“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

terça-feira, 20 de fevereiro de 2018

Design and Testing of Voltage Source Inverter and Motor Control System for Electric Vehicle Lars Helge Opsahl Norwegian University of Science and Technology Department of Electric Power Engineering





Design and Testing of Voltage Source Inverter and Motor Control System for Electric Vehicle 
Lars Helge Opsahl 
 Norwegian University of Science and Technology 
Department of Electric Power Engineering 

 Abstract
With fast rotating permanent-magnet motors and compact battery storage units, the high performance motorsport community has, in recent years, started to utilize the quick response and high torque of electrical drivetrain solutions. By recovering energy, braking into a corner, for then to utilize the same energy, boosting out again, the electrical machine gives increased performance even for the fastest racing cars. The purpose of the work presented in this Master’s thesis is to develop and produce the power electronics and motor control system needed to control such an electric machine, where the final product is used to drive a fully electric prototype racing car. The thesis presents the conceptual work, design choices, prototyping, testing and development of a 2-level voltage source inverter and motor control system. The voltage source is a battery accumulator energy storage unit, while the machine is a three-phase permanent-magnet motor. The voltage source inverter is based on insulated-gate bipolar transistors (IGBTs), controlled by a motor control system called field oriented control. On command from the driver’s throttle, the motor control system generates the required stator currents, giving the wanted output torque, supplied from the voltage source of the battery accumulator. The inverter is the connecting interface between the power source, and the rotating machinery. With the amount of energy and power needed to drive a racing car, safe and reliable operation is important. To ensure the safety of the driver and operating personnel, the system and its safety features have been through extensive testing in a laboratory setup and on the race tracks. In the system development process, simulation and modelling tools have been applied to investigate different solutions and technologies. These tools have also been used to design the electric circuits, program code and mechanical design needed for the system. The final product is installed in a racing car and shows great performance.

LINK
https://brage.bibsys.no/xmlui/bitstream/handle/11250/2368215/13287_FULLTEXT.pdf?

domingo, 18 de fevereiro de 2018

Research on the Mechanism of Neutral-point Voltage Fluctuation and Capacitor Voltage Balancing Control Strategy of Three-phase Three-level T-type Inverter Gangui Yan*, Shuangming Duan† , Shujian Zhao*, Gen Li**, Wei Wu* and Hongbo Li*



Research on the Mechanism of Neutral-point Voltage Fluctuation and Capacitor Voltage Balancing Control Strategy of Three-phase Three-level T-type Inverter Gangui Yan*, Shuangming Duan†, Shujian Zhao*, Gen Li**, Wei Wu* and Hongbo Li*

Corresponding Author: School of Electrical Engineering, Northeast Electric Power University, China. (33339371@163.com) * School of Electrical Engineering, Northeast Electric Power University, China. (yangg@neepu.edu.cn, zsj_neepu@foxmail.com, veil0814@126.com, dqlihongbo123@163.com)

 Abstract – In order to solve the neutral-point voltage fluctuation problem of three-phase threelevel T-type inverters (TPTLTIs), the unbalance characteristics of capacitor voltages under different switching states and the mechanism of neutral-point voltage fluctuation are revealed. Based on the mathematical model of a TPTLTI, a feed-forward voltage balancing control strategy of DC-link capacitor voltages error is proposed. The strategy generates a DC bias voltage using a capacitor voltage loop with a proportional integral (PI) controller. The proposed strategy can suppress the neutral-point voltage fluctuation effectively and improve the quality of output currents. The correctness of the theoretical analysis is verified through simulations. An experimental prototype of a TPTLTI based on Digital Signal Processor (DSP) is built. The feasibility and effectiveness of the proposed strategy is verified through experiment. The results from simulations and experiment match very well.
LINK
http://www.mediafire.com/file/cdwxgmn2dburlbu/E1EEFQ_2017_v12n6_2227.pdf

quarta-feira, 14 de fevereiro de 2018

CONTROL DE FILTROS ACTIVOS DE POTENCIA PARA LA MITIGACIÓN DE ARMÓNICOS Y MEJORA DEL FACTOR DE POTENCIA DE SISTEMAS DESEQUILIBRADOS




