Repelling of the cylindrical magnets

QuickField simulation example

Two coaxial cylindrical permanent magnets repel one another.

Problem Type
Axisymmetric problem of magnetostatics

Geometry

D = 2" (50.8 mm) - magnet diameter;
L = 0.65" (16.51 mm) - magnet thickness;
δ=0.5" (12.7 mm) - gap between the magnets;

Given
magnet grade N35, H_c = 909 kA/m, B_r = 1.21 T.

Task
Calculate the repelling force between two coaxial cylindrical magnets.

Solution
To calculate the correct result an integration contour is drawn in the air around one of the magnets.

Result
Magnetic field lines and mechanical force calculation

* Reference: www.kjmagnetics.com.

• Video: Repelling of the cylindrical magnets. Watch on YouTube
  .
• View simulation report in PDF.
• Download simulation files (files may be viewed using any QuickField Edition).