- 學位論文
網路伺服器高功率電源供應器之散熱研究
Heat Dissipation for High Power Supply of Network Servers
摘要
高功率直流電源供應器是將交流電轉換為直流電，為一般網路伺服器設備不可或缺的電能，又電路結構的不同又可分為有線性（LPS）、交換式（SPS）兩種。其中交換式電源供應器產品較為輕薄短小及輸出穩定，因此業界網路伺服器設備多屬於使用此設計，本文以1600W-12V 輸出規格的伺服器專用交換式電源供應器（Server SPS）的散熱研究與分析為對象。 本文是以FLOTHERM程式建構1600W 交換式電源供應器數值模擬分析，來做為整體電源供應器散熱片之設計分析，並將模擬結果與實測結果做比對，確認模型的準確性，再進一步分析模型流場與溫度場，並且針對其散熱設計需改善之處做研究分析。改善電源供應器的散熱系統同時兼顧成本與可行性前提下，在其有限空間中做多種散熱片設計的改善探討、改善風流路徑、機殼側邊開孔、利用導熱板熱傳導到機殼六種改善方案。經過模擬比較結果，高功率電源供應器最重要的橋式整流器(BD1=Bridges) 、二極體(Q2)及電晶體(D2) 溫度明顯下降改善11.5%，對於整個電源供應器的穩定性與可靠度大大的提升。
並列摘要
High capacity power supply transforms AC to DC current, and is an essential part of network servers. There are mainly two types of high power supply such as LPS and SPS, due to the difference in the constructions. In comparison SPS is thinner and smaller and has more stable output, and is therefore commonly used in internet servers. The heat dissipation problem of a SPS high power supply of 1600W-12V output was analyzed in this thesis. Flotherm program was used to construct the simulation model of the 1600W power supply. The overall power supply heat sink design was analyzed. The computed results were compared to the actual testing for verification of the simulation. Further simulation of air flow and temperature distribution was carried out to study the enhancement of heat dissipation for the power supply, with cost and space consideration. Heat dissipation enhancement was investigated by varying the shape of heat sink, air flow path, openings at the case, conduction to server case, etc. The results show that the temperature at the essential components such as (BD1=Bridges), (Q2) and (D2) can decrease by 11.5%. The stability and reliability of power supply can be improved at the same time.