新型單級高功因高壓鈉燈電子安定器之研製

高壓鈉燈為高強度氣體放電燈的一種，具有高發光效率與使用壽命長等特點，可應用於路燈、碼頭與體育館等照明場合。傳統三級式與兩級式的高壓鈉燈電子安定器經過三次或兩次的電能轉換階段，導致效率不高，且功率級元件數目較多，電路成本較高。因此，本論文整合具耦合電感之交錯式降升壓以及具降壓功能之全橋換流器成為新型單級式電路架構，具有減少功率開關與元件數目、降低電路成本與提高轉換效率等特點。藉由控制耦合電感操作在不連續導通模式下，可自然達到高功因與低輸入電流總諧波失真。且安定器提供低頻方波電源以驅動高壓鈉燈，可避開音頻共振的問題。此外，本論文分析單級安定器的動作原理，且已完成研製一個250W高壓鈉燈電子安定器雛型電路。最後，將實測結果與IsSpice模擬波形進行比較，藉由實驗結果可驗證本論文研製的電子安定器在交流輸入電壓110V時，具有高功因(>0.99)、低輸入電流總諧波失真因數(<3%)、高效率(>89%)等優點。

關鍵字

照明；音頻共振；高壓鈉燈；電子安定器；路燈；功因修正

並列摘要

The high-pressure sodium lamp (HPS) is a kind of high-intensity gas discharge lamp with high luminous efficiency and long service life, and can be applied to lighting occasions such as street lamps, docks and stadiums.The traditional electronic ballast for HPS lamps has many power switches and passive components and limited circuit efficiency due to three-stage or two-stage power conversions. Therefore, this thesis presents a single-stage electronic ballast for HPS lamps with high power factor. The features of the proposed ballast are reduced numbers of circuit components, cost-effectiveness, and high efficiency. The proposed ballast can obtain high power factor and low total-harmonic-distortion (THD) of input utility-line current by designing the coupled inductor at discontinuous-conduction-mode (DCM). In addition, the presented ballast supplies low-frequency square-wave sources to the HPS lamp for avoiding acoustic-resonance. Besides, the thesis analyzes the principle operation of the proposed single-stage electronic ballast, and an electronic ballast prototype circuit for supplying a 250 W high-pressure sodium lamp has been already implemented. Finally , compared with simulated waveforms obtained by IsSpice sofeware and the experimental results, the thesis can demonstrate the advantages includes high power factor (>0.99), low utility-line current THD (<3%), and high circuit efficiency (>89%).

並列關鍵字

Lighting ； Acoustic resonance ； High-pressure sodium lamp ； Electronic ballast ； Street light ； Power Factor Currection

參考文獻

[1] 許招庸，“現代照明實務”，全華股份有限公司，民國92年7月。

Google Scholar

[2] B. Cook, “New developments and future trends in high-efficiency lighting,” Engineering Science and Education Journal, vol. 9, pp. 207-217, Oct. 2000.