“SE SEUS PROJETOS FOREM PARA UM ANO,SEMEIE O GRÂO.SE FOREM PARA DEZ ANOS,PLANTE UMA ÁRVORE.SE FOREM PARA CEM ANOS,EDUQUE O POVO.”

“Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance. Will Durant”

OBRIGADO DEUS PELA VIDA,PROTEGENOS E GUARDANOS DE TODO MAL


AUTOR DO BLOG ENG. ARMANDO CAVERO MIRANDA SAO PAULO BRASIL

quarta-feira, 28 de outubro de 2015

Development of Three-phase On-Board Battery Charger for PHEV ( plug-in hybrid electrical vehicle ) without High-Capacity Electrolytic Capacitor Graduate School, Myongji University Department of Electrical Engineering ZHANG YINGHAO




Development of Three-Phase On-Board Battery Charger for PHEV without High-Capacity Electrolytic Capacitor Ying-hao, Zhang Department of Electrical Engineering Graduate School, Myongji University Advisor Professor Byung-Moon Han
A new two-stage on-board battery charger which can operate in both three-phase mode and single-mode is proposed for plug-in hybrid electric vehicles (PHEVs). It consists of three identical chargers which connect to battery in parallel, and each of them has a cascaded structure of high frequency resonant converter with a constant switching frequency for electrical isolation, and buck-boost converter for charging control and harmonic regulation of input current under wide range line-input voltage. This structure uses small link capacitors so that high-capacity electrolytic capacitors can be removed in automotive applications. An LLC resonant converter is proposed in the first stage. The parallel buck-boost converters operating in discontinuous conduction mode are employed in the second stage, so that the voltage stress of components could be reduced and the simple controller can be used to control charging current. Digital control of converter is realized by applying DSP (Digital Signal Processor) that performs constant current through duty control of buck-boost converter. Duty ratio of LLC converter is unregulated. Proposed Converter stably operates in various load condition (within 10kW) and it is proven that the proposed converter achieves efficiency of higher than 93% and power factor of higher than 0.99 through experiment..

LINK
http://www.mediafire.com/view/0r5lad355h3odb9/Development_of_Three-phase_On-Board_Battery-28-10-2015%282%29.pdf

sábado, 17 de outubro de 2015

ELECTROMAGNETISMO - CLAUDIO GRAÇA-CURSO DE ENGENHARIA MECANICA UNIVERSIDADE FEDERAL DE SANTA MARIA BRASIL


HOJE SURFANDO NA WEB ENCONTRE ESTE INTERESANTE LIVRO EM PORTUGUES DO PROFESSOR CLAUDIO GRAÇA DA UNIVERSIDADE FEDERAL DE SANTA MARIA  NA
SIGUENTE PAGINA WEB PODEM CONFERIR:
http://coral.ufsm.br/cograca/eletro12
LINK ALTERNATIVO
https://copy.com/JEd3vsLmNYRfGiLp
AGRADECIMENTO ESPECIAL AO PROFESSOR CLAUDIO GRAÇA  Curso de Engenharia Mecânica  POR DISPONIBILIZAR LIVREMENTE ESTE LIVRO EN SUA PAGINA NA WEB,ELE ESTA REALIZANDO UM PROJETO DE ENSINO A CURTA DISTANCIA DE FISICA PODEM CONFERIR ESTE GRANDIOSO PROJETO NAS PAGINAS WEB SIGUENTES:
LINK1
http://coral.ufsm.br/cograca/livro.htm
LINK2
http://coral.ufsm.br/cograca/

COLEÇÃO DE PROVAS ENG04074 - Teoria de Circuitos I - Universidade Federal do Rio Grande do Sul Escola de Engenharia Departamento de Engenharia Elétrica-BRASIL



1. IDENTIFICAÇÃO. Nome do Departamento: DELET - DEPARTAMENTO DE ENGENHARIA ELÉTRICA (http://www.ufrgs.br/delet/) Nome da Atividade de Ensino: - ENG04074 - TEORIA DE CIRCUITOS I Cursos(s) de Oferecimento: - ENGENHARIA ELÉTRICA Caráter: - Obrigatória Pré-requisitos por Curso: FIS01182 – FÍSICA GERAL - ELETROMAGNETISMO MAT01354 – CÁLCULO E GEOMETRIA ANALÍTICA II-A

