Page 30 - 《应用声学》2019年第6期

第 38 卷 第 6 期 Vol. 38, No. 6
2019 年 11 月 Journal of Applied Acoustics November, 2019

⋄ 研究报告 ⋄

基于电磁力近似算法的驱动电机NVH

快速仿真方法

邓清鹏 1† 卢 彬 1 王 涛 1 刘卫国 1 邓承浩 1 周安健 1
任 勇 2 肖贺平 1

(1 重庆长安新能源汽车科技有限公司动力开发部 重庆 401120)
(2 长安福特马自达发动机有限公司 南京 211100)
摘要 电动汽车驱动电机产生的电磁噪声是汽车 NVH 关注的重点问题，对其进行全转速段多工况 NVH 仿真
通常需要耗费大量时间和计算资源。该文通过有限单元分析揭示了电机气隙电磁力随转速变化的规律，并根
据这一规律提出了基于外特性曲线的电磁力时间缩放及插值的近似算法。文章采用电磁力到结构网格的映射
算法对结构振动有限元模型进行激励力加载，使用声场有限元方法计算电机的辐射噪声，最终实现了车用驱
动电机的电磁振动及噪声的快速仿真。使用该方法对车用电机进行全转速段振动噪声仿真，可大大压缩多工
况电磁场有限元分析所需的计算时间，提升仿真效率。
关键词 驱动电机，NVH 仿真，电磁力插值，电磁噪声
中图法分类号: TB535 文献标识码: A 文章编号: 1000-310X(2019)06-0932-07
DOI: 10.11684/j.issn.1000-310X.2019.06.004

A high efficiency NVH simulation methodology for vehicle driving motor based
on electromagnetic force approximation

DENG Qingpeng 1 LU Bin 1 WANG Tao 1 LIU Weiguo 1 DENG Chenghao 1 ZHOU Anjian 1
REN Yong 2 XIAO Heping 1

(1 Chongqing Chang’an New Energy Automobile Technology Co. Ltd., Chongqing 401120, China)
(2 Chang’an Ford Mazda Engine Co. Ltd., Nanjing 211100, China)

Abstract Electromagnetic noise generated from the driving motor used in electrical vehicle is an important
topic in the research field of noise, vibration, and harshness(NVH), whose simulation for multiple operating
conditions over the full speed range needs a large amount of time and computational resources. In this paper,
the dependence of the air gap electromagnetic forces on the motor rotation speed is revealed by means of
electromagnetic finite element analysis. Based on the force-speed relation, force scaling and force interpolation
algorithms are proposed to approximately calculate the electromagnetic forces for different operation conditions
on the external characteristic curve. A force mapping algorithm is presented to apply electromagnetic forces
to the structural finite model, and acoustic finite element analysis is used to calculate electromagnetic noise
radiated from the motor. The presented NVH simulation methodology can significantly reduce computation
time consumed in multiple operation conditions, and observably improve simulation efficiency.
Key words Driving motor, NVH simulation, Electromagnetic force interpolation, Electromagnetic noise

2019-01-29 收稿; 2019-05-07 定稿
作者简介: 邓清鹏 (1987- ), 男, 湖南邵阳人, 博士, 研究方向: 振动噪声控制, 汽车 NVH。
† 通讯作者 E-mail: dqp_2017@163.com