複金屬燈通常採用較高的點燈電壓，確保燈管電極發生電壓崩潰，因而傷害電極，減短燈管壽命。觀察點燈的過程中，電極崩潰前產生的暗電流(Dark Current)，會影響燈管的崩潰電壓。本文根據不同點燈波形所產生的暗電流，提出燈管崩潰前的等效模型電路，利用電腦程式模擬驗證，並據以探討不同的點燈高壓波形對崩潰電壓的影響。研究中，將複金屬燈啟動燈管的點燈電壓分成單脈衝高壓、步階高壓和多脈衝高壓三種不同的波形，說明暗電流在不同點燈波形中對燈管崩潰時的影響，實驗結果顯示，點燈時提供燈管較大的暗電流或是多次的暗電流都可以達到降低燈管崩潰電壓，並且降低點燈高壓對燈管電極及電子安定器電路元件的衝擊，提供設計點火電路的參考。

Conventionally, metal halide lamps were struck by voltages higher than those required for breaking down the electrodes to ensure successful ignition. These high ignition voltages may hurt the electrodes to some extent, leading to a shorter lamp lifecycle. In practice, the breakdown voltage can be affected by the dark current which occurs when a voltage is applied on lamp before the electrodes have been broken down. A lamp model to account for the dark current is derived from the test results. Three ignition schemes with single-pulse, multiple pulses and step voltage are used for describing the effect of the dark current on the breakdown voltage. Experimental results exhibit that the breakdown voltage can be lowered by applying a higher dark current or allotting more times of dark current to the lamp. The investigation provides useful information for the design of the ignition circuit.

中文摘要 I
英文摘要 II
目 錄 III
圖 次 V
表 次 VIII
第一章 簡介 1
1-1 前言 1
1-2 研究背景與動機 2
1-3 本文大綱 5
第二章 複金屬燈點燈特性 6
2-1 燈管啟動暫態 6
2-2 影響燈管崩潰電壓因素 11
2-4 點燈波形定義 15
第三章 暗電流與燈管崩潰前的等效電路模型18
3-1燈管崩潰前等效電路 18
3-2測試電路 23
3-3 參數量測與模擬 24
第四章 點燈波形與燈管崩潰電壓關係 43
4-1 單脈衝高壓點燈 43
4-2 步階高壓點燈 51
4-3 多脈衝高壓點燈 57
第五章 點火電路實例驗證 65
5-1 單脈衝高壓點燈實例 65
5-2 步階高壓點燈實例 69
5-3 多脈衝高壓點燈實例 73
第六章 結論與討論 74
參考文獻 76

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