电动汽车牵引用水冷异步电机耦合场分析

基于Ansys多物理场仿真分析平台,对1台车用异步电机进行多物理场耦合分析。仿真电机连续运行在额定工况和峰值工况下的温升和热应力,对电机各部分温度场分布进行深入分析,预测电机峰值工况的最长允许时间。通过热-结构的有限元仿真分析电机内部结构的热应力分布,深入分析转子导条端部与端环焊接位置和机壳与铁心过盈配合面的热应力,校核转子导条端部是否存在开焊的风险,并通过热仿真和应力分析计算机壳与铁心在最高温升工况下不发生滑移或涨开的过盈配合量取值。

Coupled Field Analysis of WaterCooled Induction Motor for Electric Vehicle

Based on Ansys multiphysics simulation platform, a multiphysics coupling analysis of a vehicle asynchronous motor was carried out. The temperature rise and thermal stress of the motor under the rated working conditions and the peak operating conditions were simulated, and the temperature field distribution of each part of the motor was analyzed deeply, and the maximum allowable time of the motor peak condition was predicted. The thermal stress distribution of the internal structure of the rotor was analyzed by finite element simulation of the thermal structure. The thermal stress of the rotor bar and the end ring welding position and the interference surface of the rotor and the core were analyzed. Whether the rotor bar and end ring welding position of the risk of welding, and through the thermal simulation and stress analysis, the value of interference fit that the shell and the core does not occur sliding or rising in the maximum temperature rise conditions.