本論文目的為設計一高效率之發光二極體路燈之驅動電路。主功率轉換電路架構採單相相位控制整流器，將交流110/220 V，60 Hz之市電電源整流，並加以控制，輸出至由高亮度白光LED陣列組成之路燈。相位控制整流驅動電路可採用半控轉換器;或對稱相位控制整流器，利用閘流體或功率電晶體開關，改變整流器於一電源週期內之導通角度，調節輸出至LED之平均電流。此相位控制整流器操作於低頻，可避免高頻切換所引發電磁干擾的問題，採用切換速度較慢、價格較低廉之功率開關元件，且不需使用電解濾波電容。當電源電壓與負載變動時，LED路燈光輸出之色度在容許範圍內，驅動電路在適當的電路參數設計下，仍可滿足輸入高功因的需求。
本研究以200W之LED路燈為設計標的，採微控制器作為控制電路單元，使電路參數與控制功能易於修改且更具彈性；並加入過電壓、電流保護機制，防止供電異常時造成LED路燈毀損。由實驗結果可得知相位控制整流器經過適當地電路參數設計，在額定負載時功率因數可達到0.92，電路效率為93 %。

A high efficiency driver is designed for light emitting diode (LED) street lamps in the thesis. The main power conversion circuit employs a phase-controlled rectifier to convert the power from the ac mains of 110/220 V, 60 Hz directly into a dc source, providing the required output current for the street lamps formed by arrayed high brightness white LEDs. The phase-controlled rectifier of the LED driver circuit can be a conventional semi-converter or a rectifier with symmetrical phase control, which makes use of thyristors and power transistors, respectively, to regulate the LED current by means of adjusting the conduction angles in a cycle of the ac line. The phase-controlled rectifiers may exclude the use the bulky electrolyte capacitor with acceptable variation in the chromaticity and the color temperature. Operating at the low frequency, the phase-controlled rectifiers can avoid the problems of electromagnetic interference caused by high-frequency switching and adopt low cost power switches. Furthermore, a relatively high power factor can be achieved when the line source voltage varies within a small allowable range.
The research is targeted to a design of a 200 W LED street lamp. To facilitate the changes of the control functions and circuit parameters, the control circuit is realized with a microcontroller. In addition, over-voltage/current protections can be included easily. Experimental results demonstrate that the phase-controlled rectifiers with appropriately designated circuit parameters can approach a power factor of 0.92 and a circuit efficiency of 93% at the rated output.

中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
表目錄 vii
第一章 緒論 1
1-1研究背景與動機 1
1-2論文大綱 6
第二章 單相相位控制整流器之電路架構 7
2-1單相半控轉換器 7
2-1-1工作模式 8
2-1-2控制電路架構 10
2-2 單相對稱相位整流器 12
2-2-1工作模式 13
2-2-2控制電路架構 15
2-3保護機制 16
第三章 漣波對LED發光效率及介面溫度影響 18
3-1漣波對發光效率影響 18
3-2漣波對LED介面溫度影響 22
3-3 LED電流對界面溫度影響 25
第四章 參數設計 26
4-1單相半控轉換器參數設計 26
4-2單相對稱相位整流器參數設計 30
4-3 LED排列方式 33
第五章 相位控制整流器設計與實驗量測 36
5-1相位控制整流器參數設計 36
5-2 實驗量測 37
第六章 結論及未來研究方向 48
6-1 結論 48
6-2 未來研究方向 49
參考文獻 50

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