High Power Density Power Electronic Converters for Large Wind Turbines by Osman Selcuk Senturk

Dissertation submitted to Faculty of Engineering, Science, and Medicine at Aalborg University in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Electrical Engineering Aalborg University Department of Energy Technology Aalborg, Denmark November 2011 Abstract In large wind turbines (in MW and multi-MW ranges), which are extensively utilized in wind power plants, full-scale medium voltage (MV) multi-level (ML) voltage source converters (VSCs) are being more preferably employed nowadays for interfacing these wind turbines with electricity grids. For these VSCs, high power density is required due to limited turbine nacelle space. Also, high reliability is required since maintenance cost of these remotely located wind turbines is quite high and these turbines operate under harsh operating conditions. In order to select a high power density and reliability VSC solution for wind turbines, first, the VSC topology and the switch technology to be employed should be specified such that the highest possible power density and reliability are to be attained. Then, this qualitative approach should be complemented with the power density and reliability assessments of these specific VSCs so that their power densities and reliabilities are quantitatively determined, which requires extensive utilization of the electro-thermal models of the VSCs under investigation.
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http://www.mediafire.com/view/9qw3c90brk5lo4m/osman_selcuk_senturk.pdf

ITA Rocket Design - Preparativos e voo no Brasil INSTITUTO TECNOLOGICO AEROESPACIAL

DEVELOPMENT OF INDUSTRIAL DIGITAL INVERTER AND ITS APPLICATIONS Ba Da Park Dept, of Interdisciplinary Program of Mechatronics Eng., College of Eng. Pukyong National University

In this thesis, the development results of digital inverter (DI) and its applications are introduced. A simple PI controller is proposed to make the output current track the constant setting current. Based on microprocessor (PIC16F73),  the  control  system is  designed  and  developed.  The  developed  digital  inverter is  applied to  welding machine and Brown gas generator.
THESIS PART1    http://www.mediafire.com/?uw4l7cwwmlbfw2q
THESIS PART2    http://www.mediafire.com/?qwu8anb8uqtbus4

Soldering Powerpole connectors the SOTAbeams way

Installing 75A Anderson Powerpole connectors for RC applications

Anderson PowerPole installation

Cat Uninterruptible Power Supply: UPSB220 Features Overview

Newave Energy 2012 ABB

ÔNIBUS ELÉTRICOS são recarregados, sem fios, enquanto andam pelas ruas

Imagine um veículo elétrico que pode viajar por distâncias infinitas sem jamas ter que parar em uma estação de recarga. Parece impossível, certo? Porque veículos elétricos usam baterias e, em algum ponto, você precisa parar para recarregá-las. Mas não esta aqui.

Dois novos ônibus elétricos que começaram a rodar nas ruas da cidade de Gumi, Coreia do Sul, tiram energia do asfalto. Os chamados Veículos Elétricos Online (OLEV, na sigla em inglês) recebem energia, sem o auxílio de fios, vinda de cabos elétricos colocados embaixo da superfície das ruas usando a tecnologia Shaped Magnetic Field in Resonance (SMFIR). Os ônibus levam uma bateria que tem um terço do tamanho das tradicionalmente usadas por carros elétricos e a recarrega coletando o equivalente a 100 kW de eletricidade desses campos magnéticos criados pelos cabos elétricos — eles trafegam a cerca de 17cm da superfície das ruas.

Pesquisadores têm grandes expectativas para a tecnologia, originalmente desenvolvida pelo Instituto de Ciência e Tecnologia Avançada da Coreia (KAIST).

