钢帽式磁性附着体的二维磁场有限元分析模型的建立

Establishment of Two-dimensional Magnetic Field Finite Element Analysis Model of Cup-yoke-type Magnetic Attachment

目的 :建立钢帽式磁性附着体的二维磁场有限元分析模型 ,实现磁性附着体的优化设计。方法 :钢帽式磁性附着体为轴对称稳定场 ,所以可对其断面的 1/ 2进行二维磁场分析。通过有限元法积分作用于闭路磁体与衔铁之间的麦克斯韦应力 ,算得磁性附着体的固位力。结果 :通过程序计算值与实测固位力值之间的比较 ,发现本程序较真实地反映了磁性附着体各因素变化对固位力的影响趋势 ,而计算值比实测法所得的固位力值小 10 %左右。结论

Objective:The purpose of this study was to establish two-dimensional magnetic field finite element analysis model of cup-yoke-type magnetic attachment for optimizing the design of magnetic attachments.Methods:Because the magnetic field of cup-yoke-type magnetic attachment is stable axial-symmetrical, the authors only analyzed two-dimensional magnetic field of 1/2 section. The Maxwell stress between magnet and keeper was integral analyzed using the finite element method, and the attractive force between magnetic attachments was obtained.Results:Compared the value of calculated attractive force with that of examined, the authors found that the procedure veritably reflected influencing trend of variable factors on attractive force, and the value of former one was 10% less than the later one.Conclusion: This procedure can be used in magnetic field calculation of cup-yoke-type magnetic attachments.