AUTOR DO BLOG ENG.ARMANDO CAVERO MIRANDA SÃO PAULO BRASIL

GIF 1 GIF 2

“GRAÇAS A DEUS PELA VIDA,PELA MINHA FAMÍLIA,PELO TRABALHO.PELO PÃO DE CADA DIA,POR NOS PROTEGER 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”

https://picasion.com/
https://picasion.com/

quinta-feira, 7 de novembro de 2019

InovaCampinas Trade Show 2019 -30 e 31 de outubro.-SÃO PAULO-BRASIL



O InovaCampinas Trade Show 2019 encerrou nesta nesta quinta-feira (31) a sua 6ª edição e reuniu diferentes atores do ecossistema de inovação da região de Campinas, com a participação de empresas, investidores, startups e empreendedores nacionais e internacionais. Cerca de 3 mil visitantes passaram pelo local em dois dias de programação e mais de 300 reuniões de negócios foram realizadas, 50% a mais do que no ano passado. O evento ocorreu na Expo D.Pedro nos dias 30 e 31 de outubro.
 Com isso, o InovaCampinas Trade Show 2019 se consolidou um importante evento no epicentro da tecnologia e inovação do país. Dentre os participantes presentes, 73% foram empresas e startups; 12% entre pesquisadores, universidades e institutos de pesquisa; 8% de instituições e órgão públicos e 7% entre organizações da sociedade civil, como ONGs e associações.
 O evento contou também com uma ampla área de exposição com a presença de mais de 70 estandes de startups, instituições de pesquisa, prefeituras e universidades que apresentaram seus produtos e tecnologias para o público.
 Ao todos, mais de 20 atividades foram realizadas nos dois auditórios, entre palestras, mesas e paineis por onde passaram cerca de 60 palestrantes nacionais e internacionais. O evento trouxe para o debate, tanto nas conferências quanto na área de exposição, os temas mais relevantes do mercado, como empreendedorismo, agronegócio, IOT, saúde, indústria 4.0, energia, food tech e transformação digital.

quarta-feira, 6 de novembro de 2019

ANALYSIS, DESIGN, AND IMPLEMENTATION OF A 5KW ZERO VOLTAGE SWITCHING PHASE-SHIFTED FULL-BRIDGE DC/DC CONVERTER BASED POWER SUPPLY FOR ARC WELDING MACHINES -BY MUTLU USLU-MIDDLE EAST TECHNICAL UNIVERSITY


ANALYSIS, DESIGN, AND IMPLEMENTATION OF A 5 KW ZERO VOLTAGE SWITCHING PHASE-SHIFTED FULL-BRIDGE DC/DC CONVERTER BASED POWER SUPPLY FOR ARC WELDING MACHINES

 A THESIS SUBMITTED TO THE GRADUATE SCHOOL OF NATURAL AND APPLIED SCIENCES OF MIDDLE EAST TECHNICAL UNIVERSITY BY MUTLU USLU IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN ELECTRICAL AND ELECTRONICS ENGINEERING

 ABSTRACT
ANALYSIS, DESIGN, AND IMPLEMENTATION OF A 5 KW ZERO VOLTAGE SWITCHING PHASE-SHIFTED FULL-BRIDGE DC/DC CONVERTER BASED POWER SUPPLY FOR ARC WELDING MACHINES Uslu, Mutlu M.S., Department of Electrical and Electronics Engineering Supervisor: Asst. Prof. Dr. Ahmet M. Hava November 2006, 196 pages

Modern arc welding machines utilize controllable high frequency DC/DC power supply with high dynamic and steady state current regulation performance. In the design robustness, small size and low weight, low complexity, and high efficiency are the defining criteria. The most suitable approach for a 5 kW arc welding machine power supply application is the high frequency Full-Bridge Phase-Shifted Zero Voltage Switching (FB-PS-ZVS) DC/DC converter with an isolation transformer. This converter not only gives the advantage of zero voltage switching for a wide load current range, it also provides reduced Electromagnetic Interference (EMI) and reduced component stress compared to standard PWM converters. In this thesis a FB-PS-ZVS DC/DC converter with 5 kW power rating is designed for modern arc welding machine applications. IGBTs are utilized at 50 kHz switching frequency for high efficiency and control bandwidth. The output current of the DC/DC converter is controlled via a Digital Signal Processor (DSP) control platform. The performance of the designed DC/DC converter is evaluated via the computer simulations and the experimental study of the constructed prototype.
Keywords: Power supply, DC/DC, full-bridge DC/DC converter, zero voltage switching, phase-shifted PWM, arc welding.

