To master heat transfer characteristics of locomotive IGBT power module cooler

experimental system on the heat dissipation

substrate temperature range and the effects of air velocity and inlet air temperature on the heat transfer of the heat pipe cooler is built. The experiments are conducted under air velocity at 5-7m/s

inlet air temperature at 30-45℃ and substrate temperature at 70-80℃. Experimental results show that the higher the substrate temperature is

the more heat is dissipated; when the substrate temperature is at 80℃

the heat dissipating capacity is 5400-7400W. The results also show that the optimal working temperature of substrate is at 70-90℃for the cooler. Inlet air temperature has more effects on the heat transfer than air velocity. Considering energy consumption and noise level of

the air velocity flowing through the cooler should not be more than 7m/s. Experimental results provide a scientific basis for the selection and design of the cooler.