Browse Publications Technical Papers 2019-01-0905

Study on the Heat Dissipation Effect of Automobile Motor Based on Heat Pipe 2019-01-0905

At present, motors are the main source of power for new energy vehicles. The heat of the motor during operation is mainly generated by the stator windings. In the conventional motor, the heat generated by the stator winding is transmitted to the motor casing through the stator core, the cooling water jacket is distributed on the motor casing, and the heat is taken away by the coolant in the water jacket. In this heat dissipation mode, the heat dissipation system consumes a higher amount of power during the heat dissipation process. In this paper, we improve the traditional automobile motor, based on excellent heat transfer performance of heat pipes. The heat of the stator winding is directly transmitted to the motor casing through the heat pipe, then the heat is taken away by the coolant in the water jacket. In order to study the heat dissipation effect of the improved system, we constructed the heat transfer model of the motor winding to the wall surface. According to the internal structure and working principle of the automobile motor, and the heat transfer characteristics of the heat pipe, we used the model to analyze the factors affecting the heat dissipation effect of the motor under different layouts. Finally, based on the model and test results, determine the optimal layout of the system. Research shows the heat dissipation effect is optimal, when the heat pipe and the stator winding are arranged in the same surrounding manner. The temperature of the stator winding part of the motor can be reduced by 15.3 °C. It shows that the system that uses the heat pipe to improve the motor of the automobile can effectively reduce the energy consumption required for the heat dissipation of the motor. This study can provide a new design method for automotive motor cooling.


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