TABELA CABOS ELETRICOS

Kites: energía renovable del futuro

Saúl Griffith

A High Performance DSP Voltage Controller with PWM Synchronization for Parallel Operation of UPS Systems

A High Performance DSP Voltage Controller with PWM Synchronization for Parallel
Operation of UPS Systems

Kyung-Hwan Kim
Hanyang University
Department of Electrical Engineering
17 Haengdang-dong, Seongdong-Gu, Seoul KOREA

Inverter system, which uses LC component as the output filter, is essential for a UPS (Uninterruptible Power supply), UPQC (Universal Custom Power Conditioner) and PCS (Power Conditioning System) for the photovoltaic power system. This paper presents DSP (Digital Signal Processor) controlled voltage controller for a 3-phase UPS inverter, which is able to compensate the voltage distortions due to unbalanced and nonlinear loads. The paper discussed the problem of conventional control schemes for the compensation of voltage distortion when they are applied to UPS inverter, and proposes advanced synchronous reference frame control scheme which is able to overcome the problem. In order to solve the problem of low damping ratio of LC filter, the inverter current feed-forward compensator including the selection of the feed-forward gain is proposed. And the digital filter for a compensation of the voltage distortion due to unbalanced and nonlinear loads is also proposed, which makes PI controllers in the synchronous reference frame are able to operate with DC values even under nonlinear and unbalanced load, likewise ensures PI controllers are able to provide zero steady state error. In order to improve the practical usability of the proposed scheme in the paper, the realization of the PLL and the parallel operation, which are essential for UPS, using the proposed controller is also presented. Especially, this paper shows that the feed-forward compensation of the inverter current and the PWM synchronization method proposed in the paper ensures a high precise load-sharing performance in parallel operation of inverter system.

A New Equivalent Circuit Model of IGBT Current Sensors Chun-Chieh Tseng* Chia-Hsiung Kao**

 

A New Equivalent Circuit Model of IGBT Current Sensors
Chun-Chieh Tseng* Chia-Hsiung Kao**
ABSTRACT
A new equivalent circuit model for IGBT is presented. It takes into account both
electron and hole conduction in sensors and is incorporated with SPICE3 for the
simulation of three types of current sensors, namely active, bipolar, and MOS sensors.
It adopts a multi-MOS model to include the doping variation in the MOS body. The
results agree well with the current sensing measurements within an average error of
4.4%.

LINK FULL PAPER HERE :

http://www.mediafire.com/?cqs937sb0bwb78q

ANALISIS DE SISTEMAS DE POTENCIA ING. ALVARO ACOSTA MONTOYA

TRANSFORMADORES DE POTENCIA DE MEDIDA Y DE PROTECCION ENRIQUE RAS

5. Z Transform MIT MIT 6.003 Signals and Systems, Fall 2011 V MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Course Description

6.003 covers the fundamentals of signal and system analysis, focusing on representations of discrete-time and continuous-time signals (singularity functions, complex exponentials and geometrics, Fourier representations, Laplace and Z transforms, sampling) and representations of linear, time-invariant systems (difference and differential equations, block diagrams, system functions, poles and zeros, convolution, impulse and step responses, frequency responses). Applications are drawn broadly from engineering and physics, including feedback and control, communications, and signal processing.

Instituto de Nanotecnologia ganha prêmio internacional EM ESPANHA

FONTE ORIGINAL DA INFORMAÇÃO
http://www.unesp.br/portal#!/noticia/11397/instituto-de-nanotecnologia-ganha-premio-internacional/

Divulgação/INCTMN

Longo (à esq.), diretor do INCTMN, recebe prêmio

Instituto de Nanotecnologia ganha prêmio internacional

Qualidade e contemporaneidade dos trabalhos é reconhecida

[05/07/2013]

