permanent magnet pulling force, magnetic flux distribution, magnetic FEA
A simulation of permanent magnet and a steel keeper in the air, performed with QuickField software.
Plane-parallel problem of DC magnetics.
The permanent magnets are made of ALNICO, coercive force is 147218 A/m. The polarizations of the magnets are along vertical axis opposite to each other.
The demagnetization curve for ALNICO:
The B-H curve for the steel:
Find maximum flux density in Y-direction
To avoid the influence of the boundaries while modelling the unbounded problem, we'll enclose the magnet in a rectangular region of air and specify zero Dirichlet boundary condition on its sides.
Flux density in nonlinear permanent magnet:
Maximum flux density in Y-direction: