Analysis of magnetomotive force of single-phase and three-phase windings of rotating electric machines

Analysis of magnetomotive force of concentrated and distributed single-phase and three-phase windings was performed using momentary graphical images of magnetomotive force functions of considered windings, which vary in time and in space, which are formed at most acceptable moment of time, when maximal current flows in single-phase windings, and phase U current in three-phase windings equals zero. These images, as periodical functions, are described by Fourier sequences. General analytical expressions of pulsating and rotating magnetic fields were received, which can be applied when investigating magnetomotive force created by single-phase and three-phase windings.