QuickField

A new approach to field modelling
 Language: Global English Deutch Espanol Francais Italiano Danmark Ceske Chinese Pycckuü

Main >> Applications >> Sample problems >> Repelling of the ring-shaped magnets

# Repelling of the ring-shaped magnets

Two coaxial permanent ring-shaped magnets repel each other.

Problem type:
Axisymmetric problem of magnetostatics

Geometry:

D1 = 2" (50.8 mm) inner diameter of the ring magnet;
D2 = 0.5" (12.7 mm) outer diameter of the ring magnet;
l = 0.75" (19.05 mm) - thickness of the magnet;
δ=0.5" (12.7 mm) - gap between the magnets.

Given:
magnet grade N35, Hc = 954930 A/m, Br = 1.26 T;

Calculate the repelling force between two coaxial ring-shaped permanent magnets.

Solution:
For accurate calculation, the integration contour is drawn in the air around one of the magnet.

Result:
Magnetic field lines and mechanical force calculation

 Repelling force QuickField 160 N Reference* 175 N (38.51 lb, 1 lb = 4.54 N)

* Reference: www.kjmagnetics.com.

• View simulation report in PDF
• Download simulation files (files may be viewed using any QuickField Edition).