本論文探討converter中絕緣閘雙極電晶體(Insulated Gate Bipolar Transistor, IGBT)的熱管理，因為IGBT長期處於高電壓工作環境，高溫使其壽命減短影響Converter系統運作。相變化材料(Phase Change Material, PCM)是一種當進行相轉變時會吸收/釋放大量熱能的材料，將它用於散熱有很大的幫助，本論文針對不同濃度石蠟/奈米石墨片來探討其熱物理性質，利用DSC研究PCM複合材料的潛熱值與熔點，SEM照片看出奈米石墨片在石蠟中的分布情況，固定功率實驗可以看出PCM複合材料的加熱性質，而熔滴點實驗可以測得PCM複合材料的形狀穩定性，最後將裝有PCM複合材料的鰭片裝至15kW converter運作，實驗結果有添加奈米石墨片的鰭片溫度較低。 本論文另外設計不同數量散熱鰭片，並用模擬軟體COMSOL進行模擬，與實驗測量溫度比較，進行熱管理分析。 ;This study reports the development and the thermal investigation of the performance of straight finned heat sink filled with paraffin / graphite nanoplatelets (GNPs) composite phase change material (PCM) for thermal management of insulated gate bipolar transistors (IGBT). The heat sink made of aluminum has a cavity where the composite PCM is stored. GNPs acts as an effective media of thermal conductivity enhancement (TCE), primarily aims to increase the thermal conductivity of paraffin. Differential scanning calorimeter (DSC) tests was done to investigate thermal properties which include melting and solidification temperatures and latent heats.
