Small DC fan is a kind of heat dissipation fan manufactured by utilizing DC voltage and electromagnetic induction principle, which usually consists of rotor, stator, motor, and outer frame, and its core components are stator and rotor, which can control the rotating direction of the fan blades through Ampere's right-hand rule and Fleming's right-hand rule.

The advantages of small DC fans mainly include the following points:

1. High efficiency: DC fans are driven by DC motors, which have the advantages of low loss, high efficiency and high power factor, and can provide sufficient air volume at low speeds, thus reducing the working environment temperature of the equipment and extending the service life of the equipment.

2. Low noise: DC fan adopts micro DC motor, through the electromagnetic effect principle to drive the fan blade rotation, reduce the friction energy loss, low speed noise is also very low, can solve the problem of fan blade rotation noise.

3. Convenient control: DC fan speed performance is good, you can control the motor voltage or current to adjust the speed of the fan, and some even have more than ten adjustable gears, control and speed is very convenient.

4. Affordable: DC fan prices are relatively low, especially the miniature DC motor fan, the price cost is low, suitable for a variety of equipment.

5. long service life: DC fan service life is generally a few hundred hours, the service life is relatively long, can meet the long-term use of equipment needs.

6. Wide range of application: DC fans are widely used in various equipment, such as computers, automobiles, communication equipment, purifiers, etc., which can meet the cooling needs of different equipment.