新能源汽车用轮边驱动电动机转子模态分析

Modal Analysis of In-wheel Motor Rotor for New Energy Vehicles

新能源车用轮边驱动电动机为轴向磁通结构,其转子结构复杂,转子中部圆周尺寸大,工作时易产生较大离心力,为避免电动机转子失效,需在设计时对其结构进行建模及模态分析。利用UG对转子各零部件建模,添加各零部件间约束完成装配;将建立好的电动机转子模型导入ANSYS Workbench中对其进行网格划分、模态分析求解,得出该转子前六阶固有频率及各阶对应的振型云图,为转子结构设计提供依据。

In-wheel electric motor for new energy vehicles is an axial magnetic flux structure.The rotor structure is complex,the circumference of the rotor is large,and it is easy to generate large centrifugal force during operation.In order to avoid motor rotor failure,it is necessary to model its structure and perform modal analysis when designing.UG is used to build models of each component part of the rotor,and add constraints between these components to complete the assembly.The established motor rotor model is imported into ANSYS Workbench for meshing and modal analysis.The first six natural frequencies of the rotor and the corresponding mode shape of the rotor are obtained,which provides the basis for the rotor structure design.