The electromagnetism (EM) software solves the Maxwell equations in the eddy current (induction–diffusion) approximation. This is suitable for cases where the propagation of electromagnetic waves in air (or vacuum) can be considered as instantaneous. Therefore, the wave propagation is not solved. The main applications are magnetic metal forming, welding and induced heating.
The EM software module introduces electrical current into solid conductors and computes the associated magnetic field, electric field and induced currents. The EM solver is coupled with the structural mechanics solver (the Lorentz forces are added to the mechanics equations of motion) and the structural thermal solver (the ohmic heating is added to the thermal solver as an extra source of heat). The electromagnetic fields are solved using a finite element method for the conductors and a boundary element method for the surrounding air/insulators, making an air mesh unnecessary.