The magnetic core is charged with raising the magnetic flux of the field caused by the coils and thereby forming electromagnets at its poles. In direct current electric motors, these poles are fixed, as in alternating current motors the field generated is the rotating field.
The stator is designed with several thin blades of magnetic material, pressed to construct the stator assembly. The magnetic materials of the motor cores must have high saturation induction, allowing the motor to work at a high magnetic flux point, always below the saturation point.
The space designated for the coils is called a groove, and the structures that will constitute the poles themselves are the teeth. In the stator winding, copper coils are wound around the stator teeth, and these windings are three-phase or single-phase induction motors.
The coils are separated from each other through a varnish layer, insulated from the groove, fastened with an insulated string, and again covered with an additional layer of varnish. They are installed in such a way that the ligature of the three phases can be completed in star, triangle or other tensions.