Attraction of the block magnet to the steel plate - QuickField simulation example
Rectangular prism shaped permanent magnet is pulled toward the ferromagnetic plate.
How to find pulling force of permanent magnets to steel plates?
Answer Typical applications Geometry
w=1.5" (38.1 mm) - magnet width; Given Task Solution Result
* Reference: www.kjmagnetics.com.
Engineering question
Set up a plane-parallel QuickField DC Magnetics problem for a permanent magnet and steel plate system and evaluate pulling force from computed field results.
permanent magnet fixtures, magnetic holding devices, magnet mounting assemblies
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Simulation problem
Problem Type
Plane-parallel problem of DC magnetics
t=0.25" (6.35 mm) - magnet thickness;
L=0.25" (6.35 mm) - magnet length;
d=0.25" (6.35 mm) - plate thickness;
magnet grade N35, Hc = 954930 A/m, Br = 1.26 T;
relative magnetic permeability of the plate μsteel = 1000.
Calculate the pulling force of the magnet attraction to the steel plate.
To calculate the pulling force accurately, and avoid integration along the edge dividing media with large difference in magnetic permeabilities, we place the magnet at a small distance δ = 0.005" (0.127 mm) from the steel plate. Integration contour is drawn in the air around the magnet.
Magnetic field of the brick permanent magnet in vicinity of the steel wall.
Pull force
QuickField
74 N
Reference*
65 N (14.3 lb, 1 lb = 4.54 N)
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