Design Of Transformers
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Broadband Equal Power Divider
Abstract This paper presents the design of broadband two way equal power divider in microstrip medium with defected ground structure suitable for broadband communication systems. Quarter wave broadside coupled lines are used in the place of conventional transformers widely used in the popular Wilkinson power dividers. The proposed power divider structure tak
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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2. DEVELOPMENT OF INSULATING MAGNETIC OIL FOR TRANSFORMERS
The Centrais Elétricas do Norte do Brasil AS – Eletronorte, as well as other companies in the world energy sector, have problems of loss of the performance by excessive heat and even accidents with their transformers. The maintenance and accidents impact of energy supply, generating profit and more expensive insurance premiums. The transformers are essent
Publicado em: 20/07/2014
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3. Efeitos de cargas não-lineares no dimensionamento de transformadores trifásicos de distribuição / Effects of non-linear in design of three-phase distribution transformers
O uso intenso de conversores que utilizam semicondutores no processamento da energia elétrica dentro dos equipamentos elétricos e eletrônicos traz grandes benefícios como menor custo, maior eficiência e mais conforto, contudo traz também desvantagens, pois, quando conectados ao sistema de distribuição de energia elétrica produzem correntes distorcid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2012
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4. Current transformers with nanocrystalline alloy toroidal core: analytical, computational and experimental studies
In this paper are presented theoretical analysis and experimental results concerning the performance of toroidal cores used in current transformers. For most problems concerning transformers design, analytical methods are useful, but numerical methods provide a better understanding of the transformers electromagnetic behaviour. Numerical field solutions may
Mat. Res.. Publicado em: 29/05/2012
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5. âUma Proposta de Projeto Para Inversor MultinÃvel em Cascata AssimÃtrico com 63 NÃveis na TensÃo de SaÃda e OperaÃÃo em Baixa FrequÃnciaâ / "Design Proposition For a 63 Levels Output Voltage Asymmetric Multilevel Cascaded Inverter at low Frequency Operation"
This dissertation proposes a design of a cascaded multilevel inverter using H-bridge cells in asymmetric configuration and a multiple secondary transformer. Equations for determining the frequency operation of each cell with binary and ternary configurations, as well as the complete design of toroidal transformer with laminated core. This work proposes also
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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6. InteraÃÃo transitÃria entre transformadores de potencial capacitivos e linhas de transmissÃo: uma contribuiÃÃo para minimizar falhas
Coupling capacitor voltage transformers (CCVT) are widely used in power systems for monitoring, protection relays and control aplications. Failure of this equipment may cause unexpected outages of transmission lines (TL), which may result in severe penalties as imposed by the regulatory agency of the government. This fact requires speeding maintenance proced
Publicado em: 2008
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7. Generator step up transformers - specification. / Estudo sobre critérios para a especificação de transformadores elevadores de estações geradoras ("generator step-up transformers").
This work presents some constructive and operational aspects that should be take into account on the transformer design and specification. The design of the equipment is based on its technical specification. However, sometimes, it is observed that the technical specification does not contemplate some important points which could be crucial for the good trans
Publicado em: 2007
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8. Modelagem em reguladores de tensão monofásicos com 32 degraus para estudos em regime permanente e transitório
O grande crescimento do setor elétrico associado ao fato de a qualidade da energia elétrica fornecida estar se tornando um fator de extrema importância, tanto para os consumidores como para as empresas concessionárias de energia, fez com que os órgãos regulamentadores do setor passassem a se preocupar mais com, por exemplo, os níveis de tensão de uma
Publicado em: 2006
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9. SISTEMA HÍBRIDO DE APOIO À DECISÃO PARA DETECCÇÃO E DIAGNÓSTICO DE FALHAS EM REDES ELÉTRICAS / HYBRID DECISION SUPPORT SYSTEM FOR DETECTION AND DIAGNOSIS OF FAULTS IN ELECTRICAL NETWORKS
This work examines the application of hybrid systems based on Artificial Neural Networks (ANN) and Expert Systems (ES) in detecting and diagnosing faults in Electrical Systems. The research consists of three main parts: the study of cases. In the study of problem, was examined, the importance of detecting and diagnosing faults in Electrical Systems concentra
Publicado em: 1997