Ac cooling fans Design principle: Ac fans and DC fans Are distinguished. The first source is an AC source, and the current of the source will have a positive and negative conversion.
Unlike direct current fans, it relies on circuit control to allow two sets of coils to operate in tandem to create different magnetic fields.
Considering that the current frequency of the AC fan is fixed, the rate of pole transition caused by the silicon steel plate is determined by the current frequency. The higher the frequency, the faster the magnetic field conversion rate, the basic principle of the speed is also faster, just like the dc fan pole, the higher the speed, the same.
However, the frequency should not be too fast, too fast will cause activation difficult. All of their computer radiators are DC fans.
In general, a good fan is key to investigate air volume, air, noise, service life and what kind of fan bearing shaft to use.