Holding Force In Permanent Magnets
How to determine holding force in permanent magnets.
With the same material and magnet volume different holding forces can be obtained. This becomes possible by different magnetisation or by forming pole pieces. The indicated values apply to hard-ferrite magnets.
Apart from the following examples, valid for only for certain applications, there are many other variants. The indicated values are approximate values and depend on the strength of the iron backing plates, and on the volume of the magnet as well as on the structure of the magnet system. We shall be pleased to assist you in finding the appropriate system or the proper magnetization for your application. The mentionned values have been determined with an isotropic hard ferrite.
Holding Factor 1
Magnetized through thickness.
Holding Factor 1,3
Magnetized through thickness with iron backing plate (Fe).
Holding Factor 3
Alternative poles on one surface..
Holding Factor 3,5
Magnetized through thickness but with iron backing plate (Fe).
Holding Factor 5,8
Magnetized through thickness but in iron U - shape (Fe)
Holding Factor 18
Magnetized through thickness but with two iron pole pieces (Fe)
