Alternators with inductor or protruding pole rotor are made by a polar core attached to the surface of a flywheel made of cast steel. Each core is wrapped in a coil inserted in its upper part by a polar shoe containing essentially what we call polar parts. The coils https://www.mrosupply.com/lubrication/lubrication-accessories/2310406_8078-j_alemite/ are connected in series and have their terminals fixed to the collector rings, separated and attached to the axis of the inductor. These rings cause their excitation to occur through a direct current source. The coils are connected alternately generating the north and south poles on the pole pieces. The poles generated are in even numbers all the time.
The stator is composed of a fixed ring where the coils that integrate the armature winding are installed. This ring is formed by a stack of silicon steel sheets separated from each other and forming a solid block when pressed. The coils forming the winding are introduced into buttresses or channels which are allowed to be closed or open located on the inner periphery of the so-called stator ring.