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Working principle of AC fan

The structure of AC fan is generally divided into stator and rotor. The stator includes motor, outer frame, bearing, retaining ring, spring and silicon steel sheet; rotor includes fan blade and shaft center; winding part of motor is composed of silicon steel sheet, enameled wire and insulated steel frame. AC fan must rely on circuit control, using alternating current, two groups of coils work alternately to produce different magnetic fields. Therefore, AC fan can work normally is determined by the power supply frequency. The higher the frequency is, the faster the switching speed of magnetic field is, and the faster the theoretical speed is, just as the more poles of DC DC fan are, the faster the speed is. However, the frequency should not be too fast, otherwise it is easy to cause activation difficulties.

To understand how it works, you must first understand what alternating current is. Alternating current refers to the current whose size and direction change periodically because the average operation of periodic current is zero, that is, AC current or AC current (referred to as AC). The internal structure of AC fan is composed of two coils, which are connected with each other to form three series points. Each point is a common end, the starting end is the starting winding end, and the running end is the running winding end. In addition, the starting capacitor is also an important part of the AC fan, usually with a voltage resistance of 250 V between 12 uf. The two connectors of the starting capacitor are connected to the end of the starting winding and the other end to the end of the running winding to form a triangle. The power supply does not need to distinguish the zero line of the live line. The other end is connected to the end of the capacitor and the other end is connected to the common terminal. Then the motor shell can ensure the normal operation of the AC fan. In addition, because the internal structure of AC fan is mainly transformer, the data selected for AC fan are mostly tungsten needle or stainless steel data. If the voltage is too high, the service life of transformer will be affected.

Shenzhen Ruiapple 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.