1. Stator: This is the stationary part of the motor, containing the magnetic field. It usually consists of a set of electromagnets or permanent magnets that create a magnetic field.

2. Rotor: This is the rotating part of the motor, which interacts with the magnetic field created by the stator. It typically has windings or a conductive material that allows current to flow through it.

3. Commutator (or slip rings): This is a component that provides electrical contact between the stationary wires and the rotating part of the motor. It's used to direct current to the rotor windings in a controlled way.

While these are the three key parts, there are other important components depending on the type of motor, such as bearings, brushes, and a housing.