Open Circuit Voltage
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Short Circuit and Recovery Time Tests in a helical bifilar R-SFCL module
Abstract Superconducting Fault Current Limiter (SFCL) modules with distinct arrangements have been investigated, seeking design and performance enhancements. In this context, this work aims to propose a design for resistive SFCL (R-SFCL) modules, using RE-Ba-Cu-O high-temperature superconducting tapes (HTS) wound on an alternative support material. An R-SFCL
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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2. Effect of Push-Pull Ruthenium Complex Adsorption Conformation on the Performance of Dye Sensitized Solar Cells
A new series of tris-(bipyridyl)ruthenium-like complexes based on the 4-tripheylamine-2,2’:6’,2’’-terpyridine (TPA) push-pull ligand was prepared by incorporation of 4-carboxypyridine (cpy), 4,4’-dicarboxi-2,2’-bipyridine (dcbpy) and 4-carboxyterpyridine ligands (ctpy) ligands, in order to adsorb them on TiO2 in different anchoring conformations.
J. Braz. Chem. Soc.. Publicado em: 2020-11
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3. Photoelectrodes with titanate nanotubes sensitized by mesoporphyrin derivative from cashew nut shell
ABSTRACT Titanate nanotubes (TiNTs) with the chemical composition Na2Ti3O7.nH2O (NaTiNT) were obtained through a hydrothermal method in highly alkaline medium. Protonated titanates nanotubes (H-TiNTs), with the composition H2Ti3O7.nH2O, were prepared by ion exchange reaction through a suspension of Na2Ti3OγnH2O nanotubes in HCl medium, promoting the exchang
Matéria (Rio J.). Publicado em: 20/05/2019
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4. Uma Metodologia para Análise da Distribuição de Contagem dos Picos de Tensão de Reignição para Avaliação da Estabilidade do Processo GMAW Curto-Circuito
Resumo A estabilidade do arco tem sido estudada através de análises estatísticas obtidas dos sinais de tensão de arco e corrente de soldagem. Histogramas e cálculo de estatísticas dos parâmetros tempo de arco aberto e tempo de curto circuito são meios de avaliação da estabilidade dos processos de soldagem. Contudo, estudos relacionados aos picos de
Soldag. insp.. Publicado em: 09/05/2019
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5. Theoretical study of c-GaN/GaAs single heterojunction solar cells
ABSTRACT In this work a theoretical study of electrical behavior for a c-GaN/GaAs heterostructure as a photovoltaic device through a two-dimensional (2D) finite element numerical simulation is presented for a first time. I-V curves and electrical parameters like short circuit current (Isc), open circuit voltage (Voc), fill factor (FF) and efficiency (η) wer
Matéria (Rio J.). Publicado em: 02/10/2017
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6. Electrophoretic fabrication of ZnO/ZnO-CuO composite for ammonia gas sensing
Nanostructured deposits of ammonia (NH3) sensitive ZnO and ZnO-CuO composites were fabricated on a graphite electrode via electrophoretic deposition (EPD). Deposition was done by holding the applied voltage and deposition time constant at room temperature. Testing of sensing properties of the deposits was conducted using Wheatstone bridge circuit. SEM microg
Mat. Res.. Publicado em: 04/07/2014
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7. Otimização e comparação de processos para formação do campo retrodifusor com boro em células solares
The aim of this thesis was to develop and compare methods for the formation of the back surface field and emitter with boron using n-type and p-type solar-grade Si-Cz wafers as well as analyze and optimize a manufacturing process of solar cells with structure n+pp+ and back surface field formed by boron. The highly doped p+ region was formed by spin-on depos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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8. Desempenho de um painel fotovoltaico de baixa tensão, acoplado ao protótipo de um conversor dc/dc topologia Booster
Low voltage solar panels increase the reliability of solar panels due to reduction of in series associations the configurations of photovoltaic cells. The low voltage generation requires DCDC converters devices with high efficiency, enabling raise and regulate the output voltage. This study analyzes the performance of a photovoltaic panel of Solarex, MSX mod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2010
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9. Modelamento matemático do processo de soldagem GMAW
This thesis describes the development and validation of a mathematical model that describes the electrical and operational behavior of GMA welding. Initially it was developed a static model that was able to simulate welding conditions characterized by small current and tension variation usually found with free-flight metal transfer. Afterwards, a dynamic mod
Publicado em: 2010
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10. Calculo dos parametros de linhas de transmissão trifasicas atraves das tensões e correntes em seus terminais / Calculation of parameters of thress-phase transmission lines through voltages and currents in their terminals
The objective of this work is to calculate the longitudinal and transversal transmission line parameters using phase currents and voltages. Developed equations are used, in the modal domain, considering current and voltages found between a line terminal and an open line terminal, and a short-circuit terminal. . Initially, the basic transmission line theory i
Publicado em: 2009
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11. EstatÃstica de contagem de carga e efeitos de interferÃncia em sistemas mesoscÃpicos
In this thesis we presented a detailed study about full counting statistics of transmitted charge and accumulated phase and the quantum interference corrections to the average conductance and the average shot-noise power in non-ideal ballistic chaotic cavities. In the theoretical analysis of this mesoscopic system, we obtained analytical expressions for the
Publicado em: 2009
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12. Determination fo the configuration of excited Alfvén waves in tokamak TCABR / Determinação da configuração de ondas de alfvén excitadas no tokamak TCABR
In order to enhance the efficiency of the TCABRs Alfvén waves heating system, called AWES - Alfvén Waves Excitement System a diagnostics for determining the radio-frequency power applied to the plasma and a processing circuit for the magnetic coil system was built, characterized, installed and put into operation. The RF diagnostics system was designed to d
Publicado em: 2007