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.
How can a curved permanent magnet be represented when its magnetization follows the curvature?
Answer Typical applications Geometry
Given
Solution
Results
Engineering question
Specify coercive-force vectors in the straight sections and use equivalent surface currents to represent magnetization in the curved section.
C-shaped magnetic cores, horseshoe magnets, open magnetic circuits
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Simulation problem
Problem Type
Plane-parallel problem of DC magnetics.
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.
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.
Flux density in ferromagnetic C-magnet:
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