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Time：2021-09-07Views：0
Our commonly used cooling fans are mainly DC cooling fans and AC cooling fans. Before choosing, perhaps we need to understand the difference between these two different cooling fans?
The principle is different:
The power supply of the AC cooling fan is AC, and the power supply voltage will change sinusoidally. However, the power supply voltage of the DC fan is fixed and must rely on circuit control to make the two sets of coils work in turn to generate different magnetic fields. The AC fan has a fixed power frequency, so the magnetic pole change speed generated by the silicon steel sheet is determined by the power frequency. The higher the frequency, the faster the magnetic field switching speed. Theoretically, the faster the speed will be, just like the principle that the more poles of the DC fan, the faster the speed. Same. However, the frequency should not be too fast, too fast will cause difficulty in activation. DC fans are used on our computer radiators. Generally, a good cooling fan mainly examines the air volume, speed, noise, length of service life, and what type of fan blade bearing is used.
Different air volume:
For cooling fans of the same size, because the AC fan motor has a large size, the fan blades are short, and the DC fan is just the opposite. The fan blades are 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.
Different materials:
The outer frame of the AC fan is generally aluminum frame, while the outer frame of the DC fan is plastic frame. The ability to withstand high temperature is different, and the AC fan is better.
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