Primeiro webinário da SOBRAEP– Associação Brasileira de Eletrônica de Potência-Conversores de Energia a Capacitor Chaveado-Prof. Ivo Barbi-03/08/2018 (sexta-feira) - 14 horas

Primeiro webinário da SOBRAEP– Associação Brasileira de Eletrônica de Potência-Conversores de Energia a Capacitor Chaveado-Prof. Ivo Barbi-03/08/2018 (sexta-feira) - 14 horas

Primeiro webinário da SOBRAEP– Associação Brasileira de Eletrônica de Potência
O primeiro webinário da SOBRAEP terá o tema Conversores de Energia a Capacitor Chaveado e será apresentado pelo Prof. Ivo Barbi no dia 03/08/2018 (sexta-feira) – 14 horas. O Prof. Ivo Barbi tem como uma das grandes conquistas a fundação da SOBRAEP no início da década 1990. O webinário será transmitido a partir do canal da SOBRAEP no Youtube (SOBRAEP ORG) e o acesso a transmissão pode ser feito de duas formas:

1) A partir do site da SOBRAEP (https://www.sobraep.org.br/), em PRÓXIMOS WEBINARS no botão REGISTRE-SE AQUI;
2) A partir do link direto para a transmissão https://www.youtube.com/watch?v=1Jtw4QM-Mvw.

Conversores de Energia a Capacitor Chaveado-Prof. Ivo Barbi-QUANDO-03/08/2018 (sexta-feira) - 14 horas

Ivo Barbi: o pesquisador da eletrônica de potência


“Há 31 anos, quando voltei do meu doutorado na França, o Brasil desconhecia a eletrônica de potência moderna”, lembra o professor Ivo Barbi, escolhido pelo Centro Tecnológico da UFSC para receber o Prêmio Destaque Pesquisador UFSC 50 Anos. Com graduação em Engenharia Elétrica e mestrado na mesma área pela UFSC, doutorado pelo L’institut National Polytechnique de Toulouse, ele contribui para que Santa Catarina e o Brasil sejam referências na área de eletrônica de potência.

Professor titular da UFSC, Ivo Barbi é o fundador do Laboratório de Máquinas Elétricas e Eletrônica de Potência (Lamep), que em 1994 se transformou no Instituto de Eletrônica de Potência (INEP). A mudança no nome marcou também a ampliação do espaço dedicado às pesquisas, conquista de Ivo Barbi e de outros professores do Departamento de Engenharia Elétrica. O laboratório original se desdobrou em oito que contribuem para o desenvolvimento tecnológico da energia elétrica a partir da eletrônica de potência, em atividades de ensino, pesquisa e extensão. “O INEP é o segundo maior em sua área, só perde para outro da Virgínia, nos Estados Unidos.”, orgulha-se o pesquisador.

NA FOTOGRAFIA QUANDO EU VISITEI EM 1990 O INEP EM UM DOS SEMINÁRIOS DE ELETRÔNICA DE POTENCIA,REALMENTE O PROF. IVO BARBI E UM ÍCONE DA ELETRÔNICA DE POTÊNCIA NO BRASIL AMERICA DO SUL E DO MUNDO.

Gate Drive Optocouplers for GaN Power Devices By Robinson Law, Applications Engineer and Chun Keong Tee, Product Manager, Broadcom Inc.

SOURCE:
BODO POWER SYSTEM

LINK
https://www.bodospower.com/

Iron Loss and Hysteretic Properties under PWM Inverter Excitation at High Ambient Temperatures Atsushi Yao, Shunya Odawara, Keisuke Fujisaki IEEJ Journal of Industry Applications-JAPAN 2018

Abstract 

We experimentally and numerically investigate the magnetic properties of magnetic materials excited by sinusoidal and pulse width modulation (PWM) inverter input at high ambient and room temperatures. We show that the iron losses under sinusoidal and PWM inverter excitations decrease with an increase in temperature. It is found that the temperature dependency of iron loss properties is related not only to major loop but also to minor loops. Furthermore, we derive the numerical expression for the hysteretic properties of the PWM inverter- and sinusoidal-fed ring tests at room temperature and 300°C by using the play model with the Cauer circuit.

