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Attraction of the cylindrical magnets

Two coaxial cylindrical permanent magnets are pulled to each other.

Problem type:
Axisymmetric problem of magnetostatics

Geometry:

Two coaxial cylindrical permanent magnets model

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, Hc = 954930 A/m, Br = 1.26 T;

Task:
Calculate the pulling 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:

Two coaxial cylindrical permanent magnets attraction simulation

Pull force

QuickField

164 N

Reference*

153 N (33.77 lb, 1 lb = 4.54 N)

* Reference: www.kjmagnetics.com.

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There are no restrictions applied to the QuickField Student Edition postprocessors.
You can view field maps, make plots, calculate integrals and print pictures in the same way that the Professional Edition users do.