LINK
http://www.mediafire.com/file/cwd6ga48vx0pg0l/Tesis_JF_PetitSuarez.pdf

Analise De Circuitos Robert L. Boylestad 12ª Ed Em Portugues



LINK ORIGINAL DE ACCESO LIBRE EN LA WEB:
https://archive.org/details/AnaliseDeCircuitosRobertL.Boylestad12EdEmPortugues

LINK DIRETO EN FORMATO PDF:
https://archive.org/download/AnaliseDeCircuitosRobertL.Boylestad12EdEmPortugues/Analise%20de%20Circuitos%20Robert%20L.%20Boylestad%2012%C2%AA%20Ed%20em%20Portugues.pdf


About the Internet Archive 
The Internet Archive, a 501(c)(3) non-profit, is building a digital library of Internet sites and other cultural artifacts in digital form. Like a paper library, we provide free access to researchers, historians, scholars, the print disabled, and the general public. Our mission is to provide Universal Access to All Knowledge. We began in 1996 by archiving the Internet itself, a medium that was just beginning to grow in use. Like newspapers, the content published on the web was ephemeral - but unlike newspapers, no one was saving it. Today we have 20+ years of web history accessible through the Wayback Machine and we work with 450+ library and other partners through our Archive-It program to identify important web pages.

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LINK: https://archive.org/about/

segunda-feira, 12 de fevereiro de 2018

Uma Contribuição à Automação de Ensaios em Transformadores de Distribuição-José Manuel Esteves Vicente.- 2006. Tese (Doutorado em Engenharia Elétrica) - Universidade Federal de Itajubá-BRASIL



UNIFEI Doutorado em Engenharia Elétrica 
José Manuel Esteves Vicente 
 Possui graduação em Engenharia Elétrica pela Universidade Federal de Itajubá(1987) e mestrado em Engenharia Elétrica pela Universidade Federal de Itajubá(1991). Atualmente é Professor da Universidade Federal de Itajubá. Tem experiência na área de Engenharia Elétrica, com ênfase em Eletrônica Industrial. Atuando principalmente nos seguintes temas:Instrumentação - Medidas Elétricas - Harmônicos, Relação de transformação, Transformadores.
LINK
http://www.mediafire.com/file/0cnoq4l21259sja/ENSAIOTRAFO.pdf

UPS ONLINE 10KVA- GRUPO DE PROCESSAMENTO DE ENERGIA E CONTROLE(GEPEC) UNIVERSIDADE FEDERAL CEARA-BRASIL









UPS SINGLE PHASE ONLINE 10KVA DESENVOLVIDO NO GEPEC GPEC- GRUPO DE PROCESSAMENTO DE ENERGIA E CONTROLE DA UNIVERSIDADE FEDERAL DE CEARÁ EM PARCERIA COM A MICROSOL.,TENHO ORGULHO E SATISFAÇÃO DE TER TRABALHADO EM VÁRIOS TRABALHOS COMO ENG.DE PESQUISA DA MICROSOL.

O Grupo de Processamento de Energia e Controle (GPEC), criado em 1995, é ligado ao Departamento de Engenharia Elétrica (DEE) da UFC e tem como objetivo a pesquisa e o desenvolvimento tecnológico em eletrônica de potência. O GPEC atua na proposição de soluções tecnológicas para os setores industriais e de serviço, portanto trabalha em parceria com a indústria nacional, empresas de energia elétrica e institutos de pesquisa no Brasil e no exterior. Os professores e pesquisadores do grupo têm tido atuação destacada no curso de graduação e no programa de pós-graduação em Engenharia Elétrica da UFC, contribuindo na formação e qualificação de profissionais para atuação em áreas como: Sistemas Elétricos de Potência, Eletrônica de Potência, Acionamento Industrial, Qualidade de Energia Elétrica e Aproveitamento de Fontes Renováveis de Energia.
WEBSITE DO GPEC  : http://www.gpec.ufc.br/

