Development of ways of modelling of variables magnetic fields on the basis of continuous conducting environments

In present article the approach to calculation and modelling of the stationary and almost stationary magnetic fields, based on transformation of a vortical magnetic field to a potential field is stated. The fact consisting in representation of a contour is put in a basis of a method, formed thin closed токовой by a string, equivalent concerning a magnetic field outside of his double layer of magnetic charges leaning on this contour.