Magnetic stress and support plate deflection of halbach array magnets

The Halbach array of permanent magnets has an advantage of increasing the magnetic field, but it produces significant internal stress inside the PM array on the other hand. The paper deals with the magnetic analysis of the PMs and the mechanical analysis of the support plates to fix the PM array. The deflection analysis of the support plates is made in two different ways to confirm the validity of analysis, an analytical approach and a finite difference method. In order to establish a maximum deflection of the plate below 1mm, some materials for the support plate are considered to compare the deflection and the necessary plate thickness.