UPS SINGLE PHASE 10KVA GRUPO DE PROCESSAMENTO DE ENERGIA E CONTROLE GEPEC FORTALEZA CEARA,UM DOS MAIORES GRUPOS DE PESQUISA DE ELETRÔNICA DE POTENCIA DO BRASIL,PESSOALMENTE ME SINTO MUITO FELIZ DE TER SER PARTE DA HISTORIA VIVA DO DESENVOLVIMENTO DA ELETRÔNICA DE POTENCIA NO BRASIL,MESMO QUE HOJE POR QUESTÕES ECONÔMICAS E POLITICAS QUASE TODOS OS EQUIPAMENTOS SÃO IMPORTADOS E NOSSO DEVER TER SEMPRE NOSSA TECNOLOGIA PRÓPRIA,O PROBLEMA FUNDAMENTAL NÃO E O PROJETO,O PROBLEMA FUNDAMENTAL E A PRODUÇÃO EM ESCALA UNIVERSAL PARA TER PREÇO E SER COMPETITIVOS NO MERCADO,NESTE REQUISITO CHINA ATUALMENTE DOMINA A PRODUÇÃO EM ALTÍSSIMA ESCALA O QUAL E UM GRANDE DESAFIO PARA TODOS.

POWER ELECTRONICS PROF. YONGSUG SUH -PART10-AC-DC CONVERTER 전력전자 및 실험 전북대학교 서용석 - CHONBUCK NATIONAL UNIVERSITY - KOREA OPEN COURSEWARE PART10-





Principles of static power conversion , switching cell structure , DC-DC converter , AC-DC converter , DC-AC converter
POWER ELECTRONICS PROF. YONGSUG SUH - CHONBUCK NATIONAL 
UNIVERSITY - KOREA OPEN COURSEWARE 
PART10- AC-DC converter introduction to Switch-mode Inverter

domingo, 11 de fevereiro de 2018

Power electronics aspects for AC grid connected systems - a revision .-Wilson Komatsu- Escola Politécnica-UNIVERSIDADE DE SÃO PAULO BRASIL


Tese de Livre Docencia DocumentoTese de Livre Docencia
AutorKomatsu, Wilson (Catálogo USP)
Nome completoWilson Komatsu
E-mail E-mailUnidade da USP Escola Politécnica
Área do Conhecimento Eletrônica de Potência
Data de Defesa 2011-09-27
ImprentaSão Paulo, 2011
Banca examinadora Galvão, Luiz Cláudio Ribeiro (Presidente) Kaiser, Walter Kassick, Ênio Valmor Pomilio, José Antenor Suemitsu, Walter Issamu
Título em português
Aspectos de eletrônica de potência em sistemas ligados à rede de corrente alternada - uma revisão.Palavras-chave em português Eletrônica de potência

Resumo em português Vários equipamentos de eletrônica de potência são conectados à rede de corrente alternada (CA), para os mais diversos fins, como conversão de energia, filtragem de corrente e tensão, correção de reativos da rede CA etc. Este trabalho apresenta uma revisão não abrangente, refletindo a experiência do autor, sobre tais equipamentos. São discutidos aspectos de aplicações, modelamento de equipamentos e componentes, controle de conversores, implementação e testes. A abordagem é realizada com o uso de publicações do autor com seus associados, de modo que não se apresenta aqui proposta inédita, mas sim uma integração de conhecimento adquirido.

Título em inglês
Power electronics aspects for AC grid connected systems - a revision
.Palavras-chave em inglês Power electronics
 Resumo em inglês Many power electronics equipment are connected to the alternating current (AC) grid in order to provide different functions, as energy conversion, current and voltage filtering, AC reactive power compensation etc. This work shows an abridged revision, reflecting author's experience, on such equipment. Application aspects, equipment and components modeling, converter control, implementation and tests are discussed. The approach is done using published works from the author with his associates, therefore no unpublished proposal is presented, but instead the acquired knowledge is exposed.

LINK ORIGINAL: http://www.teses.usp.br/teses/disponiveis/livredocencia/3/tde-21052012-181653/es.php
DOWNLOAD: http://www.teses.usp.br/teses/disponiveis/livredocencia/3/tde-21052012-181653/publico//TeseLivreDocenciaWilsonKomatsu.pdf


Wilson Komatsu currently works at the Departamento de Engenharia de Energia e Automação Elétricas (PEA) (POLI), University of São Paulo. Wilson does research in Electronic Engineering and Electrical Engineering. Their most recent publication is 'Digital Control for PLLs Based on Moving Average Filter: Analysis and Design in Discrete Domain.

sábado, 3 de fevereiro de 2018

A Novel Analog Circuit Design for Maximum Power Point Tracking of Photovoltaic Panels - Nesrine Mhiri,Abdulrahman Alahdal,Hamza Ghulman, and Anis Ammous


