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  • 學位論文

高功因色溫可調式LED驅動電路之研製

Color Temperature Adjustable LED drive circuit with High Power Factor

指導教授 : 陳慎銚
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摘要


本論文研製之針對色溫照明設備,提出一種驅動及控制兼具的電路架構。該架構是由返馳式PFC轉換器、PWM控制電路及LED色溫模組所組成的,主要提高了功因及效率。LED為一種電流控制元件,這裡使用升壓型轉換器作為LED色溫模組的驅動電路,以電流模式控制提供其所需穩定的電流源;並以微控制器輸出PWM訊號來控制驅動電路,進而改變通過LED的平均順向電流,來達到可改變色溫的功能。

並列摘要


In this thesis, for adjustable color temperature of lighting equipment, both a drive and control circuit architecture. The architecture is composed by the flyback PFC converter, PWM control circuit and LED color temperature module, to improve the power factor and efficiency. LED is a current control element. In this thesis used the boost converter module drive circuit as LED color temperature, current mode control to provide the desired stable current source; and the microcontroller output PWM signal to control the drive circuit, thereby changing the average forward current through the LED, to change the color temperature function.

參考文獻


[1] 李昶毅,2012,“可調光T5 LED燈具驅動控制電路之研製”,國立虎尾科技大學光電與材料科技研究所碩士論文。
[2] 黃建豪,2009,“高亮度LED之驅動電路研製”,國立成功大學電力電子產業研發碩士專班碩士論文。
[8] Daniel W.Hart,2011,Power Electronics,美商麥格羅.希爾國際股份有限公司,台北市。
[12] MRO-TEK Ltd,2004,”HIGH-FREQUENCY POWER TRANSFORMERS”。
[13] TDK,”Ferrite for Switching Power Supplies Original cores PQ/LP/EPC/EP series”

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