电动汽车三合一驱动系统振动噪声分析与优化

NVH Analysis and Optimization of Electric Vehicle Triad Drive System

为改善电动汽车三合一驱动系统中电机控制器的运行环境和总成的振动噪声,在总成振动噪声特性试验的基础上,通过工况传递路径分析提出控制器隔振的优化措施。首先,通过电磁力仿真和阶次跟踪定理分析总成中永磁同步电机和减速器的振动噪声特性;然后,结合工况传递路径的分析方法,确定三合一驱动系统中电机控制器主要振动激励源及其传递路径,并提出增加双层隔振系统的优化方案;最后,对隔振前、后的驱动总成进行振动噪声测试。测试结果表明,电机控制器隔振方案对控制器工作环境和总成振动噪声性能的改善效果良好。

In order to improve the operation environment of motor controller and NVH in electric vehicle triad drive system,the optimization measures are proposed to isolate the vibration for controller based on operational transfer path analysis and system NVH characteristic tests.Firstly,the NVH characteristics of PMSM and reducer in the system are analyzed with electromagnetic simulation and order tracking theorem;Combined with the operational transfer path analysis,the main vibration stimulus source of the controller and its transfer path in triad drive system are identified,and the optimization measures are proposed to add double-stage vibration isolation system;Finally,the drive system NVH is tested before and after optimization.The results show that the vibration isolation measures are effective in improving the working environment of the controller and the system NVH performance.