A mathematical model is developed to calculate the electromagnetic field in the cross section of the SRM. To implement the mathematical model was used the software package ELCUT-5.1. Two-dimensional boundary-value problem relative to the magnetic vector potential was solved by the finite element method and Newton-Raphson. Calculations of the characteristics of the electromagnetic field, static and dynamic torques, as well as the dependence of self-induction of the angle of rotation of the rotor. On the basis of computer models computer simulations that helped to explore the steady-state mode of operation of SRM-15/4000.