Calculation improvement of 3D linear magnetostatic field based on fictitious magnetic surface charge

This paper presents a mathematical model for calculating 3D linear magnetostatic fields with open boundaries. By using this improved method (based on the integral equations and magnetic surface charge), several field computation problems inside magnetic materials are avoided. A comprehensive procedure is established for magnetic field computation within free space and iron, as well as on their boundary at a reduced computational cost. The proposed method was compared to the analytical solution for a test case.