LINK
https://www.jstage.jst.go.jp/article/ieejjia/7/4/7_298/_pdf/-char/en

전기회로 (Electrical Circuits, ELE258)-Ho Gi Jung-Associate Professor, Department of Future Automobile Engineering, Hanyang University

LINK ORIGINAL
http://web.yonsei.ac.kr/hgjung/
LINK ELECTRICAL CIRCUITS
http://web.yonsei.ac.kr/hgjung/Lectures/ELE258/index.html

LINK LECTURE Three-phase AC circuit
http://web.yonsei.ac.kr/hgjung/Lectures/ELE258/11%203%EC%83%81%20%EA%B5%90%EB%A5%98%20%ED%9A%8C%EB%A1%9C.pdf

Textbook
Wang Mun-sung, "(Basic) Circuit Theory (2011 Edition)

Magnetic Design for High Temperature, High Frequency SiC Power Electronics Torbjørn Sørsdahl Norwegian University of Science and Technology Department of Electric Power Engineering

Magnetic Design for High Temperature, High Frequency SiC Power Electronics 
Torbjørn Sørsdahl 
Norwegian University of Science and Technology
 Department of Electric Power Engineering 

 1 Summary
 Power electronic components which can operate at high temperatures would benefit a large number of different applications such as in petroleum exploration, aviation and electrical vehicles. Silicon carbide semiconductors have in the recent years been introduced commercially in the market. They are opening up new possibilities to create high temperature devices, due to its superior properties over silicon. Design of high temperature magnetic components is still a tedious process compared to normal temperature levels due to little information and software to simplify this process. The purpose of this thesis is to develop analytical software for high frequency magnetic design in the temperature range from 130°C, and up to 200°C. Care has been taken into developing temperature dependent loss models and thermal design. The software is primarily for inductors, but most of the theory and discussion are also valid for transformers. Prototypes have been built and tested against the software predictions and good correlation has been observed. A brief introduction to magnetic materials that can be used at elevated temperatures have been included focusing on powder cores and ferrites, since other high frequency materials could not operate at 200°C. It was found that for most materials, it is the laminations and binder agents that introduce the temperature limit. Materials are designed for specific temperatures which make it likely that when there is a larger commercial interest for higher temperatures, new materials will be developed. Core characterization of ferrites and powder cores was performed with a Brochause steel tester up to 10 kHz, and the losses up to 100 kHz were measured using an oscilloscope and amplifier approach. The characterization was performed at 20°C 108°C and 180°C. The measurements show that the analytical loss data provided by the manufacturers underestimates the losses in Sendust and MPP materials, while there is a good correlation in High Flux, R-ferrite and N27. New Steinmetz parameters were calculated for MPP and Sendust for 20 kHz. Temperature primarily influences only Sendust up to 180 °C by a factor of 10-20 %, the little temperature dependence is in powder cores due to very high curie temperature. Winding configurations have been investigated, and Litz wire for 200°C do not seem to exist commercially at this date, however wire for 130°C was successfully used in several 180°C experiments, but permanent degradation was observed in wires which had been exposed for several hours. It was found that the insulation in enamel coated round conductors have problems at elevated temperatures under the rated temperature in the areas where the wire was bent, this was not observed in Litz wire. It has been shown that parallel connection of smaller powder cores can in some cases be used to obtain smaller designs with better thermal dissipation than with a single core. Leakage capacitance has been measured in several designs and by inserting an air gap between layers the capacitance was reduced in the same order as a Bank winding. Output filter for dv/dt, Sinus, and a step down converter have been calculated and built. The step down filter has been tested in a buck converter, and compared to analytical data.
LINK
https://pdfs.semanticscholar.org/cd3d/67fc303646f9e09b5d16c9d486a0790090f1.pdf