Modeling the Field Inside a Soft-Magnetic Boundary Using Surface Charge Modeling

Recent advances have been made into modeling the soft-magnetic materials using the surface charge model. Until now, the model has only been used to model the field outside the soft-magnetic material. To include the saturation in the future, the magnetic field inside the material should be known. In this paper, the model is used to calculate the field inside the material when three different shapes of boundaries are considered. Comparing the results with Finite Element Method shows that the differences in the air region are <;1 mT and those in the soft-magnetic region are <;4 mT. Larger discrepancies can, however, occur near the corner of the material.