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

Analysis of Discharge Lamp Driving Characteristics using PSpice

Analysis of Discharge Lamp Driving
Characteristics using PSpice
Jeong-Ho Cho
Department of Electrical Engineering,
Graduate School of Industry,
Pusan National UniversityAbstract
A new PSpice dynamic fluorescent lamp model has been developed which describes the
non-linear resistance of fluorescent lamps operating at high-frequency.
The model is based on exponential approximation that represents the equivalent resistance
variation as function of power, constructed, by experimental results for several power levels.
Simulation and experimental results are presented to verify the feasibility of the model and,
moreover, and electronic ballast example using the proposed model is presented to further
demonstrate its applications