高性能油冷电机NVH优化研究

Study on NVH Optimization of High-performance Oil Cooled Motor

以一款高性能车用油冷电机为研究对象,对电机的NVH特性进行理论解析、仿真分析及台架摸底测试。仿真分析表明电机的阶次振动结果超标,测试结果进一步对仿真结果进行验证。研究问题产生的主要原因,阐述了问题优化从降低电磁激励和加强壳体结构刚度两个方向。研究表明,电磁方案优化可以降低65%的72阶径向电磁力和85%的转矩波动,壳体加强后可以提升结构对电磁激励的衰减能力。测试结果验证优化方案振动降低10-15 dB,优化后的电机满足NVH性能要求。

Taking a high-performance vehicle oil cooled motor as the research object,the NVH characteristics of the motor were analyzed theoretically,simulated and tested.The vibration results of the simulation analysis motor exceed the standard,and the test results further verify the simulation results.The main causes of the problem were studied and two optimization directions of reducing electromagnetic excitation and strengthening the stiffness of shell structure were expounded.The results show that the electromagnetic optimization scheme can reduce the 72-order radial electromagnetic force by 65%and the torque fluctuation by 85%.The test results verify that the vibration of the optimized scheme is reduced by 10-15 dB,and the NVH performance meets target.