臺灣博碩士論文加值系統

本文提出一應用於螢光燈管的單級高功因E類共振換流器電子安定器。電路的架構是由具有功因修正功能之降升壓轉換器與E類共振換流器所整合而成。整合後之安定器，僅使用一個主動功率開關。將此主動開關以固定頻率切換，且使降升壓轉換器操作於非連續電流模式，可在輸入電源端獲得高功率因數。本電子安定器採用脈波寬度調變方式，控制螢光燈預熱及啟動，藉由調整主動開關的導通率，可提供適當的預熱電流；透過適當的參數設計，可得到足夠高的點燈電壓，並使主動開關於零電流切換導通，承受較低的電壓以減少切換損失，提高電路效率；外加一控制電路，在預熱期間，完全消除熾熱電流，使燈絲達到適當預熱溫度，才啟動燈管，以延長燈管壽命。
本文採用螢光燈的等效電阻模型，應用基本波分析法，建立結合安定器與燈管之等效電路。以此等效電路為基礎，推導電路參數的設計方程式及推演其設計流程，據以設計一電子安定器，推動OSRAM PL-27W小型螢光燈管，進行電腦模擬，並實際製作電路量測。實驗結果證實此電子安定器，可達到所預期的性能。

A single-stage high-power-factor electronic ballast with class E inverter is proposed for driving the fluorescent lamp. The circuit configuration is obtained from the integration of a buck-boost converter for power-factor- correction (PFC) and a class E resonant inverter for ballasting. The integrated ballast circuit requires only one active power switch and simple control. Operating the buck-boost converter in discontinuous conduction mode (DCM) at a fixed frequency, the electronic ballast can achieve nearly unity power factor. With pulse-width-modulation (PWM), the electronic ballast can provide an appropriate filament current for preheating, a high voltage for ignition, and then a desired lamp current for steady-state operation. An additional control circuit is included to eliminate the glow current during preheating stage.
The operation of the ballast-lamp circuit is analyzed by fundamental approximation. Computer simulations are made and design equations are derived on basis of the power-dependent resistance model of the fluorescent lamp. With carefully designed circuit parameters, the active power switch can be switched on at zero current to reduce the switching losses leading to a higher efficiency.
An experimental circuit designed for a PL-27W compact fluorescent lamp is built and tested to verify the computer simulations and analytical predictions. Experimental results show that satisfactory performances can be obtained on the proposed electronic ballast.

中文摘要 I
英文摘要 II
目錄 III
圖表目錄 V
第一章簡介 1
1-1研究動機 1
1-2本文大綱 5
第二章電子安定器及燈管模型 6
2-1電子安定器基本架構 6
2-1-1功因修正電路 6
2-1-2共振式換流器 8
2-2等效燈管電阻模型 15
第三章單級高功因E類共振換流器之電子安定器 19
3-1電路架構 19
3-2脈波寬度調變控制電路 21
3-3電路工作原理與工作模式分析 22
3-3-1最佳化工作模式 23
3-3-2 次佳化第一型工作模式 26
第四章電路特性分析 31
4-1功因修正電路分析 31
4-2 E類共振換流器電路分析 34
4-2-1 E類共振換流器之等效電路 34
4-2-2最佳化工作電路分析 36
4-3 燈絲功率41
第五章燈管啟動42
5-1燈絲預熱43
5-2預熱啟動電路44
5-3預熱與點燈模擬電路模型46
第六章應用實例及量測48
6-1電路參數設計48
6-2電腦模擬 55
6-3實測結果 58
6-3-1控制電路58
6-3-2測量結果59
6-4燈管啟動 61
第七章結論與討論 64
參考文獻 66

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