针对电机电磁振动噪声问题,依据电磁振动噪声的基础理论,采用电磁和结构弱耦合的有限元仿真方法,以1台12极72槽车用永磁同步牵引电机为例,分析在不同长宽比、槽口宽度以及结构综合变化的条件下,径向电磁力密度的情况；同时对整个电机进行电磁-结构耦合场分析,研究结构振动位移在不同定子长宽比、槽口宽度以及结构综合变化时的响应情况。综合比较分析两种仿真结果,给出了电磁振动噪声关于定子结构长宽比和槽口宽度的变化规律。最后在额定负载工况下对实物样机进行振动检测和频谱分析,与仿真数值进行对比分析,以验证仿真试验的准确性。

Aiming at the problem of electromagnetic vibration and noise of the motor, based on the basic theories of electromagnetic vibration noise, the finite element simulation method of electromagneticstructural weak coupling was used to analyze the radial electromagnetic force density of a permanent magnet synchronous traction motor with 12 poles and 72 slots under the conditions of different aspect ratios, slot widths and comprehensive changes of both factors. At the same time, electromagneticstructure coupled field analysis was performed on the whole motor to study the structural vibration displacement with the stator aspect ratio, slot width and comprehensive changes of both factors. By comprehensively comparing and analyzing the two simulation results, the variation law of the electromagnetic vibration noise about the aspect ratio and the slot width of the stator structure was given. Finally, the physical prototype was subjected to vibration detection and spectrum analysis under rated load conditions, and the results were compared with simulation values to verify the accuracy of simulation experiments.

TM 302

科技部国家重点研发计划项目(2017YFB0103600)