DC motor is a rotating electrical machine that converts DC electrical energy into mechanical energy or mechanical energy into DC electrical energy. It is a motor that can convert DC power and mechanical energy to each other. When it operates as a motor, it is a DC motor that converts electrical energy into mechanical energy. When it operates as a generator, it is a DC generator that converts mechanical energy into electrical energy.

The structure of the DC motor should consist of two parts: the stator and the rotor. The stationary part of the DC motor is called the stator. The main role of the stator is to generate a magnetic field. It is composed of the base, the main magnetic pole, the commutation pole, the end cap, the bearing and the brush device. The part that rotates during operation is called the rotor. Its main function is to generate electromagnetic torque and induced electromotive force. It is the hub of the DC motor for energy conversion, so it is also often called the armature. It consists of rotating shaft, armature core, armature winding, and replacement. Commutator and fan.