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Difference between DC fan and AC fan

Difference between DC FAN and AC FAN
 
The cooling fans are mainly DC cooling fan and AC cooling fan. The differences between the two kinds of fans are mainly shown in the following three points:

1. Different principles:
The power supply of AC cooling fan is AC, and the power supply voltage will change sinusoidally. However, the DC fan power supply voltage is fixed, so the two groups of coils work in turn to produce different magnetic fields. Because the power frequency of AC fan is fixed, the change speed of magnetic pole generated by silicon steel sheet is determined by the power frequency. The higher the frequency is, the faster the switching speed of magnetic field will be, and the faster the rotating speed will be in theory, just like the principle that the more poles of DC fan, the faster the speed. However, the frequency should not be too fast, too fast will cause activation difficulties. We use DC fans on our computer radiators. Generally, a good cooling fan mainly
investigates the air volume, speed, noise, service life, and the type of fan blade bearing used.

2. Different air volume:
For the same size of cooling fan, because the motor volume of AC fan is large, the fan blade is short, while that of DC fan is the opposite, the fan blade is long and the motor is small, so the air flow per unit area is more, the air volume is larger, and the heat dissipation capacity is better.

3. Different materials:
The AC fan frame is generally aluminum frame, while the DC fan frame is plastic frame, which has different high temperature resistance. The choice of DC fan or AC fan depends on which product is more suitable for the same cost.
Shenzhen ruianpu Electronic Co., Ltd. is a professional fan manufacturer with 20 years of R & D, production and sales experience. Main business: cooling fan, DC fan, AC fan, silent fan, centrifugal fan, blower and other full series of cooling and ventilation products as one of the integrity of the enterprise, series of cooling fan products have been UL, cul, CE, CCC, RoHS and other international certification.