A Novel Analog Circuit Design for Maximum Power Point Tracking of Photovoltaic Panels Nesrine Mhiri,1 Abdulrahman Alahdal,2 Hamza Ghulman,2 and Anis Ammous1,2 

1Power Electronics Group (PEG), National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia 2DEE, Umm Al Qura University, Makkah, Saudi Arabia
 Advances in Power Electronics Volume 2017 (2017), Article ID 9409801, 9 pages
 https://doi.org/10.1155/2017/9409801

 1. Introduction
 Currently, the production of domestic and industrial energy is based, in large part, on a limited resource: oil. Oil sources are becomingmore andmore rare, while the energy demands of the world rise continually. Since this formof energy covers a large part of the current energy production, it is necessary to find another solution to take over.The imposed constraint is to use an energy source that is economical and less polluting because the protection of the environment has become an important point [1–3]. The search for alternative energy resources has therefore become a crucial issue these days. Many scientific researches have been carried out, not only in the field of nuclear energy production, but also in the sector of unlimited energy sources, such as wind power generation and energy transformation. In the latter case, the design, optimization, and realization of photovoltaic systems are topical issues since they lead to a better exploitation of solar energy [2]. These photovoltaic powers generating systems can be operated in different places: electrification of isolated sites, installation in buildings or direct connection to network of electricity, and so on. A major problem with PV systems is to realize transfer of maximum power from PV generator to load. For several years, manyMPPT controlmethods have been developed and implemented, like Fuzzy Logic Method [4–7], perturbation and observation (P&O) method [5, 6, 8], and Incremental Conductance (Inc.Con.) method [7, 9–11].These techniques are generally complex and expensive to implement [4, 9, 12]. They differ in several aspects like complexity, range of effectiveness, cost, convergence speed, implementation hardware, required sensors, and popularity, plus other respects. However, these techniques are digital implementation. Alternatively, the MPPT can be implemented by analog circuits [13–15]. The potential benefit from analog solution is that theMPPT can be integrated withDC-DCcontroller such that “plug and play” can be expected for many low power PV applications. In fact, integration of certain functions into a normal PWM controller chip is the most desirable way for special applications to reduce the implementation complexity and system cost. In this paper, a new analog MPPT technique suitable for PV system applications is presented and validated by simulations.

LINK ORIGINAL:https://www.hindawi.com/journals/ape/2017/9409801/
DOWNLOADhttp://downloads.hindawi.com/journals/ape/2017/9409801.pdf

quarta-feira, 31 de janeiro de 2018

Inductor Design Method of DCM Interleaved PFC Circuit for 6.6-kW On-board Charger Bong-Gi You*, Byoung-Kuk Lee* and Dong-Hee Kim - Department of Electrical and Computer Engineering, Sungkyunkwan University, Korea



Inductor Design Method of DCM Interleaved PFC Circuit for 6.6-kW On-board Charger Bong-Gi You*, Byoung-Kuk Lee* and Dong-Hee Kim


Corresponding Author: Department of Electrical Engineering, Chonnam National University, Korea. (kimdonghee@jnu.ac.kr) * Department of Electrical and Computer Engineering, Sungkyunkwan University, Korea. (bongary91@gmail.com, bkleeskku@skku.edu) Received: April 6, 2017; Accepted: July 17, 2017

 Abstract – Because the on-board charger (OBC) is installed in electric vehicles (EVs), high power density is regarded as a key technology. Among components of the OBC, inductors occupy more than 30% of the total volume. Thus, it is important to reduce the volume and the weight of inductors while maintaining thermal stability. Discontinuous conduction mode (DCM) can satisfy these requirements; however, only a few studies have adopted the DCM operation for OBCs because of the large inductor current ripple. In this paper, a design process is proposed for application of the DCM operation to OBCs. In order to analyze the inductor losses accurately, a numerical formula for the inductor current ripple is deduced based on a detailed analysis. Two inductors are fabricated using several ferrite cores and powder cores taking into consideration the inductor size, inductor losses, and temperature rise. In order to verify the analysis and design process, experimental results are presented that show that the designed inductors satisfy the requirements of the OBCs

LINK VIEW FULL TEXT
http://www.jeet.or.kr/LTKPSWeb/pub/pubfpfile.aspx?ppseq=1896