关键词: 车用电机, 水道参数, 流固耦合, 多目标优化

Abstract: Aiming at the serious problem of temperature rise in the limited space of a permanent magnet synchronous motor for vehicles,the research takes a power 40 kW liquid cooled permanent magnet synchronous motor as an example, establishes a three-dimensional fluid-structure coupling heat transfer model based on reasonable assumptions,and sets up an experimental platform to verify the effectiveness of the model,the article further explores the effects of structural parameters such as the width and corner radius at the bending sections of the axial water channel on the winding end maximum temperature,inlet and outlet pressure difference and the maximum flow rate of the channel,and combines the multi-objective optimization algorithm to optimize the key parameters of the proposed water channel. The results show that the heat dissipation performance and the flow resistance of the channel are significantly improved compared with the initial scheme, providing reference for enhancing the overall performance of vehicle motors cooling waterway.

Key words: electric vehicle motor,waterway parameters,fluid-structure interaction,multi-objective optimization