具均流全橋相移式冷陰極螢光燈管驅動電路

Full-Bridge Phase-Shifted Driving Circuit with Current Balancing for Cold Cathode Fluorescent Lamps

黃聖文(Sheng-Wen Huang)

指導教授 ： 陳秋麟

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2007年)

https://doi.org/10.6342/NTU.2007.10624

摘要

本論文主要在討論具均流全橋相移式冷陰極螢光燈管驅動電路，由於傳統多燈管系統中，燈管阻抗不一定相同，使流經各燈管的電流差異很大，造成亮度不均勻。本文的目的就是使用平衡變壓器，讓流經各燈管的電流差異變小，使各燈管亮度均勻。本文使用之電路架構為全橋相移式換流器，使用全橋相移式脈波寬度調變控制，使換流器在切換過程達到零電壓切換，降低切換過程的損耗，並詳細說明其動作原理、最後綜合以上的方式實作一台冷陰極螢光燈管驅動電路，以實驗結果驗證理論分析。

關鍵字

全橋 ； 相移 ； 冷陰極螢光燈管

並列摘要

The aim of this thesis is to study and implement a full-bridge phase-shifted driving circuit with current balancing for cold cathode fluorescent lamps. Because the impedance of each lamp in a traditional multi-lamp system is not necessarily the same, the current through each lamp would be dramatically different. Therefore, the brightness of the system is not uniformly distributed. The aim of this thesis is to utilize balancing transformers to reduce the current differences between each lamp such that the brightness of each lamp maintains uniform. The circuit architecture in the thesis is full-bridge phase-shifted inverter. It utilizes full-bridge phase-shifted pulse width modulation to achieve zero voltage switching and reduce the switching loss. In the end, a driving circuit for cold cathode fluorescent lamp is demonstrated and the experimental results can verify the theoretical analysis.

並列關鍵字

Full-Bridg ； Phase-Shifted ； Cold Cathode Fluorescent Lamps

參考文獻

[1] J. H. Kahl and F. A. Dyemartin, “Cold Cathode Fluorescent Lamps (CCFLs)”, AI-001, Applications Information, JKL Component Corporation,1997.

[2] J. H. Kahl, “Cold Cathode Fluorescent Lamps (CCFLs) -- A History and Overview”, AI-002, Applications Information, JKL Component Corporation, 1997.

[3] J. H. Kahl, “Understanding Cold Cathode Fluorescent Lamps (CCFLs) --A History and Overview”, AI-007 Applications Information, JKL Component Corporation, 1997.

[4]康仕政，“單級高功因電子式安定器之研製”，國立成功大學電機工程學系

[5] M. A. Cayless and A. M. Marsden, Lamp and Lighting, London: Edward Arnold, 3rd edition, 1983.