The single-phase winding is the name given to the coils and they are the ones that give the magnetic field used for the transfer of energy. Considering a winding, fed by a current ‘ai’, a magnetomotive form (FFM) distributed in the space under a pole in the ladder curve, field of interest, is obtained, then the same curve repeats for the other poles, changing the sense of the magnetic field, that is, negative poles alternate with positive poles. The stator is composed of double windings, one main and one auxiliary 7.5 hp 213T motors. This double-winding single-phase electric motor is energized when the rotor reaches its maximum acceleration capacity and then the starter winding switches off and only the working coils stay active.
In three-phase winding, the stator of both the synchronous and the asynchronous machine can be made of a three-phase winding, which is generally symmetrical, the three being identical, with respect to the distribution and the number of turns. The winding magnetic axes are offset by 120 degrees electrical in space, where by chance the concentrated and full-pitch windings are shown in an electric motor with two poles.