- 學位論文
智慧型LED電源驅動控制研究
A Study on artifical-intelligent control of power-driven LED
摘要
本研究在探討高亮度LED照明燈具的電源驅動控制技術，使其不受環境溫度變化、燈泡的不同及LED損壞的影響，提高LED照明的可靠度及穩定性。本研究採用定功率的驅動技術，先針對輸入功率150W的高亮度LED照明燈具進行系統識別，並透過實驗分析求得其動態響應的系統模型。然後，進行定功率控制的系統分析，採用PI控制器，並且針對系統不同變數的敏感度函數及符合燈具設計的響應規格，來求得最佳系統的控制參數。 本研究針對一輸入功率150W的LED照明燈具，以PIC微處理器控制，去製作一控制系統，來進行測試。實驗結果顯示，定功率控制系統具強健性，可以抗環境溫度的變化，此外也可以提供LED過載的保護。 本研究另外探討LED的保護電路。LED定功率控制雖然提供了LED良好的照明驅動，但相對的也將使LED在驅動時的風險提高許多。所以另外在控制系統上進行功率的偵測，針對LED損壞，來適時的調控LED燈具的輸入功率，進而達到對LED燈具保護的功能。
並列摘要
The main purpose of this research is to investigate the power-driven control technology of high power LED in order to improve the reliability and stability under different lamp、LED damage and various environmental conditions. System dynamics model for a LED luminare is first identified experimentally. A feedback control system for constant-power driving using PI controller was designed and analyzed. An optimal controller was determined using the closed-loop sensitivity function. For verification purpose, a 150W LED luminare was designed and built. The control system was implemented on a PIC microprocessor. Experimental results show that the control system can stably and accurately control the power at a constant value at 150W±2W at the variation of ambient temperature from -30℃ to 40℃.And the LED lighting variation only 1.7％ at the variation of ambient temperature from 10℃ to 40℃. Another research is to investigate LED protection.Although constant-power control provide LED the better lighting ,make the risk enhanced under driving LED.So carry on the detecting of power in control system for damage to LED .Take advantage of the great change immediately of the power to regulate the operating power and then reach the protection of LED.