Power Electronics,Eletrônica de Potencia,СИЛОВОЙ ЭЛЕКТРОНИКИ,전력전자,Engenharia Eletrônica,Paradigmas da Ciencias,Inovaçoes Tecnologicas
“TEMOS O DESTINO QUE MERECEMOS.
O NOSSO DESTINO ESTA DE
ACORDO COM OS NOSSOS MERITOS”
ALBERT EINSTEIN.
Imagination is more important than knowledge, for knowledge is limited while imagination embraces the entire world.
EL FUTURO SE CONSTRUYE HOY,EL SUCESSO NO ES FRUTO DE LA CASUALIDAD,SE HUMILDE ,APRENDE SIEMPRE CADA DIA.
Abstract: This paper presents a single-stage alternating current (AC)/direct current (DC) light-emitting
diode (LED) tube lamp driver for energy-saving indoor lighting applications; this driver features
power-factor corrections and soft switching, and also integrates a dual buck-boost converter with
coupled inductors and a half-bridge series resonant converter cascaded with a bridge rectifier into
a single-stage power-conversion topology. The features of the presented driver are high efficiency
(>91%), satisfying power factor (PF > 0.96), low input-current total-harmonic distortion (THD < 10%),
low output voltage ripple factor (switching (ZVS) obtained on both power switches. Operational principles are described in detail,
and experimental results obtained from an 18W-rated LED tube lamp for T8/T10 fluorescent lamp
replacements with input utility-line voltages ranging from 100 V to 120 V have demonstrated the
functionality of the presented driver suitable for indoor lighting applications. LINK ORIGINAL View Full-Text http://www.mdpi.com/2076-3417/7/2/115/pdf
LED lighting control driver design and development of the 12V‐12W class using the voltage controlled ring oscillator Ki-Soo Kwon Department of Electronic Engineering Graduate School Yeungnam University
Abstract
This paper presents a Pulse Width Modulation (PWM) controller and
circuits for the high power LED (Light Emitting Diode) driver. The controller
is available for the remote control through four major operation modes of
ON, OFF, Emergency and Power saving using the serial communication.
The entire driver circuits use a DC‐DC converter such a Boost topology
with dimming, current, thermal control and communication functions for
hallway lighting and automobile applications. According to the type and
power of LED, a driver IC has already been developed and is produced.
This driver IC makes the constant current and constant voltage available.
However, if the LED driver allows delicate dimming control and thermal
dissipation through allowance of LED off time, PWM control is needed.
Therefore, a MCU (Microcontroller unit) for the PWM control as well as a
driver IC for driving LEDs is needed. If this operation is embedded at this
driver IC, the expense can be reduced. The LED controller integrated
circuit (IC) was designed, simulated and fabricated in 0.35μm
Magnachip/Hynix.
An Electrical Method for Junction Temperature Measurement of Power Semiconductor
Switches
Baker, Nick
Aalborg Universy-DENMARK Dissertation submitted: April 6th 2016
PhD supervisor: Prof. Stig Munk-Nielsen
Aalborg University, Denmark
PhD
committee: Professor Josep Guerrero (chairman)
Aalborg University
Dr. Gernot J. Riedel
ABB Cooperate Research
Professor Philip Andrew Mawby
University of Warwick
PhD Series: Faculty of Engineering and Science, Aalborg University
Abstract
Power semiconductor switches are critical components in power electronic converters and
operate in thermally stressful environments. The junction temperature of a power semiconductor
directly influences its power loss and is intrinsically linked to numerous failure mechanisms.
Knowledge of this temperature is therefore important for optimal operation and for reliability
reasons. If the junction temperature is known during the operation of a converter, real-time
condition monitoring and active thermal control systems could be developed to improve system
reliability.
Performing direct measurements of junction temperature is difficult since the power
semiconductor is generally encapsulated inside an array of packaging materials. Alternatively,
the electrical behaviour of a semiconductor largely depends on temperature. If this relationship
is known, the electrical parameters of the device can be monitored and used to estimate the
junction temperature. These are known as Temperature Sensitive Electrical Parameters (TSEPs)
and are one way to carry out non-invasive, real-time junction temperature measurements on
fully packaged devices.