 FULL TEXT LINK:
http://users.metu.edu.tr/hava//Mutlu_Uslu_tez.pdf

segunda-feira, 4 de novembro de 2019

Horizon, Season 54, Episode 3, How To Build a Time Machine


Horizon, Season 54, Episode 3, How To Build a Time Machine directed by Peter Leonard, fl. 1990; produced by Peter Leonard, fl. 1990, British Broadcasting Corporation, in Horizon, Season 54, Episode 3 (London, England: BBC Worldwide, 2018), 51 mins

DCDBRASIL Data Centre Dynamics-05-06 NOVEMBRO SÃO PAULO BRASIL

POR QUE DCD;BRASIL?
 Maior país da América Latina, o Brasil também lidera no quesito de adoção de tecnologias e está, atualmente, passando por sua segunda grande onda de investimentos em infraestrutura digital. A demanda segue excedendo a oferta, especialmente em mega cidades, como São Paulo, que pretendem transformar a sua economia com tecnologias inteligentes. Os players de hiperescala já estão presentes e empresas de colocation internacionais estão investindo - o mercado está se desenvolvendo rapidamente. DCD;Brasil é o mais importante evento anual sobre data center e infraestrutura cloud do país e o investimento em infraestrutura digital é o principal tópico.
 LINK
https://dcd.events/conferences/brasil2019

sábado, 26 de outubro de 2019

Control and management strategies of smart grid swith high penetration of renewable energy -Elvira Amicarelli-Laboratoire de Génie Electrique de Grenoble INP dans l'École Doctorale Electronique, Electrotechnique, Automatique & Traitement du Signal.





Control and management strategies of smart grid swith high penetration of renewable energy Elvira Amicarelli .

THÈSE Pour obtenir le grade de DOCTEUR DE LA COMMUNAUTE UNIVERSITE GRENOBLE ALPES Spécialité : Génie électrique  Présentée par Elvira Amicarelli 
Thèse dirigée par Quoc Tuan TRAN et codirigée par Seddik BACHA préparée au sein du Laboratoire de Systèmes Electriques Intelligentes du CEA-INES et du Laboratoire de Génie Electrique de Grenoble INP dans l'École Doctorale Electronique, Electrotechnique, Automatique & Traitement du Signal. Stratégie de gestion des réseaux électriques à fort taux de production renouvelable distribuée Thèse soutenue publiquement le 16 Octobre 2017, devant le jury composé de : M. Jean Paul GAUBERT Professeur, Université de Poitier, Président Mme Zita VALE Professeur, Institut Polytechnique de Porto, Rapporteur Mme Manuela SECHILARIU Professeur, Université de Technologie de Compiègne, Rapporteur M. Phuong NGUYEN Assistant Professeur, Université technique d’Eindhoven, Examinateur M. Quoc Tuan TRAN Professeur, INSTN, CEA-INES, Directeur de thèse M. Seddik BACHA Professeur, Université de Grenoble-Alpes, Co-Directeur de thèse M. Nicolas MARTIN Ingénieur de Recherche, CEA-INES.

GENERAL INTRODUCTION

I.1. Energy Scenarios: Opportunities and Challenges The use of various forms of energy contributed to exponential development of the human quality of life during the last two centuries. During this societal growth, fossil fuels have driven all energy-based technologies. Since, the coal-era advent, the world’s demand for electricity continued to escalate and has continued to do so till date. In fact, statistics affirm that during the next few decades the social and industrial development of China will induce a tremendous growth in China’s electricity demand; greater than the total current demand in the United States of America and Japan taken together [1]. Furthermore, the diffusion of new electricity-based technologies, such as electrical vehicles, will increase the electricity demand in industrialized regions, such as Europe and United States as well which will lead to an overall proliferation of electricity demand in the world. The increase in electricity consumption is an important factor which impels to think and plan judiciously the amount and the type of energy resources to use in the future. Moreover, increase in consumption combined with pressing topics like global warming, availability of resources and electricity costs are also driving politicians and scientists around the world to find solutions to these impending threats. In fact, the use of conventional energy resources is repeatedly questioned because of its numerous harmful implications on the society and environment. The reliable and economical accessibility of these resources have become a cause of concern for many countries around the world. In fact, fossil fuels are located only in restricted regions in the earth and are subjected to political agreements and relations. Their availability and price often reflect political tensions between important geographical regions, and pose a huge risk for both developed and developing countries alike. Moreover over the last decades, extraction of conventional fuels have become increasingly harder and often led to huge debate between governments, environmentalists, extraction companies and health experts. Discussions on reserve-water pollution and man induced earthquakes due to shale gas extraction is a current example. Furthermore, the analyses of the consequences of climatic change are generating huge public and political awareness and inciting in these actors the need to take actions in this aspect. Exclusion of environmental factors can no longer be afforded while taking political and economic decisions. Hence, many developed countries have decided to fix a climate goal in order to limit the earth from warming more than 2 °C. In 2016, the carbon dioxide emissions from the electricity sector in USA alone had amounted to about 1 million and 800 thousand metric tons, which accounts for about 35% of the total emissions in USA [3]. Furthermore, statistics suggest that a huge part of these emissions originate from coal based technologies [3]. In Europe, critical scenarios in conventional energy resources and the frightful projections in climate change are subjects of great public concern. Hence in 2007, the EU established the development of a low-carbon economy in order to challenge this fuel-based economy and limit greenhouse gas emissions. The EU energy directive takes action not only on the increase in Renewable Energy Sources (RES) in the production mix but also focuses on the increase in energy efficiency. Between 2004 and 2013, the EU countries efforts can be seen by considering their investments. Statistics estimates that they had invested around 600 billion $ in renewables and fuels growth especially by policy support [4].
LINK:https://tel.archives-ouvertes.fr/tel-01712034/document