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Circuitos de acionamento para iluminação semicondutora empregando topologias integradas com capacitores de longa vida útil
(Universidade Federal de Santa MariaBREngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia Elétrica, 2013-08-06)
This work presents an analysis and design of two Light Emitting Diode (LED) drivers topologies based on static switched converters aiming to avoid using electrolytic capacitors. Considering the low lifetime of electrolytic ...
Resonant (P+RES) controller applied to voltage source inverter with minimum DC link capacitor
(2011-12-28)
Voltage source inverters use large electrolytic capacitors in order to decouple the energy between the utility and the load, keeping the DC link voltage constant. Decreasing the capacitance reduces the distortion in the ...
Resonant (P+RES) controller applied to voltage source inverter with minimum DC link capacitor
(2011-12-28)
Voltage source inverters use large electrolytic capacitors in order to decouple the energy between the utility and the load, keeping the DC link voltage constant. Decreasing the capacitance reduces the distortion in the ...
Materiais nanoestruturados para eletrodo e eletrólito de supercapacitores
(Universidade Federal de Minas GeraisUFMG, 2013-02-26)
Electrochemical capacitors based on carbon nanostructured materials and ionic liquids were studied by impedance spectroscopy, cyclic voltammetry and galvanostatic charge/discharge cycles. Previously to the capacitor studies ...
Novel templated mesoporous carbons as electrode for electrochemical capacitors with aqueous neutral electrolytes
(Elsevier Science, 2017-02)
In search for new electrodes for electrochemical capacitors, two template mesoporous carbons (TMC) are prepared with the replica method by using Plugged Hexagonal Templated Silica (PHTS) and Mesostructured Cellular Foam ...
Estudo e desenvolvimento de um capacitor eletrolítico de nióbio
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Ciência e Engenharia de MateriaisProcessamento de Materiais a partir do Pó; Polímeros e Compósitos; Processamento de Materiais a part, 2012-05-11)
It seeks to find an alternative to the current tantalum electrolytic capacitors in the market due to its high cost. Niobium is a potential substitute, since both belong to the same group of the periodic table and because ...
Previsibilidade de falhas em capacitores do barramento c.c de inversores de frequência
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2012-09-21)
Initially, this work presents considerations about application of electrolytic capacitors in
the industry, especially in the inverters D.C. bus, and how important is to identify in advance
failures related to deterioration ...