The structure of a DC motor should consist of two main parts: the stator and the rotor. The stationary part of a DC motor during operation is called the stator. The main function of the stator is to generate a magnetic field, which is composed of the motor base, main magnetic poles, reversing poles, end caps, bearings, and brush devices. The part that rotates during operation is called the rotor, which mainly generates electromagnetic torque and induced electromotive force. It is the hub for energy conversion in DC motors, so it is usually called the armature, consisting of a shaft, armature core, armature winding, commutator, and fan.
