The rotor can obtain two or more windings, although they are always even number and all connected in series, considering that each winding becomes responsible for the production of one of the poles of the electromagnet. In some synchronous motors, the rotor may consist of a permanent magnet in place of an electromagnet, in this case being called a permanent magnet synchronous machine. The stator, also known as armature, consists of the fixed part of the machine, designed around the rotor so that it rotates inside it, which is constituted by a package of blades of a ferromagnetic material wrapped in a set of windings, properly distributed around its circumference and positioned in grooves.
The stator windings are fed by means of a three-phase alternating voltage system. Throughout the stator AOM3543 circulates all the electric energy produced, both the voltage and the electric current that circulate, are considerably high in relation to the rotor, whose objective is only to produce a magnetic field to excite the machine so that it is feasible to induction of voltage at the terminals of the stator windings.