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Main >> Applications >> Sample problems >> Ferromagnetic C-magnet simulation

Ferromagnetic C-magnet

QuickField simulation example

A permanent C-magnet in the air. The example demonstrates how to model curved permanent magnet using the equivalent surface currents.

Problem Type
Plane-parallel problem of DC magnetics.

Geometry of the magnet:
Ferromagnetic C-magnet The example demonstrates how to model curved permanent magnet using the equivalent surface currents 1 cm 3 cm 7.5 cm

Given
Relative permeability of the air μ = 1;
Relative permeability of the magnet μ = 1000;
Coercive force of the magnet Hc = 10000 A/m.
The magnet polarization is along its curvature.

Solution
To avoid the influence of the boundaries while modeling the unbounded problem, we'll enclose the magnet in a rectangular region of air and specify zero Dirichlet boundary condition on its sides.
Magnetization of straight parts of the magnet is specified in terms of coercive force vector. Effective surface currents simulate magnetization in the middle curved part of the magnet.

Results
Flux density in ferromagnetic C-magnet:
Flux density in ferromagnetic C-magnet