Nevertheless, successful implementation of these techniques during the normal operation of a
power semiconductor is thus far limited. Often holding back their use is the need to compensate
for inherent fluctuations caused by a constantly changing electrical environment (or alternatively
requiring interruption to normal operation to force fixed electrical conditions), and significant
uncertainty over accuracy. As a result, this PhD aims to develop new methods, or improvements
to existing methods, for junction temperature measurement via TSEPs during the operation of
power semiconductor switches.
In Chapter 1, the state-of-the-art in the topic of junction temperature measurement is introduced.
A literature review of TSEPs investigated for use in operating power semiconductor switches is
then provided. From this, several implementation issues are identified and used to formulate
technical objectives for the PhD thesis.
Chapter 2 introduces the first original contribution of the thesis. Two TSEP-based methods for
junction temperature measurement, unpublished in scientific literature before the
commencement of the PhD, are presented. The measurement principles are explained, and
experimental validation is provided on Insulated-Gate-Bipolar-Transistors (IGBTs). The
foremost advantages in the presented TSEPs are that they are measured without interruption to
normal IGBT operation, and do not require compensation for varying load current conditions.
The primary method presented is referred to as the Peak Gate Current (IGPeak) method, which is
selected for further examination in Chapter 3.
In Chapter 3, the second scientific contribution of the thesis is provided. Here, the accuracy of
the IGPeak method on IGBTs is extensively examined using direct measurements of junction
temperature from an Infra-Red camera. The validation is performed on IGBT dies with differing
geometry, as well as IGBTs in both healthy and degraded conditions. Finally, IGBTs in a
paralleled configuration are investigated. These results in terms of accuracy are compared with a
traditional TSEP method commonly found in prior art.
LINK ORIGINAL http://vbn.aau.dk/files/240989038/PHD_Nick_Baker_E_pdf.pdf
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A Study on the Design and Evaluation of High Power Induction Lamp System Young-il Chung Dept. Information and Communication Engineering Graduate school Wonkwang University
Abstract
Currently, road lightings are installed with less than 400W of existing
metal halide lamps. These road lightings are being replaced by
energy-saving lightings.
Induction lamps are expected to be more actively replaced with
targets for tunnel lighting and high ceiling lighting.
Therefore, it is necessary to develop high efficiency, high power
induction lamps system.
In this study, the discharge tube design, lmap gas, lighting circuit, and
lighting fixture were designed for the high power of the induction
lamps. And Induction lamp system was optimized through electrical,
optical, thermal characteristics analysis and simulation.
For the development of the high power induction lamp, the induction
lamp was fabricated according to the design factors such as gas type,
gas pressure, discharge tube, ferrite core size, amalgam, and driving
frequency after the improvement of the existing process.
In addition, the design and manufacture of the lighting circuit for the
high power induction lamp were carried out.
The light distribution characteristics through the optical design of the
lighting fixture were compared and analyzed, and the illuminance
distribution characteristics were simulated to develop the optimized
high power induction lamp system.
The discharge tube size of the high power induction lamp was 62mm,
and the gas was optimized to Kr 100% and gas pressure 300 ~
350[mmHg].
When the indium amalgam was applied, the induction lamp maintained
the same power. As a result, optimization of the induction lamp,
lighting circuit, and lighting fixture was completed in accordance with
the rating.
The characteristic analysis through the design of the lighting circuit
for the induction lamp proceeded to improve and supplement.
Based on the optical characteristics of the induction lamp and the
system effect according to the driving frequency of the lighting circuit,
the driving frequency was optimized to 135kHz.
An optical simulation was performed according to the distance
between the lamp and the reflector by using the OptisWorks program.
and illuminance simulation was performed for each height according to
the light distribution by using the Relux program.
As a result, the high power induction lamp high ceiling fixture was
completed.
In conclusion, Based on the high power induction lamp, ligthing circuit,
lighting fixture optimization study was to present a guide for design
and evaluation of induction lamp system.
It is expected to be applied to additional induction lamp research and
development in future.
Analysis and Multi-Objective
Optimization of Multi-Cell DC/DC
and AC/DC Converter Systems
A thesis submitted to attain the degree of
DOCTOR OF SCIENCES of ETH ZURICH
presented by
MATTHIAS JOACHIM KASPER-2016 ETH Zurich Power Electronic Systems Laboratory Physikstrasse 3 j ETL I14 8092 Zurich j Switzerland http://www.pes.ee.ethz.ch
Abstract
One of the key enabling technologies behind many global megatrends,
which are a ecting our lives as individuals and as a society in many different
areas, is power electronics. Prominent examples are the shift from
conventional energy sources to renewable energy sources, the reduction
of greenhouse gas emissions due to the electri cation of mobility, and
the trend towards cloud-computing in the information technology area,
which are all based on the development of cost-e ective, e cient and
compact power electronic systems. In order to ful ll future requirements
for power electronic systems, it is therefore of great importance
to identify new ways to develop systems with higher e ciency, power
density, and reliability.
The analysis of relevant literature reveals, that improvements of
power electronic systems are to a great extent either based on the improvements
of speci c components or on the modi cation of known
control algorithms and/or topologies. These improvement processes,
however, are of evolutionary nature and are not going to provide significant
steps of performance improvements compared to today's solutions
for the foreseeable future.
Eletromagnetismo para Sistemas e Automação
O conteúdo disponível nesta página refere-se à disciplina de Eletromagnetismo para Sistemas e Automação do curso de Engenharia de Controle e Automação da Universidade Federal de Santa Maria (UFSM). As principais competências e habilidades desenvolvidas ao longo da disciplina são enumeradas a seguir:
Possuir uma sólida base matemática para solucionar problemas de Eletromagnetismo
Compreender os conceitos fundamentais do Eletromagnetismo e as suas aplicações, no que se refere à:
Eletrostática
Magnetostática
Campos variáveis no tempo
Ondas eletromagnéticas
Linhas de transmissão
Equações de Maxwell
Softwares
Nesta disciplina são empregados os seguintes softwares:
FEMM (Simulação em elementos finitos - open source)
Ansys Maxwell (Simulação em elementos finitos - proprietário) Eletromagnetismo - Aula 21 - Equações de Maxwell para Campos Variáveis no Tempo
Universidade Federal de Santa Maria - UFSM
Disciplina de Eletromagnetismo para Sistemas e Automação
Prof. Rafael C. Beltrame - http://www.ufsm.br/beltrame
Nesta aula:
- Introdução
- Lei de Faraday-Lenz
- FEM de movimento de FEM de transformador
PAGINA WEB DEL CURSO COMPLETO EN VIDEOS Eletromagnetismo para Sistemas e Automação http://coral.ufsm.br/beltrame/index.php/disciplinas/graduacao/eletromagnetismo
BIOGRAFIA DOUTOR RAFAEL BELTRAME
Rafael Concatto Beltrame recebeu o grau de Engenheiro Eletricista, Mestre e Doutor em Engenharia Elétrica pela Universidade Federal de Santa Maria (UFSM), em 2008, 2009 e 2012, respectivamente. Também em 2012, graduou-se no Programa Especial de Formação de Professores para a Educação Profissional - Licenciatura Plena. Desde 2005 atua como pesquisador no Grupo de Eletrônica de Potência e Controle (GEPOC). Atualmente é Professor Adjunto no Departamento de Processamento de Energia Elétrica (DPEE) da Universidade Federal de Santa Maria. Tem experiência na área de Engenharia Elétrica, com ênfase em Eletrônica de Potência. Dentre as áreas de interesse estão acionamentos elétricos, síntese e análise de conversores estáticos, técnicas de auxílio à comutação e fontes CA de potência. É membro da Sociedade Brasileira de Eletrônica de Potência (SOBRAEP) e das sociedades IEEE Power Electronics, IEEE Industrial Electronics e IEEE Industry Applications.
2009 - 2012
Doutorado em Engenharia Elétrica.
Programa de Pós-Graduação em Engenharia Elétrica, PPGEE (Conceito CAPES 5).
Universidade Federal de Santa Maria, UFSM, Brasil.
Título: Fontes CA de potência: contribuição ao estudo e ao desenvolvimento de topologias híbridas.
Orientador: Prof. Hélio Leães Hey, Dr. Eng.
Co-orientador: Prof. Cassino Rech, Dr. Eng.
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