集成驱动式结构的永磁同步电机振动噪声特性

Noise and Vibration Performance of Permanent Magnet Synchronous Motor for Pure Electric Vehicle Integrated Drive System

摘要:

以电机减速器集成化的电动车动力总成为研究对象，建立了动力总成有限元模型，并对比了有无减速器结构时的电机模态.分析了电动车动力总成振动噪声的产生机理，综合考虑齿轮动态啮合激励以及电机电磁激励，对动力总成进行动态响应数值仿真分析.通过频域分析研究了系统的振动噪声特性，得到了集成化结构对电机动态特性的影响.对动力总成进行声振试验，验证了理论与仿真分析所得结论的正确性.结果表明：集成减速器后，电机的模态和振动噪声特性均会发生变化.

Abstract:

Based on the dynamic finite element model of electric powertrain, modal analysis was implemented with and without a reducer. After analyzing the mechanism of vibration and noise of the powertrain, dynamic responses of the reducer was calculated by numerical simulation method, which takes the internal dynamic excitation of gears and electromagnetic excitation into consideration. The effects of integrated structure on motor dynamic characteristics were obtained by using frequency domain analysis upon the motor vibration and noise. Finally, an experimental bench was used to test the vibration acceleration and radiation noise of the powertrain in semi anechoic room, verifying conclusions reached by theoretical analysis. The results show that the modes and the performance of noise, vibration and harshness(NVH) have changed after integrating with the reducer.