LINK ORIGINAL COM TODAS AS PROVAS
http://www.ufrgs.br/eng04030/Provas/index.htm

EEL420 - Circuitos Elétricos I - Engenharia Biomédica UFRJ - UNIVERSIDADE FEDERAL DE RIO DE JANEIRO BRASIL





COLEÇÃO DE PROVAS CIRCUITOS ELETRICOS EEL420

Provas Anteriores-EXAMENES ANTERIORES

 2007/2, 2008/12008/22009/12011/22012/22014/1,2014/2 e 2015/1.

LINK ORIGINAL DE ENGENHARIA BIOMEDICA
http://www.peb.ufrj.br/cursos/eel420/eel420.htm

quarta-feira, 14 de outubro de 2015

CORPE(Center of Reliable Power Electronics) - A Reliable Future Comes From Reliable Ideas

WDS - Power Supply Design Software



Design stable analog and digital power supplies in minutes!
Stabilising a power supply using WDS could not be simpler. The user simply selects their topology and types in their input/output specification into WDS. The software will then automatically select the appropriate component values for this design. At any stage the user can change the component values away from those automatically calculated by WDS and enter the actual component value used in their design. From power stage component selection to poles, zeros and controller coefficients; our advanced PSU design software, WDS, will greatly simplify the task of designing a power supply whilst still keeping you in control at every stage of the process. WDS has been designed as the ultimate toolbox for the power supply design engineer. Designs and stabilises analog and digital PSU control loops in minutes Automatically calculates poles and zeros as well as component values of the worlds most popular topologies Sophisticated control algorithms stabilise digital power supplies with automatic coefficient calculations for floating point, 32 bit and 16 bit processors Special features allow manipulation of digital compensator coefficients for a host of micro-controllers Automatic compensator design for isolated power supplies with TLx431/LMx431 and a host of industry standard optocouplers Simulations in time domain, frequency domain and ability to superimpose real measurements on simulated data

LINK
http://www.biricha.com/wds

TEORIA DO ELECTROMAGNETISMO KLEBER DAUM MACHADO


NAVEGANDO HOJE ENCONTRE NA WEB ESTE INTERESANTE LIVRO DE TEORIA DO ELECTROMAGNETISMO DO PROF. KLEBER MACHADO
PAGINA WEB ORIGINAL NA WEB
http://nead.uesc.br/arquivos/Fisica/eletromagnetismo/Kleber-Daum-Machado-Teoria-do-Eletromagnetismo-Vol3.pdf

sábado, 10 de outubro de 2015

Power electronic transformers for AC-AC and AC-DC conversion with reduced number of switches Castelino, Gysler Fatima (2013)


Autor Castelino, Gysler Fatima Data 2013-08
Type Thesis or Dissertation
Resumo In this research, a novel reduced-switch Power Electronic Transformer is proposed for three-phase power conversion (three-phase AC to AC as well as three-phase AC to DC). The goal of this project is to reduce the weight and size of the power converter by replacing the low-frequency transformers with high-frequency transformers (HFTs). The novelty of these proposed topologies is that they have only two controlled switches on the primary side of the high-frequency transformers. Additionally, these switches operate at 50% duty ratio, hence they are easy to control. Pulse Width Modulation (PWM) control is only necessary in the converters on the secondary side of the HFT. The modulation strategies proposed in this work achieve nearly Zero Current Switching (ZCS) for these two primary switches. In the proposed three-phase AC to AC Power Electronic Transformer, a Matrix Converter (MC) is employed on the secondary side of the transformer. Matrix converter with nine four-quadrant switches is a `more-silicon' and nearly capacitor-less solution for AC to AC conversion. This single-stage AC-AC converter without any electrolytic capacitors translates to higher reliability and efficiency. High-frequency transformers have finite leakage inductance, hence, any switching in the primary or secondary of the transformer requires commutation of the transformer inductive currents. This problem of leakage energy commutation and the required protection are studied in detail in this thesis. Other features of this converter are bi-directional power flow and power factor correction. The second Power Electronic Transformer is proposed for three-phase AC to DC power conversion. This converter operates on the Dual Active Bridge (DAB) principle wherein the transformer leakage inductance is used for power transfer. Hence, this converter does not suffer from problems associated with leakage energy commutation and additional snubber circuits are not required for this converter. The proposed modulation provides the advantages of unity power factor on the AC side, galvanic isolation and bi-directional power flow capability. Both these PETs have been analyzed and simulated. Laboratory prototypes have been built and tested to verify the advantages of the proposed PETs.
LINK ORIGINAL
http://conservancy.umn.edu/handle/11299/157756
LINK FULL PAPER
http://conservancy.umn.edu/bitstream/handle/11299/157756/Castelino_umn_0130E_14251.pdf?sequence=1&isAllowed=y

