- 學位論文
短弧氙燈電子安定器製作
Design an Electronic Ballast for Short-Arc Xenon Lamps
摘要
本文提出一種用於500W短弧氙燈調光的電子式安定器，調光範圍約32%至100%。短弧氙燈啟動時，需要將近20kV以上的脈衝高壓，啟動後需要有一穩定的電壓使燈管穩定的發光。因此，本文之短弧氙燈電子安定器主要包含高壓點火電路與直流電源供應電路架構，高壓點火電路將採用兩級升壓方式提供點燈時所需之高壓；直流電源供應電路是以諧振式轉換器結合整流濾波電路設計，提供一可調整的穩定電壓、電流供燈管調光使用。 本文所設計的短弧氙燈電子安定器與傳統式短弧氙燈安定器相較之下其優點有：1.高壓點火電路採用兩級式升壓方式，以降低升壓變壓器之體積；2.直流電源供應電路採用具有零電壓切換的轉換器，以高頻切換方式，降低電路上元件體積，並減少開關上的損失；3.採用調頻方式，無須額外增加任何調光電路，即可輕易達到調光之目的。最後實際製作一500W短弧氙燈電子安定器雛型電路，並經由IsSpice模擬軟體與實測結果來驗證理論之可行性。
並列摘要
In this thesis, a dimmable electronic ballast for a 500W short-arc Xenon lamp is proposed with its lighting capability ranging from 32% to 100%. To start a short-arc Xenon lamp, a pulse voltage near 20 kV is required and, successively, a stable voltage must be maintained to keep the lamp lighting steadily. Therefore, the electronic ballast of a short-arc Xenon lamp primarily comprised a high-voltage igniting circuit and a DC power supply for energizing the lamp. The high-voltage igniting circuit is composed of a two-stage voltage booster to furnish high enough voltage for ignition. The DC power supply is designed by making use of a resonant converter to generate a high frequency power source, which is rectified and filtered to produce a smooth and stable DC voltage to furnish the lamp with steady current. By comparing the proposed short-arc Xenon lamp electronic ballast with the conventional one, the advantages of the proposed new design include: 1. Use of a two-stage voltage booster design of high-voltage igniting circuit effectively reduces the size of transformer; 2. Zero-voltage-switching on converter design leads to decreasing of device size and lowering of switching losses; 3. Application of frequency-modulation technique results in easy adjustment of lighting without needing any extra dimmer circuit cost. Finally, a prototypical dimmable electronic ballast for a 500W short-arc Xenon lamp is designed and realized. The validity is confirmed by comparing the practical measurement results and the IsSpice simulation ones.