MR16-LED燈具在市售產品中皆以鰭片方式進行被動式散熱，受限於MR16規格之體積限制，當亮度欲往上提升，被動式之傳熱方式就會遇到散熱的瓶頸，因此就必須有別以往的被動式散熱，而走向主動式散熱。本文研究高功率MR16 LED燈具，主要結構設計為COB LED模組搭配散熱鰭片、燈杯及燈座，依熱轉換方程式評估及選用最佳風扇型式，藉由風扇提高空氣對流係數進行主動式散熱。利用光學模擬軟體針對透鏡之曲率半徑設計，進行照度及場型模擬，分析最佳曲率半徑之透鏡，並觀察在此曲率半徑設計於不同照射距離下的照度變化，模擬數據顯示照度值在CNS規範下，可應用於檯燈使用於製圖及閱讀場合或當做廁所、走廊、樓梯、休息室等場所的照明燈具。完成整體燈具結構設計進行溫度量測，觀察改變驅動COB LED功率、風扇功率的溫度變化，及模擬實際使用狀況進行光通量及照度量測，實驗結果顯示設計之燈具隨著驅動LED功率逐漸增加，各量測位置點的溫度也隨著增加，當驅動LED功率達到原產品之額定功率兩倍時，散熱結構還是能將LED所產生的熱量逐漸帶出，持續的與環境空氣進行熱交換，而使LED正常運作且各量測溫度點達穩定狀態。實際量測光通量之數值顯示，設計之最佳透鏡曲率參數使出光率達90%。照度量測值與光學模擬數值誤差為10%左右，可得光學模擬在此分析上的可行性及可靠性。根據上述針對MR16 LED燈具之散熱設計、透鏡設計進行的探討分析，可做為未來實際應用時之參考及改良。

In the conventional MR16 lamps market, there are almost passive heat dissipation by heat sink. However, restricted by the standard volume of MR16, when the power increases, the traditional heat dissipation way doesn’t meet the requirement. That is, the heat transfer hits the bottleneck. Therefore, there must have a different way of heat dissipation by the past, and the active heat dissipation is proposed. This paper studied the high power MR16 LED lamps, the main structural design is COB LED module with heat sinks according to heat transfer equation and a well-designed fan. The best designed fan is utilized to enhance convection coefficient by active heat transfer. By using optical simulation software to design the curvature of lens and analyze the luminances at different distances under this curvature. The simulation data show that the luminance under CNS standard is used as luminance lamp and widely applied in many places such as studio, library, restroom ...etc. After completing the whole structural design, measured the temperature with varying the power of COB LED and fan. Besides, simulated the luminous flux and lumination under practical usage. The result indicates that the temperature increases with enhancing the power of LED. When the power of LED is double, the heat is transferred by the heat structure. Therefore, the LED can perform normally under this stable condition. The practical measurement of luminous flux indicates that the extraction rate under the best design curvature of lens is 90%, and the errors between the measurement of luminous flux and the optical simulation is about 10%, this shows that the analysis of optical simulation is practicable and reliable. According to the above discussion about heat transfer structure design of MR16 LED lamps and lens design, these can be applied to practical uses in the future.

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