Hongsheng YANG, Guomeng SONG, Xiong WANG. Research on Effect of Air Gap between IGBT Module and Heatsink on Thermal Performance[J]. Electric Drive for Locomotives, 2020,(1):18-21,33.
Hongsheng YANG, Guomeng SONG, Xiong WANG. Research on Effect of Air Gap between IGBT Module and Heatsink on Thermal Performance[J]. Electric Drive for Locomotives, 2020,(1):18-21,33. DOI: 10.13890/j.issn.1000-128x.2020.01.004.
Thermal grease is used to reduce the contact resistance of the contact interface between the IGBT module and the heatsink in the field of rail transit. Because of the frequent vibration and the cyclic temperature fluctuation of the IGBT module, the thermal grease could volatilize, flow out, and even dry up, which could cause an air gap between the module and the heatsink, heat transfer conditions was worsen. The effect of the air gap on the temperature of the IGBT junction and the shell has been studied based on numerical simulation and experiment. The results showed that the air gap has less influence on the junction temperature in the intial stage, with the expansion of the air gap, the junction temperature increase obviously and lead to the declining of the life of the IGBT module, and even IGBT module rapidly damage.
关键词
IGBT模块散热器气隙IGBT壳温IGBT结温数值仿真
Keywords
IGBT moduleheatsinkair gapcase temperature of IGBTjunction temperature of IGBT
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