Working principle of AC fan:

The difference between AC axial fan and DC axial fan is that the former power supply is AC, the power supply voltage is negatively altered, the fan power supply voltage is fixed, and the circuit control must be rely on circuit control, so that the two sets of coils will work to produce different magnetic fields.

AC cooling fan is fixed due to the power supply frequency, so the magnetic pole variation speed of silicon steel sheet is determined by the power supply frequency. The frequency of the high magnetic field switching speed is faster, theoretical speed is more faster, just like the DC fan is extremely more speed. same. However, the frequency can not be too fast, the frequency is not too fast, which will cause difficulty in starting.

Working principle of DC fan:

DC cooling fan, the conductor passes through the current, and the magnetic field is generated around. When the conductor is placed in another fixed magnetic field, suction or repulsive force will cause the object to move. Inside the DC fan, there is a magnetic rubber magnet with a magnetic property. Surrounded by silicon steel sheets, the axial part is wound into two sets of coils, and the Hall induction component is used as the synchronous detection device, which controls a set of circuits, which makes the two sets of coils that work around the axis.

Silicon steel sheets produce different magnetic poles, and the magnetic pole produces a remodeling force in the rubber magnet. When the rendering force is greater than the static friction of the fan, the blade naturally turns. Since the Hall induction component provides a synchronous signal, the sector is thus continuously. The piece provides a synchronization signal, and the blade is thus continuously running.