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研究生:李正中
研究生(外文):Cheng-Chung Lee
論文名稱:高頻電子安定器驅動螢光燈之故障現象探討及保護電路設計
論文名稱(外文):Life-End Detection and Protection of High-Frequency Electronic Ballast Driven Fluorescent Lamps
指導教授:莫清賢莫清賢引用關係
指導教授(外文):Chin-Sien Moo
學位類別:碩士
校院名稱:國立中山大學
系所名稱:電機工程學系研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:45
中文關鍵詞:調光電子安定器螢光燈壽命終了保護電路
外文關鍵詞:fluorescent lampdimming operationprotection circuitelectronic ballastlife-end
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本論文藉由觀察螢光燈壽命即將終了前的故障現象,並依此特性設計螢光燈故障偵測保護電路。螢光燈在壽命終了前仍舊可以被點亮,但卻無法維持正常工作,其外觀會產生單端燈絲發紅和弧光閃爍等現象,而且很明顯的發光效率比正常工作時來得低,弧光閃爍嚴重時甚至會使燈絲燒毀進而熄滅。
此外,在研究中發現當故障現象發生時,燈管電壓和燈管電流波形都會有正負峰值不對稱的情形,其中燈管電壓的不對稱情形比起燈管電流明顯許多,除此之外,燈管電壓還會含有直流成分。根據以上觀察所得,設計適用於可調光之螢光燈電子安定器故障偵測保護電路,經由實驗驗證電路確實能夠達到故障偵測及保護的作用。
The fault phenomena of fluorescent lamps are investigated by observing the operations in the last period of the life cycle. Accordingly, fault detecting and protection circuits are designed.
Before coming to the life-end, the lamps can be started up, but are operated abnormally. A ruddy glow may occur at one end of the cathode filaments and an unstable arc may happen to the lamp. Obviously, the light efficiency becomes relatively low. The arc instability eventually results in a totally damaged fluorescent lamp. It is found that both waveforms of the lamp voltage and the lamp current are asymmetrical and have unequal positive and negative peak values. The asymmetry is more significant for the lamp voltage. In addition, a dc component is present in the lamp voltage. Based on these investigated results, the detection and protection circuits are designed for high-frequency electronic ballasts under dimming operations as well at the rated power. The experiments show that the detection and protection circuits can work effectively.
中文摘要 I
英文摘要 II
目錄 III
圖表目錄 IV
第一章 簡介 1
1-1 研究動機 1
1-2 本文大綱 2
第二章 螢光燈壽命終了的現象探討 4
2-1 螢光燈之等效模型 4
2-2 影響螢光燈壽命的因素 6
2-3 燈管黑頭現象 7
第三章 螢光燈故障量測 11
3-1 量測電路 11
3-2 螢光燈操作於額定功率故障現象 12
3-3 螢光燈於調光下故障現象 18
3-4 燈絲電流對故障現象的影響 22
第四章 電子安定器保護電路 27
4-1 燈管電壓直流成分偵測保護電路 27
4-2 燈管電壓不對稱偵測保護電路 29
4-3 直流阻隔電容電壓偵測保護電路 32
4-4 實驗量測 33
第五章 結論與討論 40
參考文獻 43

圖 表 目 錄
圖2-1 螢光燈基本構造與放電特性示意圖 4
圖2-2 螢光燈等效電路模型 5
圖2-3 外加燈絲電流量測電路 8
圖2-4 不同燈絲電流對燈管黑頭之影響 9
圖2-5 點滅實驗燈管黑頭現象 9
圖3-1 實驗量測電路 12
圖3-2 燈絲發紅 13
圖3-3 燈絲發紅之燈管電壓與電流波形 13
圖3-4 弧光閃爍之燈管電壓與電流波形 14
圖3-5 操作於額定功率故障燈管電壓與電流波形 16
圖3-5 操作於額定功率故障燈管電壓與電流波形(續) 17
圖3-6 燈管電壓與直流阻隔電容電壓波形 18
圖3-7 操作於50%額定功率故障燈管電壓與電流波形 20
圖3-8 操作於20%額定功率故障燈管電壓與電流波形 21
圖3-9 操作於10%額定功率故障燈管電壓與電流波形 22
圖3-10 燈管操作於額定功率故障波形 24
圖3-11 燈管操作於50%額定功率故障波形 25
圖4-1 傳統快速啟動型電子安定器 27
圖4-2 燈管電壓直流成分偵測保護電路 29
圖4-3 燈管電壓不對稱偵測保護電路 30
圖4-4 非反相史密特觸發器狀態圖 31
圖4-5 半橋式快速啟動型電子安定器 32
圖4-6 直流阻隔電容電壓偵測保護電路 33
圖4-7 故障燈管啟動暫態與穩態波形 35
圖4-8 正常燈管啟動暫態與穩態波形 35
圖4-9 燈管操作於額定功率故障波形 36
圖4-10 燈管操作於50%額定功率故障波形 37
圖4-11 燈管操作於10%額定功率故障波形 38
表4-1 電子安定器與螢光燈規格 34
表4-2 燈管電壓直流成分偵測保護電路參數 34
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