Thermal Flow Field Analysis Of Liquid-Cooled Modules For A Motor Controller

• Main Authors: Jhu, Yuncheng, 朱韻丞
• Other Authors: Chen, Jiannlin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/71367580402562299824

碩士 === 義守大學 === 機械與自動化工程學系 === 100 === This study aims to explore the thermal flow field of liquid-cooled modules for a motor controller. We simulate the main heat source, the Insulate Gate Bipolar Transistors (IGBT), of the motor controller by using the resistance-type heaters in our experiment. Besides, a liquid-cooled system was adopted as the thermal-dissipated equipment. We compared the U-type flow channel and S-type flow channel by the experiment, in which the different watts of heat source for 175W, 350W, 525W, 700W, 875W, 1050W and various flow rates from 3 L/min to 8 L/min were conducted to explore heat dissipated performance and their physical characteristics. Other than that, we applied the numerical simulation technique to analyze and design the better flow channel for heat-dissipation performance. The results reveal that the S-type channel, in which flow inlet and outlet are in the different side, has better heat dissipation performance than the U-type one, in which flow inlet and outlet are in the same side. Apparently, longer flow distance of S-type channel performs better heat dissipation. Moreover, the present result is reliable as the relative deviations between numerical simulation and experiment are less than 10% for both types. In conclusions, the thermal resistance of S-type channel is less than that of the U-type one. Therefore, the thermal efficiency of S-type channel is better than that of U-type one.