本研究採用半橋式串聯諧振換流器，實現類電流源及定電流源，可串接多組非接觸式變壓器，驅動多盞串接發光二極體(Light Emitting Diode, LED)燈。類電流源之驅動電路係於諧振迴路中加入串聯補償電容，可降低調光開關動作時諧振電流的變化量；定電流源則是於主電路中加入電流-頻率迴授控制，諧振電流在LED燈調光時維持恆定。為提升電路效率，在非接觸式變壓器二次側加入並聯補償電容與漏電感諧振。
本論文分析電路操作原理、推導參數設計方程式與設計流程，實際製作五盞24 W白光LED燈之驅動電路，並以變頻調光及整數波調光兩種方式對進行調光測試。調光開關具零電流切換，可減少切換損失。經實驗量測，此電路架構可同時調光與個別調光，調光範圍可從0到100%，轉換電路效率於額定輸出時，類電流源效率為86.20%，定電流源系統電路效率為84.03%。
關鍵詞：類電流源、定電流源、發光二極體、非接觸式變壓器、諧振換流器、整數波調光控制

A half-bridge series-resonant inverter adopted to realize the quasi current source and the constant current source with a number of contactless transformers in series for multiple light emitting diode (LED) lamps. The quasi current source is achieved by adding compensation capacitors in series with the primary windings of the contactless transformers while the constant current source is accomplished by introducing the current-frequency feedback control. In addition, compensation capacitors are paralleled on the secondary sides forming a resonant circuit with the leakage inductances of the contactless transformers to improve the circuit efficiency.
In the thesis, circuit operation is first analyzed. Accordingly, the design equations and the design procedure are derived. A laboratory circuit is built for the five 24-W white LED lamps. Experimental results demonstrate that the driving circuit can be dimmed individually or simultaneously in a full range from 0 to 100%. The measured efficiency of the LED driving circuit is 86.20% at the rated power for the quasi current source, and 84.03% for constant current source.
keywords : light emitting diode (LED), contactless transformer, resonant inverter, zero-voltage switching (ZVS), zero-current switching (ZCS), integral cycle control.

致謝 I
中文摘要 II
英文摘要 III
目錄 IV
圖目錄 V
表目錄 VIII
第一章 簡介 1
1-1 研究背景與動機 1
1-2 LED簡介 3
1-3 論文大綱 7
第二章 驅動電路架構介紹與非接觸式變壓器分析 8
2-1 變壓器等效阻抗模型推導 8
2-2 傳統LED燈驅動電路 10
2-3 驅動電路架構 11
2-4 驅動電路工作模式分析 13
2-5 非接觸式變壓器基本原理與耦合結構模擬 16
第三章 具非接觸式變壓器之多盞LED燈驅動電路 20
3-1 電路參數設計方程式 20
3-2 電流-頻率迴授控制 26
3-3 整數波調光控制 29
第四章 設計實例與實驗量測 31
4-1 設計流程 31
4-2 設計實例 32
4-2-1 驅動電路參數設計實例 32
4-2-2 迴授系統設計實例 36
4-3 類電流源驅動電路實驗量測 39
4-3-1 電路波形 39
4-3-2 變頻調光 40
4-3-3 整數波調光 42
4-3-4 電路效率 62
4-4 電流源驅動電路實驗量測 63
4-4-1 整數波調光 64
4-4-2 電路效率 74
第五章 結論與未來研究方向 75
5-1 結論 75
5-2 未來研究方向 75

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