The structure of a DC motor consists of two parts: a stator and a rotor. The static part of a DC motor is called the stator. The main function of the stator is to generate a magnetic field, which is composed of a frame, a main magnetic pole, a commutating pole, an end cover, a bearing and a brush device.The rotating part during operation is called the rotor, which is mainly used to generate electromagnetic torque and induced electromotive force. It is the hub of DC motor energy conversion, so it is usually called armature. The armature is composed of a rotating shaft, an armature core, an armature winding, a commutator and a fan.