No XXXIX Congresso Internacional de Químicos Teóricos de Expressão Latina (QUITEL-2013) realizado de 30 de junho a 5 de julho, o Instituto Nacional de Ciência e Tecnologia dos Materiais em Nanotecnologia (Fapesp/CNPq), com sede no Instituto de Química da Unesp, Câmpus de Araraquara, foi premiado pelo trabalho intitulado "Structural and electronic structure of luminescent BaCeHfZrO3", desenvolvido pelos pesquisadores Mário Moreira, Juan Andres, Mateus Ferrer, José A. Varela e Elson Longo, do Instituto de Química da Unesp, Câmpus de Araraquara.
O evento ocorreu em Granada/Espanha e reuniu 180 pesquisadores de Espanha, Portugal, França, Itália, Alemanha, Rússia, Holanda, Bulgária, Marrocos, Brasil, Argentina, México. Equador, Chile, Uruguai, Venezuela, Estados Unidades, Argélia, Suécia, Dinamarca, Inglaterra, Tunísia, Sérvia, República Tcheca, África do Sul,  Suiça e Áustria. “Este prêmio reflete a qualidade e contemporaneidade dos trabalhos desenvolvidos no INCTMN”, disse Elson Longo, diretor geral do INCTMN.

International Courses at UNESP Universidade Estadual Paulista – UNESP SAO PAULO BRAZIL

 FUENTE

http://www.unesp.br/portal#!/arex/novo8425/courses-in-english/ 

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International Courses at UNESP

(Download PDF)

Universidade Estadual Paulista – UNESP is a public university with 24 campuses spread throughout the State of São Paulo, a major economic power in Brazil.
UNESP is a research intensive university, ranked among the best in the country and has received international recognition for the quality of its research and academic activities.
In order to promote cultural diversity in the classroom and participation of international students in our programs, a new project called International Courses at UNESP will be launched in 2013 in four different areas: Agricultural Sciences, Alternative Energy, Dentistry, and Literature and Linguistics.

Agricultural Sciences	Alternative Energy
Dentistry	Literature and Linguistics

PROFESSOR LUIZ DE QUEIROZ ORSINI,UMA DAS MAIORES LENDAS NO MEIO DA ENGENHARIA ELÉTRICA NO BRASIL USP SÃO PAULO

O Condutor entrevista uma das maiores lendas no meio da Engenharia Elétrica!
Veja com exclusividade o que uma das mentes mais influentes
no ramo da engenharia do Brasil do século XX tem a dizer sobre
sua vida e sua carreira.

FUENTE ORIGINAL DE LA INFORMMACION
http://www.cee.poli.usp.br/condutor/Cond118.pdf

Energias Renovables

Energias Renovables PRODUCCIÓN DE BIO-COMBUSTIBLES
Conferencista e Investigador Internacional
PhD Mark Holtzapple
PROFESOR DE TEXAS A&M UNIVERSITY, USA

Análisis de Redes Eléctricas 1-Circuitos Trifásicos Sesión 8 6/13

Lec-19 Basic Principles of Feedback Control

Control Systems Engineering - Lecture 9 - The s-plane

Power Electronics: Module 22- Full-Bridge Converter

Power Electronics: A First Course
Author: Mohan
ISBN: 1118074807 9781118074800
Publisher: Wiley
Reference:
Power Electronics: Converters, Applications, and Design, 3rd Edition
Authors: Mohan, Undeland and Robbins

FLUORESCENT Lamp recycling plants from MRT

Debate de postulantes a Decanato FIEE 2013 (2/4)

DEBO DAR MI OPINION QUE TODO CANDIDATO AL DECANATO TIENE QUE TENER UN EQUIPO DE TRABAJO,UN PLAN DE TRABAJO,UNA ESTRATEGIA A CORTO MEDIANO Y LARGO PLAZO,TIENE QUE TENER PERSONAL CALIFICADO Y EXPERIENCIA EN EL AREA ADMINISTRATIVA,ACADEMICA,FINANCIERA ,CULTURAL,RELACIONES INTERNACIONES,EXTENSION SOCIAL,RELACIONES CON LAS EMPRESAS PRIVADAS,RELACION CON LOS EGRESADOS,AREA DE INTERNET Y VIDEOCONFERENCIAS CON OTROS PAISES.
NATURALMENTE EL SUCESO SOLAMENTE VA APARECER CUANDO TRABAJEN EN SINCRONIA ALUMNOS,PROFESORES,TRABAJADORES,Y LA AUTORIDAD PRINCIPAL EL DECANO.