摘要
护套厚度和过盈量是影响表贴式高速永磁电机转子强度的主要因素。通过分析永磁转子的受力情况,把三维永磁电机转子的强度模型简化为平面应力问题,在极坐标下推导出考虑护套厚度、过盈量及转速影响的碳纤维护套永磁转子应力解析解。将永磁体和转子铁心接触面间的接触压强及碳纤维护套的最大环向应力作为优化目标,以永磁体和护套的应力极限强度为约束条件,选择碳纤维护套厚度以及永磁体与碳纤维护套之间的静态过盈量作为设计变量,通过多维可视化算法计算求解找到满足条件要求的护套厚度及静态过盈量的优解范围。通过有限元法和解析法的计算结果对比来验证转子的应力分布情况。仿真结果表明,所设计的转子护套能够满足高速下永磁体的强度保护要求,能够实现为高速永磁电机转子表面安装碳纤维护套的优化设计。
The sleeve thickness and interference are the main factors affecting the rotor strength of surface-mounted high-speed permanent magnet motor(SHPMM).By analyzing the force situation of the permanent magnet rotor,the strength model of a three-dimensional permanent magnetic motors'rotor was simplified into a plane stress problem,and a stress analytical solution for the carbon-fiber sleeve permanent magnet motors'rotor,which took into account the effects of the sleeve thickness,the interference and rotational speed was deduced in a polar coordinate.On the basis of the above conditions,the pressure between the contact surfaces of the permanent magnet and the rotor core,the maximum hoop stress of the carbon fiber sleeve were taken as the optimization objectives,the stress limit strength of the permanent magnet and the sleeve were taken as the constraints,and the thickness of the carbon fiber sleeve and the static interference between the permanent magnet and the carbon fiber sleeve were chosen as the design variables.Then the optimal solution range of the sleeve thickness and static interference that meets the conditions was found by the multi-dimensional visualization algorithm.The stress distribution of the rotor was verified by comparing the computational results of the finite element method and the analytical method.Simulation results show that the rotor sleeve designed can meet the strength protection requirements of permanent magnets at high speeds,and can realize the optimal design of carbon fiber sleeve installed on the rotor surface of SHPMM.
作者
李美敏
彭元修
陈亮亮
林梦寒
LI Meimin;PENG Yuanxiu;CHEN Liangliang;LIN Menghan(College of Information Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《微特电机》
2024年第9期23-29,共7页
Small & Special Electrical Machines
关键词
表贴式高速永磁电机
有限元仿真
转子强度分析
多维可视化
碳纤维护套
surface-mounted high-speed permanent magnet motor(SHPMM)
finite element simulation
rotor strength analysis
multi-dimensional visualization
carbon fiber sleeve
