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Title: Modeling, analysis and practical implementation of dimmable compact fluorescent lamp
Other Titles: Ke tiao guang jie neng ying guang deng zhi jian mo, fen xi yu shi xian
可調光節能螢光燈之建模, 分析與實現
Authors: Tam, Pok Wai (譚博維)
Department: Department of Electronic Engineering
Degree: Doctor of Philosophy
Issue Date: 2007
Publisher: City University of Hong Kong
Subjects: Fluorescent lamps.
Ballasts (Electricity)
Notes: CityU Call Number: TK4386 .T35 2007
145 leaves : ill. 30 cm.
Thesis (Ph.D.)--City University of Hong Kong, 2007.
Includes bibliographical references (leaves 138-141)
Type: thesis
Abstract: The traditional compact fluorescent lamp (CFL) cannot be dimmed by a triac dimmer. This research work addresses the technical issues behind the incompatibility between the triac dimmer and the internal ballast of CFLs. A practical evaluation is done of the two existing dimming approaches (variable DC-link voltage control and variable frequency control) on commercial 4-wire dimmable electronic ballast for tubular fluorescent lamp. The more efficient dimming method (variable DC-link voltage control) is chosen as the dimming approach applied to the design of a dimmable CFL. Based on the charge pump concept and voltage dimming control, a low-cost design for a dimmable CFL, compatible with triac dimmers, is proposed. This design is based on the conventional ballast of CFL, modified by introducing the charge pump circuit. A behavioral model for analyzing the nonlinear charge-pump-added self-oscillatory driving ballast is also developed to facilitate the design process. Two different models of dimmable CFL, running at 120V 60Hz and 220V 50Hz, were built and tested. In order to explore new design tools, a semi-empirical Pspice physical lamp model is established for application to various types of fluorescent lamps.
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