| Summary: | 碩士 === 國立中山大學 === 電機工程研究所 === 83 === An electric circuit model is developed for characterizing the
electrical behavior of the fluorescent lamp with dimming
operation. The proposed model consisting of two power dependent
equations describing the lamp voltage and current can be
derived from the tested results on a given specific lamp. The
derived equations predicting the circuit behavior precisely
provides a useful tool for an engineer to determine the circuit
parameters and to analyze the performance of the electronic
ballast with dimming operation. Based on the derived equations,
three possible dimming operation methods (voltage control,
frequency control, and impedance control) can be explored. The
electronic ballast with the series resonant half bridge
inverter is used as a specific example to describe the dimming
operating characteristics of the fluorescent lamp and the
analyses are examined by experimental tests on a prototype
electronic ballast.
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