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

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