https://repositorio.ufjf.br/jspui/handle/ufjf/11688
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viniciusmoraesdealbuquerque.pdf | 67.85 MB | Adobe PDF | View/Open |
Type: | Dissertação |
Title: | A study on dc-dc resonant switched-capacitor converters for LED driving and one application as a VLC transmitter |
Author: | Albuquerque, Vinícius Moraes de |
First Advisor: | Almeida, Pedro Santos |
Referee Member: | Soares, Guilherme Marcio |
Referee Member: | Braga, Henrique Antonio Carvalho |
Referee Member: | Sá Junior, Edilson Mineiro |
Resumo: | - |
Abstract: | This work presents a family of Resonant Switched Capacitor (RSC) dc-dc converters operating as both high efficiency power converter and fast-response data transmitter for Visible Light Communications (VLC) applications. By operating under soft-switching, the topologies allow for higher switching frequency and higher slew rate, so that the VLC functionality can be embedded into the power stage without an auxiliary switch, which it is a major efficiency bottleneck for higher transmission rates due to its inherent hardswitching operation. This justify new efforts in enabling Pulse-Based Transmission (PBT) without this additional switch. Seven fast-response resonant converters are presented in this work, implemented with a proposed Switched Capacitor Cell and inspired on classic DC-DC topologies (Buck, Boost, Buck-Boost, Flyback, Cuk, SEPIC and Zeta). A 10 W prototype was built to demonstrate such feasibility, operating at a switching frequency of 500 kHz, resulting in nominal efficiency of 85% during data transmission under VPPM scheme, achieving up to 100 kpbs for various brightness levels, over a distance up to 1 m. Given the switching frequency conditions, this prototype is realized using GaN-FETs and Schottky diodes. |
Keywords: | Resonant switched capacitor Dc-dc converters visible light communication |
CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
Language: | por |
Country: | Brasil |
Publisher: | Universidade Federal de Juiz de Fora (UFJF) |
Institution Initials: | UFJF |
Department: | Faculdade de Engenharia |
Program: | Programa de Pós-graduação em Engenharia Elétrica |
Access Type: | Acesso Aberto |
URI: | https://repositorio.ufjf.br/jspui/handle/ufjf/11688 |
Issue Date: | 9-Mar-2020 |
Appears in Collections: | Mestrado em Engenharia Elétrica (Dissertações) |
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