In applications that involve magnetizable media and moving bodies, the integral methods used for electromagnetic field computation have some major advantages in comparison with the differential methods. Polarization fixed point method allows the use of the eddy current integral formulation for computation of 3D electromagnetic field in nonlinear media. The integral equation numerical solution is obtained employing Galerkin procedures and using first order edge elements. By imposing the topological gauge condition the active unknowns are associated only with the cotree edges. A polyhedral mesh is used to discretize the polarization field. For the field of the current density a different discretization mesh can be employed. In domains with moving bodies only magnetizable and conductive media are discretized, their meshes remains unchanged and only the free term is reevaluated at each time step.

Keywords: Integral formulation for 3D eddy current problems, Nonlinear media, moving bodies, Polarization fixed point method