AUTOR DO BLOG ENG.ARMANDO CAVERO MIRANDA SÃO PAULO BRASIL

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS DO MAL"

"OBRIGADO DEUS PELA VIDA,PELA MINHA FAMILIA,PELO TRABALHO,PELO PÃO DE CADA DIA,PROTEGENOS  DO MAL"

“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”

sábado, 5 de março de 2011

Inverter Multilivello: Topologie circuitali e tecniche di controllo


Inverter Multilivello: Topologie circuitali e tecniche di controllo Università degli Studi di Padova FACOLTA’ DI INGEGNERIA CORSO DI LAUREA IN ELETTRONICA TESI DI LAUREA RELATORE: Prof. Meneghesso Gaudenzio LAUREANDO: Garbujo Alessio 12 Febbraio 2010 Dipartimento di Ingegneria dell'Informazione Anno Accademico 2009-2010
LA TESIS COMPLETA LO ENCUENTRAS AQUI:http://www.4shared.com/document/W7IF7QnN/tesi_finale_garbujo.html

Convertitore CC/CA per sistemi fotovoltaici connessi alla rete: progetto e realizzazione"


Convertitore CC/CA per sistemi fotovoltaici connessi alla rete: progetto e realizzazione" Ing. Pierangelo Sandri settembre 2007 siepan@libero.it Pagina 37 di 111 Capitolo 4 Progetto dell’inverter sperimentale
FULL PAPER HERE:http://www.4shared.com/document/tvozFcmG/Cap_4.html

A Novel Control Strategy for Parallel Operation of Three-phase UPS Inverters


A Novel Control Strategy for Parallel Operation of
Three-phase UPS Inverters

By Sang-Hoon Lee
Under the supervision of Prof. Dong-Seok Hyun, Ph.D.
Dept. of Electrical Engineering
The Graduate School of Hanyang University

Parallel operation of uninterruptible power supply (UPS) system has been used to
increase power capacity of the system or to secure reliable supply of power to critical loads.
During parallel operation, load sharing control to maintain the current balance is critical
for reliable operation, since load sharing is very sensitive to differences in components of
each module such as amplitude /phase difference, line impedance, and output LC filters. To
solve these problems various control algorithms have been researched. However, these
methods cannot be applied to UPS systems with different ratings. For this case, master and
slave control algorithms for parallel operation is adequate. If the ratings of UPS systems are
different, the value of passive LC filters will be different, and it will affect current sharing.
This paper presents the general problems associated with parallel operation of UPS systems,
and control strategy for parallel operation with different ratings. The validity of the proposed
control strategy is investigated through simulation and experiment with two UPS systems.
FULL PAPER HERE:http://www.4shared.com/document/_SB8U20J/UPSPARALELO2.html

Characteristic Analyses of Commercial Single-phase High-efficiency Transformers

Characteristic Analyses of Commercial Single-phase High-efficiency Transformers
Abstract   The aim of this thesis is to analyze the influence of different lamination shape and its improvement on magnetic field distribution inside the iron core of single-phase transformers.
  Traditionally, the laminated core is generally adopted and the laminated iron sheets are cut in E-shape and I-shape sheets to reduce core loss in the studied transformer. The reluctance of the magnetic flux path inside the iron core of the studied transformer is affected by the condition of press, shape of laminated core property, effective length and area of flux path. To reduce the reluctance between connection points, the E-shape and I-shape laminated sheets are interchanged to avoid obvious connection line between laminated sheets. This thesis is to simulate magnetic filed distribution of single-phase transformers using electromagnetic field software. The effectiveness of the improved E- and I-shape laminated core will be evaluated in depth for future design of single-phase low-voltage distribution transformers with high-quality, high efficiency, and low core loss.
  For simulate the inrush current, another model of single-phase transformer written by FORTRAN is compared with experience in this thesis.

FULL THESIS HERE;
http://etdncku.lib.ncku.edu.tw/ETD-db/ETD-search/getfile?URN=etd-0706104-111050&filename=etd-0706104-111050.pdf

A STUDY ON ELECTRONIC BALLAST FOR HARMONIC REDUCTION


A STUDY ON ELECTRONIC BALLAST FOR HARMONIC REDUCTION
AUTHOR: HYUN MOO LEE
ADVISOR : HEE-SEOK KOH
DEPT. OF ELECTRICAL ENGINEERING
KYUNGNAM UNIVERSITY
FUL PAPER HERE:
http://www.4shared.com/document/zkSc7EgN/ELECTRONICBALLASTHARMONIC.html

PORTAL DO MINISTÉRIO DA CIÊNCIA E TECNOLOGIA-PARTE2

PORTAL DO MINISTÉRIO DA CIÊNCIA E TECNOLOGIA1-62ª Reunião Anual da SBPC-PARTE I

12 VDC / 120 VAC POWER INVERTER SINUSWAVE


DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING 12 VDC / 120 VAC POWER INVERTER SINUSWAVE
FULL PAPER HERE:
http://www.4shared.com/document/6sQN5bGw/SineWave_Inverter_Design.html

quarta-feira, 2 de março de 2011

Smart Grids and Decarbonizing the Power Sector

StanfordUniversity | 16/04/2009 | pessoa(s) gosta(m), 0 pessoa(s) não gosta(m) February 5, 2009 lecture by Nicholas Jenkins for the Woods Energy Seminar (ENERGY301). In his talk "Smart Grids and De-Carbonising the Power Sector," Jenkins discusses the progress and implementation of smart power grids using cost-effective analysis.