2-D calculations of magnetic field diffusion in the task "loop above the armature"

Summary form only given. The paper describes a technique to calculate the diffusional losses of magnetic flux in the helical generator in a two-dimensional approximation. The equations for vector potential, that describe the distribution of magnetic flux and of the current density in the loops of the coil and of the central armature, are presented. The computation code is given, as well as the results of computations of the vector potential and of the current density.