verificar os valores máximos de ondulação permitidos no barramento dos conversores para que a topologia proposta siga as recomendações da IEEE Std. 1789-2015. Esta recomendação define os níveis de modulação de corrente para mitigar os efeitos do flicker na saúde de observadores dos sistemas de iluminação. Para isso, é apresentado um procedimento de cálculo para determinar a transmissão de ondulação das topologias propostas, utilizado para comparar três diferentes modelos de LEDs. A partir dessas análises, a carga de LEDs 3014, composta por 96 LEDs e com potência nominal de 20W, é selecionada para ser simulada e implementada em três pontos de operação de tensão de barramento de cada topologia. Para uma avaliação mais ampla dos conversores, as eficiências de cada resultado experimental foram medidas. O conversor buck-boost mostrou-se o mais flexível em termos de transferência de ondulação, por possuir o fator de 1,75 vezes maior para toda a faixa de operação avaliada, porém apresenta os menores rendimentos do comparativo, entre 90,7% e 92,7%, que reduzem conforme aumenta a tensão na entrada do circuito. Quando é possível operar o conversor com tensões no barramento elevadas, o conversor buck torna-se uma boa alternativa, com níveis de transferência de ondulação de em torno de duas vezes e rendimentos acima de 93,5%. Quando a tensão de barramento pode ser pequena, levando a uma relação entre a tensão de saída e de entrada alta, o conversor boost é uma alternativa, com transferências de ondulação de até 2,4 vezes e rendimentos acima de 93,5%.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia ElétricaUFSMBrasilEngenharia ElétricaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessConversores de energiaDiodos emissores de luzDrivers de LEDFlickerOndulação de baixa frequênciaLED driversLight emitting diodesLow-frequency ripplePower convertersCNPQ::ENGENHARIAS::ENGENHARIA ELETRICAAnálise da transferência de ondulação de baixa frequência em drivers de LEDsAnalysis of low-frequency ripple transfer to LED driversinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisDalla Costa, Marco Antôniohttp://lattes.cnpq.br/4455422053321491Álvarez, José Marcos Alonsohttp://lattes.cnpq.br/2845353851318732Luz, Paulo Cesar Vargashttp://lattes.cnpq.br/3700969364643633http://lattes.cnpq.br/2861203040814157Brand, Jean Santis3004000000076004e82ca7f-4cee-4e8a-9019-64e291cdf7cdfe139f1b-e34c-47c5-9a21-29e4803a885f82e16ba3-5bad-4f9d-bfec-0498e844330da08fb442-e3f4-4ddd-9ef0-b86130112f99reponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALDIS_PPGEE_2019_BRAND_JEAN.pdfDIS_PPGEE_2019_BRAND_JEAN.pdfDissertação de Mestradoapplication/pdf2451937http://repositorio.ufsm.br/bitstream/1/18488/1/DIS_PPGEE_2019_BRAND_JEAN.pdfde0d5982df06543a1c0877c86c5c383bMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
dc.title.alternative.eng.fl_str_mv |
Analysis of low-frequency ripple transfer to LED drivers |
title |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
spellingShingle |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs Brand, Jean Santis Conversores de energia Diodos emissores de luz Drivers de LED Flicker Ondulação de baixa frequência LED drivers Light emitting diodes Low-frequency ripple Power converters CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
title_short |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
title_full |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
title_fullStr |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
title_full_unstemmed |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
title_sort |
Análise da transferência de ondulação de baixa frequência em drivers de LEDs |
author |
Brand, Jean Santis |
author_facet |
Brand, Jean Santis |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Dalla Costa, Marco Antônio |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4455422053321491 |
dc.contributor.referee1.fl_str_mv |
Álvarez, José Marcos Alonso |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/2845353851318732 |
dc.contributor.referee2.fl_str_mv |
Luz, Paulo Cesar Vargas |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/3700969364643633 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/2861203040814157 |
dc.contributor.author.fl_str_mv |
Brand, Jean Santis |
contributor_str_mv |
Dalla Costa, Marco Antônio Álvarez, José Marcos Alonso Luz, Paulo Cesar Vargas |
dc.subject.por.fl_str_mv |
Conversores de energia Diodos emissores de luz Drivers de LED Flicker Ondulação de baixa frequência |
topic |
Conversores de energia Diodos emissores de luz Drivers de LED Flicker Ondulação de baixa frequência LED drivers Light emitting diodes Low-frequency ripple Power converters CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
dc.subject.eng.fl_str_mv |
LED drivers Light emitting diodes Low-frequency ripple Power converters |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
description |
This work presents the analysis of low frequency ripple transmission from the bus voltage to the output current in LED drivers, in the power control stage. The buck, boost and buck-boost converters, operating in discontinuous conduction mode, are evaluated. The main goal is to check the maximum bus voltage ripple values allowed for the proposed topology, to follow the IEEE Std. 1789-2015 recommendations. This recommendation defines the current modulation levels in lighting systems to mitigate the effects of flicker on human health. To reach this condition, a mathematical approach to determine the low-frequency ripple transfer of the proposed topologies is presented, and is used to compare three different LED models. From these analyses, the LED load 3014, composed of 96 LEDs with rated power of 20W, is selected to be simulated and experimentally implemented in three operation points of bus voltage to each topology. The efficiencies of each experimental result are also measured. The buck-boost converter was the most flexible in ripple transfer because it presented a factor of 1.75 for the entire operating range evaluated, but it had the lowest efficiencies levels, between 90.7% and 92.7%, which reduces as the bus voltage increases. When it is possible to operate the converter with high bus voltages, the buck converter becomes a good alternative, with ripple transfer levels of around two times and efficiencies above 93.5%. When the bus voltage can be small, leading to a high relationship between the output voltage and the input voltage, the boost converter is an alternative, with a ripple transfers factor up to 2.4 times and efficiencies over 93.5%. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-10-07T15:06:37Z |
dc.date.available.fl_str_mv |
2019-10-07T15:06:37Z |
dc.date.issued.fl_str_mv |
2019-03-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/18488 |
url |
http://repositorio.ufsm.br/handle/1/18488 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
300400000007 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Engenharia Elétrica |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Elétrica |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Tecnologia |
dc.source.none.fl_str_mv |
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Universidade Federal de Santa Maria (UFSM) |
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