DEVELOPMENT OF METHODOLOGY OF SELF-OSCILLATING ELECTRONIC BALLAST DESIGN WITH UNIVERSAL INPUT

ABSTRACT
Master Thesis
Programa de Pós-Graduação em Engenharia Elétrica
Universidade Federal de Santa Maria
DESENVOLVIMENTO DE METODOLOGIA DO PROJETO
DO REATOR ELETRÔNICO AUTO-OSCILANTE
COM ENTRADA UNIVERSAL
DEVELOPMENT OF METHODOLOGY OF SELF-OSCILLATING
ELECTRONIC BALLAST DESIGN WITH
UNIVERSAL INPUT
AUTHOR: JULIANO DE PELEGRINI LOPES
ADVISOR: ÁLYSSON RANIERE SEIDEL
Place and date: Santa Maria, January 14th, 2010.
This work presents the design and analysis of an electronic system with universal
input to supply a fluorescent lamp. The system includes a self-oscillating electronic ballast
and an additional circuit which allows keeping the nominal lamp power although a variation
of the input voltage. The electronic ballast design comprises some steps: resonant filter
design, self-oscillating gate driver design, additional circuit design and stability test. The
electronic ballast is represented as a nonlinear control system in order to achieve a feasible
design methodology. Moreover, the system must be analyzed considering the describing
function method and the extended Nyquist stability criterion. The proposed electronic ballast
must maintain the main characteristics of the traditional self-oscillating electronic ballast.
Besides that, the additional circuit has a small number of components and it allows the input
voltage full range with automatic selection of the switching frequency. The design, simulation
and experimental results of the prototype are presented.
FULL THESIS:
http://www.ufsm.br/ppgee/docs/DISSERTACOES/2010/Juliano%20Lopes_PPGEE_Mestrado%202010.pdf

USING OF VARIABLE-OUTPUT-VOLTAGE HIGH PFC AC-DC CONVERTER FOR COMPACT FLUORESCENT INTEGRAL

FULL PAPER HERE:
http://caveromiranda.galeon.com/rvol16no2p14.pdf

USING OF VARIABLE-OUTPUT-VOLTAGE
HIGH PFC AC-DC CONVERTER FOR
COMPACT FLUORESCENT INTEGRAL
LAMPS FEEDING
Abstract – This article presents a design of a variable–
output-voltage high-power-factor-correction AC-DC
converter used for compact integral fluorescent lamps
feeding. Those lamps condition direct incandescent lamp
retrofitting with all the profits that the fluorescent
lighting offers. The main problems with the compact
integral fluorescent lamps sold in Brazil are the absence
of power factor correction (for input power below 60 W)
and the absence of filament pre-heating and input filter.
The proposed rectifier resolves these problems and offers
the dimming function.
Mikhail M. Polonskii was born in Stavropol, Russia, on 3 de October, 1956. He received the M.Sc. degree from the High Technical School named after Baumann of Moscow in 1978, and the Ph. D. degree from the State University of Technology (STANKIN), Moscow, in 1992. At present he is Adjunct Professor at Electrical Engineering Department of Universidade de Passo Fundo, Brazil. His research interests include Mechatronics, Engineering Education and Music Visualization.

PROJETO DE REATOR MULTIRESSONANTE PARA LÂMPADAS MULTIRESONANT BALLAST DESIGN FOR A T5 28W MODEL FLUORESCENT LAMP

Jacob Palis: The Importance of Science for Developing Countries - 1

JACOB PALIS JUNIOR
•Bacharel (Engenharia) - Universidade Federal do Rio de Janeiro, UFRJ - 1962.
•Mestre - Universidade da Califórnia, Berkeley - 1966.
•Ph.D. - Universidade da Califórnia, Berkeley - 1967.
•Pesquisador titular - Instituto de Matemática Pura e Aplicada, IMPA - 1968.
Doutor (Ciência) - Universidade de Warwick, Coventry - 2000.
•Ganhador do Prêmio Balzan 2010.
LECTURE IN the Abdus Salam International Centre for Theoretical Physics (ICTP)

XIV Conferência Internacional de Eletricidade Atmosférica

A Conferência Internacional de Eletricidade Atmosférica (ICAE) é o maior evento mundial sobre raios, realizada desde 1954. Em 2011 acontece pela primeira vez no Hemisfério Sul, na cidade do Rio de Janeiro, entre os dias 7 e 12 de agosto.

Abordará os aspectos técnicos e científicos associados à ocorrência de fenômenos elétricos na atmosfera, em particular as descargas atmosféricas ou raios. O principal objetivo é apresentar pesquisas realizadas em todo o mundo e o desenvolvimento tecnológico na área.

A ICAE 2011 será a maior conferência sobre raios da história, com um número recorde de 317 trabalhos completos (a marca até então era de 300 trabalhos na conferência de 1992) e de 37 países participantes (superando os 30 países na China em 2007). O Brasil é o país com maior número de trabalhos a serem apresentados (77). Além dos trabalhos técnicos, estão previstas sete palestras especiais
MAIS INFORMAÇOES :
http://www.icae2011.net.br/index.pt.html