新型紫外光消毒燈驅動電路之研製

隨著新冠病毒的流行，消毒燈的發展得到了重視。與傳統汞燈相比，紫外光燈(Ultraviolet Lamps, UV)具有壽命長、效率高、體積小，且對環境無任何負擔，並更加的安全和環保。一般市售短波長的紫外光消毒燈(UV-C LED)驅動電路多採用二級架構，其缺點為元件數量多、電路體積龐大，且因為經過多級功率轉換導致輸入能量的使用效率降低。因此，本論文提出應用於交流電壓供電之新型紫外光消毒燈驅動電路，由降壓式轉換器整合返馳式轉換器所構成的單級式電路，並將變壓器的漏電感能量進行回收，以提高變壓器的使用效率。與傳統兩級式電路相比，本論文所提出之電路所使用的功率開關與使用元件數目較少，因此擁有降低驅動電路成本與提高能量轉換效率等特點。本論文已完成分析新型紫外光消毒燈驅動電路的動作原理，並研製一個應用於交流輸入電壓為110V、輸出功率為10.8W(90V/0.12A)的紫外光消毒燈雛型驅動電路。最後，將實測結果與SIMetrix-SIMPLIS模擬軟體之模擬波形進行比較，以驗證本論文提出之新型紫外光消毒燈驅動電路之可行性。此外，實測本論文研製的紫外光消毒燈驅動電路，可得到效率約為92%，功率因數約為0.91，輸出電壓漣波率為1.298%，以及輸出電流漣波率為4.44%。

關鍵字

紫外光消毒燈；驅動電路；單級式電路；功因修正

並列摘要

With the spread of the novel coronavirus, the development of disinfection lamps has received significant attention. In comparison to traditional mercury lamps, ultraviolet lamps (UV lamps) have advantages such as long lifespan, high efficiency, small size, and they pose no environmental burden, making them safer and more environmentally friendly. Conventional commercially available short-wavelength ultraviolet disinfection lamps (UV-C LED) often employ a two-stage architecture for the driving circuit. The drawbacks of this approach include a large number of components, bulky circuit size, and reduced efficiency due to multiple stages of power conversion. Therefore, this thesis proposes a novel ultraviolet disinfection lamp driving circuit for AC voltage supply. It consists of a single-stage circuit integrating a buck converter and a flyback converter, Leakage energy from the transformer is also recovered to improve its efficiency. In comparison to traditional two-stage circuits, the proposed circuit in this thesis uses fewer power switches and components, resulting in lower driving circuit cost and improved energy conversion efficiency. This thesis has analyzed the operation principles of the novel ultraviolet disinfection lamp driving circuit and developed a prototype driving circuit for ultraviolet disinfection lamps with an AC input voltage of 110V and an output power of 10.8W (90V/0.12A).Finally, the measured results are compared with the simulation waveforms from the SIMetrix-SIMPLIS software to verify the feasibility of the proposed novel ultraviolet disinfection lamp driving circuit. Furthermore, the measured efficiency of the developed ultraviolet disinfection lamp driving circuit in this thesis is approximately 92%, with a power factor of about 0.91, the output voltage ripple is 1.298%, and the output current ripple is 4.44%.