本文提出一應用於螢光燈管的可調光單級高功因電子安定器，電路架構由準半橋共振換流器及降升壓轉換器所組成。電路的切換頻率固定，降升壓轉換器操作在不連續工作模式以提供高功率因數。此安定器係利用非對稱脈波寬度調變的控制方式，調整傳遞到負載共振換流器的有效電壓來改變燈管功率，以達到調光的目的，並在調光範圍內皆可確保功率開關元件在零電壓或零電流切換導通。
針對整合的單級高功因電子安定器於調光操作時，各項操作條件的異動作探討，螢光燈管於電路分析時採用功率函數等效電阻模型。依據電路工作特性分析探討的結果，可建立安定器參數的設計流程。最後以T8-36W的螢光燈管當負載，實際製作非對稱脈波寬度調變的單級高功因電子安定器，於大範圍的調光操作下，驗證理論的分析結果。

A single-stage high-power-factor electronic ballast is designed for fluorescent lamps with dimming capability. The circuit configuration is originated from the integration of the half-bridge resonant inverter and the buck-boost converter. The buck-boost converter is designed to operate in discontinuous conduction mode (DCM) to provide nearly unit power factor at a fixed switching frequency. With asymmetrical pulse-width-modulation (APWM), the lamp power can be effectively regulated. The power switches of the inverter exhibit either zero-voltage-switching (ZVS) or zero-current-switching (ZCS) over the whole dimming range. Design equations are derived and computer analyses are performed based on a power-dependent lamp model and fundamental approximation. Design guidelines for determining circuit parameters are provided. A prototype circuit for a T8-36W fluorescent lamp is built and tested to verify the analytical predictions.

目 錄
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 4
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負載共振式換流器 6
2-1-2功因修正電路 7
2-2燈管電路模型 9
2-3脈波寬度調變(PWM)調光控制 13
第三章 單級高功因調光電子安定器 18
3-1電路架構 18
3-2工作模式分析 20
第四章 電路特性分析 39
4-1功因修正電路分析 39
4-2負載共振式換流器 42
4-2-1等效電路 42
4-2-2燈管啟動電壓 44
4-2-3燈絲功率 45
4-3零電壓切換導通 46
4-4不連續操作模式 50
第五章 電路參數設計 51
5-1建立燈管模型 51
5-2降升壓電感 的決定 54
5-3針對適當的燈絲功率設計並聯的燈絲電容 55
5-4零電壓切換導通的操作條件 56
5-5不連續電流模式(DCM)操作條件 59
5-6負載共振電路之 及 的設計 62
第六章 實驗量測 64
6-1非對稱脈波寬度調變(APWM)控制電路 64
6-2實測結果 67
6-3燈絲預熱 75
第七章 結論與討論 79
參考文獻 81

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