Outer frame: Made of pressed plastic, generally square or round;

Bearing: Made of high-precision ball bearings;

Blades: Fixed on the outer rotor of the fan, the outer rotor is a plastic magnetic ring;

Magnetic strips: Plastic magnetic disks are used, which are magnetized by a magnetizer to form magnetic strips with magnets;

Rotor: The blades and magnetic strips together constitute the rotating part of the DC cooling fan;

Stator: The fixed non-rotating part of the cooling fan, generally composed of four large teeth forming four poles, with two sets of coils wound on the four poles.