Bychkov Yu Basic theory The electrical circuits-Бычков Ю.А. Основы теории лектрических цепей 2002

LINK BOOK FORMAT PDF
http://www.mediafire.com/file/v5mcmxzmv176tr7/Bychkov.pdf

Contribuições ao controle eletrônico inteligente de reguladores de tensão para sistemas de distribuição de energia em 13,8 kV - RODRIGO RIMOLDI DE LIMA- Dissertação (Mestrado)-Universidade Federal de Uberlândia, Uberlândia- BRASIL

Título: Contribuições ao controle eletrônico inteligente de reguladores de tensão para sistemas de distribuição de energia em 13,8 kV Outros títulos: Contributions to the intelligent electronic control of voltage regulators for systems of energy distribution in 13,8 kV .

Data de publicação: 20-Jul-2007

 Citação: LIMA, Rodrigo Rimoldi de. Contribuições ao controle eletrônico inteligente de reguladores de tensão para sistemas de distribuição de energia em 13,8 kV. 2007. 143 f. Dissertação (Mestrado)-Universidade Federal de Uberlândia, Uberlândia, 2007. 

Resumo: O desenvolvimento proposto neste trabalho excede à operação convencional até então praticada por apresentar em seu dorso um circuito eletrônico microcontrolado que atua sobre a carga do sistema por intermédio de 09 taps de regulação (02 de abaixamento, 06 de elevação e o central) de modo totalmente independente e com grande velocidade de resposta, posto que a regulagem foi procedida com tempo limite de 04 ciclos da rede elétrica. Cada estágio de regulação proporciona uma variação de 5% sobre o valor nominal da tensão entregue à carga, estabelecendo um amplo controle para valores entre 70% e 110% do sinal fornecido à mesma. A comunicação desta com o módulo de controle mencionado é feita através de tiristores (SCR’s) com refrigeração a ar.
LINK ORIGINAL
http://penelope.dr.ufu.br/handle/123456789/333
LINK THESIS

Arquivos neste item:

Arquivo	Descrição	Tamanho	Formato
ContribuiçõesControleEletrônico_parte 1.pdf		2.38 MB	Adobe PDF	ver/abrir
ContribuiçõesControleEletrônico_parte 2.pdf		3.7 MB	Adobe PDF	ver/abrir
ContribuiçõesControleEletrônico_parte 3.pdf		3.85 MB	Adobe PDF	ver/abrir

Automatic Test System for Type Tests of the Uninterruptible Power Supply -Esa Nummijoki - Aalto University School of Electrical Engineering-HELSINKI-FINLAND

Author: Esa Nummijoki 
Title: Automatic Test System for Type Tests of the Uninterruptible Power Supply 
Date: 27.3.2012
 Language: English 

School of Electrical Engineering Thesis submitted for examination for the degree of Master of Science in Technology.
 AALTO SCHOOL UNIVERSITY  OF ELECTRICAL ENGINEERING

 Abstract of the master's thesis 

 Testing is an essential part of product development. In UPS product development, di erent tests are made every day. Testing requires large variety of measurement instruments and other equipment such as large load systems and di erent kind of test con gurations. Signi cant number of performed tests are based on the UPS type tests de ned in the IEC-62040 standard. Testing consumes a lot of time and that way also resources. To solve this problem, an automatic test system for type tests is considered. The aim of this thesis was to clarify the need for the automatic test system, and clarify requirements needed to realize it. The work was done by reviewing the type tests and di erent parts of an automatic test system. In addition, an experimentation was made, resulting a prototype. The prototype is able to automatically perform an indicative e ciency test for the UPS. Furthermore, a possibility to automate the most complex type test, a dynamic output performance test, was examined. This examination resulted a description of the test process and LabVIEW programs, supporting the execution of the test. However, the conclusion was that it is not sensible to automate the test, due to the fact that it is not often performed and automating the test requires a lot of time and resources. The review and the experimentation proved that realization of an automatic test system, able to perform all the type tests, requires large amount of time and resources. Due to this, the automatic test system for type tests is not the best solution to reduce the time and resources consumed by testing.
 Keywords: Automatic Test System, Uninterruptible Power Supply, Product Development, LabVIEW, TestStand, Prototype

LINK  
http://www.mediafire.com/file/4wzvcknlxnpip4x/TESIS_TESTE_UPS_AUTOMATICO.pdf

Electrónica de potencia: componentes, topologías y equipos Por Salvador Martínez García,Juan Andrés Gualda Gil

EXCELENTE LIBRO DE ELECTRÓNICA DE POTENCIA DE LOS INGENIEROS
Salvador Martínez García,Juan Andrés Gualda Gil

LINK BOOK DEMO GOOGLE: 
https://books.google.com.br/books?id=izwxn8edxhAC&lpg=PR3&hl=pt-BR&pg=PR3#v=onepage&q&f=false BOOK DEMO GOOGLE

Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies Yuchen Yang -Virginia Polytechnic Institute and State University

Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies Yuchen Yang
 Thesis submitted to the Faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering.

(Abstract)
 Switch mode power supplies are widely used in different applications. High efficiency and high power density are two driving forces for power supply systems. However, high dv/dt and di/dt in switch mode power supplies will cause severe EMI noise issue. In a typical front-end converter, the EMI filter usually occupies 1/3 to 1/4 volume of total converter. Hence, reducing the EMI noise of power converter can help reduce the volume of EMI filter and improving the total power density of the converter. For off-line switch mode power supplies, DM noise is dominated by PFC converter. CM noise is a more complicated issue. It is contributed by both PFC converter and DC/DC converter. While many researches have focused on reducing CM noise for PFC converter, the CM noise of DC/DC converter still remains a challenge. The main objective of this thesis is provide a solution to have best CM noise reduction for DC/DC converters. The shielding concept and balance concept are combined to propose a novel balance double shielding technique. This method can have an effective CM noise reduction in the circuit level. In addition it is easy to design and implement in the real production. The balance condition is easily controlled and guarantees effective CM noise reduction in mass production. Then, a novel one-layer shielding method for PCB winding. transformer is provided. This shielding technique can block CM noise from primary side and also cancel the CM noise from secondary side. In addition, shielding does not increase the loss of converter too much. Furthermore, this shielding technique can be applied to matrix transformer structure. For matrix transformer LLC converter, the inter-winding capacitor is very large and will cause severe CM noise problem. By adding shielding layer, CM noise has been greatly reduced. In addition, by modifying the secondary winding, the loss on shielding layer is minimized and experiments show that the total efficiency of converter has almost no impact. Furthermore, although this thesis uses flyback and LLC resonant converter as example to demonstrate the concept, the novel shielding technique can also be applied to other topologies that have similar transformer structure.

 LINK ORIGINAL WEB
https://vtechworks.lib.vt.edu/bitstream/handle/10919/49263/Yang_Y_T_2014.pdf?sequence=1