Abstract:

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 sec- tion. The Maxwell stress betweenmagnet and keeperwas integral analyzed using the finite elementmethod, 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 laterone.Conclusion:This procedure can be used inmagnetic field calculation of cup-yoke-type mag- netic attachments.

Key words: magnetic attachment, finite element method, magnetic field calculation