quinta-feira, 8 de outubro de 2015

Ulianov Los problemas de los transitorios electromagnéticos en sistemas de energía


Ulianov  Los problemas en los transitorios electromagnéticos en sistemas de energía
El libro contiene muchos problemas típicos característicos encontrados en la práctica. En su mayor parte son soluciones completas y resueltas.

LINK
http://www.mediafire.com/view/5136iwd56ujpvuc/Ulianov_-_Los_problemas_en_los_transitorios_electromagn%C3%A9ticos_en_sistemas_de_energ%C3%ADa.pdf

terça-feira, 6 de outubro de 2015

Berezkina Book of problems in the general electrical engineering with the fundamentals of electronics



Book of problems in the general electrical engineering with the fundamentals of electronics.

Electrical Circuit Theory and Technology Por John Bird



LINK BOOK GOOGLE DEMO
https://books.google.com.br/books?id=GEooiRUHOPsC&lpg=PP1&hl=pt-BR&pg=PP1#v=onepage&q&f=false

Fundamentals Of Electric Circuits ( 5th Ed)


ESTE IMPORTANTE LIBRO DE ANALISIS DE CIRCUITOS LOS ENCONTRARAS EN LA GRANDE COLECCION DE LIBROS GRATUITOS Internet Archive BookReader 
About the InternetArchive
 The Internet Archive is a 501(c)(3) non-profit that was founded to build an Internet library. Its purposes include offering permanent access for researchers, historians, scholars, people with disabilities, and the general public to historical collections that exist in digital format.Founded in 1996 and located in San Francisco, the Archive has been receiving data donations from Alexa Internet and others. In late 1999, the organization started to grow to include more well-rounded collections. Now the Internet Archive includes: texts, audio, moving images, and software as well as archived web pages in our collections, and provides specialized services for adaptive reading and information access for the blind and other persons with disabilities.
 LINK ORIGINAL
https://archive.org/details/FundamentalsOfElectricCircuits5thEdgnv64_201406
LINK DIRECTO
https://archive.org/download/FundamentalsOfElectricCircuits5thEdgnv64_201406/Fundamentals%20of%20Electric%20Circuits%20(5th%20Ed)(gnv64).pdf

TEXTBOOK SOLUTION FOR FUNDAMENTALS OF ELECTRIC CIRCUITS CHARLES ALEXANDER 5Th EDITION 2149 STEP-BY-STEP SOLUTIONS


LINK ORIGINAL NA WEB TEXTBOOK SOLUTION FOR FUNDAMENTALS OF ELECTRIC CIRCUITS
https://www.chegg.com/homework-help/fundamentals-of-electric-circuits-5th-edition-solutions-9780073380575

Vladimir Bondarenko Fundamentos de la teoría de circuitos. Parte 2



Los transitorios en los circuitos eléctricos lineales. Método OPERACIONAL de cálculo de transitorios. Análisis de circuitos eléctricos con una señal de entrada arbitraria. Frecuencia (espectral) método para el análisis de circuitos eléctricos con una señal de entrada arbitraria. Circuitos no lineal con ARMONICOS. Los circuitos eléctricos con parámetros distribuidos. La síntesis de circuitos.
LINK FULL PAPER
http://www.mediafire.com/view/31tl56ci0tbscz5/Bondarenko-CIRCUITOS_ELECTRICOS_II.pdf