Stator
The stator is the stationary outside part of a motor.
The stator of a permanent magnet dc motor is composed of two or more permanent magnet pole pieces.
The magnetic field can alternatively be created by an electromagnet. In this case, a DC coil (field winding) is wound around a magnetic material that forms part of the stator.
Rotor
The rotor is the inner part which rotates.
The rotor is composed of windings (called armature windings) which are connected to the external circuit through a mechanical commutator.
Both stator and rotor are made of ferromagnetic materials. The two are separated by air-gap.
Winding
A winding is made up of series or parallel connection of coils.
Armature winding – The winding through which the voltage is applied or induced.
Field winding – The winding through which a current is passed to produce flux (for the electromagnet)
Windings are usually made of copper.
