摘要
轮毂电机为电动汽车动力驱动系统核心部件,其质量和振动噪声水平严重影响整车可靠性、经济性与舒适性。本文以某轮毂电机为研究对象,对电机壳体进行拓扑优化,在轻量化壳体的同时进一步改善电机振动水平。首先计算电机在某分析工况下磁场分布和定子齿表面电磁力,并把电机磁场节点力映射到电机结构模型,利用模态叠加法求解电机壳体表面振动响应;其次对电机壳体表面振动响应进行分析,确定最大振动响应位置和相应的优化部件;最后以最小柔度为目标对该部件进行拓扑优化,并对优化方案进行仿真验证。实验结果表明,轻量化后电机壳体提升了固有频率,同时在分析工况下振动响应在全频段有明显改善,为该型轮毂电机轻量化设计和振动噪声改善提供了技术参考。
Hub motor is the core component of the power drive system of electric vehicles. Its quality and vibration and noise level seriously affect the reliability,economy and comfort of the whole vehicle. In this paper,a hub motor is taken as the research object,and the motor shell is topologically optimized to further improve the vibration level of the motor while weighing the shell.Firstly,the magnetic field distribution and the electromagnetic force on the stator tooth surface of the motor under a certain analysis condition are calculated,and the magnetic field node forces of the motor are mapped to the structural model of the motor,and the vibration response of the motor shell surface is solved by the modal superposition method. Secondly,the vibration response of motor shell surface is analyzed to determine the maximum vibration response position and the corresponding optimization components. Finally,the topology optimization of the component is carried out with the aim of minimum flexibility,and the optimization scheme is simulated and verified. The experimental results show that the natural frequency of the motor shell is increased after the lightening,and the vibration response in the full frequency band is significantly improved under the analysis condition,which provides a technical reference for the lightweight design of the wheel hub motor and the improvement of vibration noise.
作者
侯俊剑
张玉琦
房占鹏
何文斌
HOU Jun-jian;ZHANG Yu-qi;FANG Zhan-peng;HE Wen-bin(Mechanical and Electrical Engineering Institute,Zhengzhou University of Light Industry,He'nan Zhengzhou 450000,China;He'nan Engineering Research Center of New Energy Vehicle Lightweight Design and Manufacturing,He*nan Zhengzhou 450000,China)
出处
《机械设计与制造》
北大核心
2023年第1期86-90,共5页
Machinery Design & Manufacture
基金
国家自然科学基金(51505433,51805491)
河南省高等学校重点科研项目(20IRTSTHN015)。
关键词
轮毂电机
振动噪声
轻量化
拓扑优化
Hub Motor
Vibration Noise
Lightweight
Topology Optimization
