Views: 0 Author: Site Editor Publish Time: 2024-08-31 Origin: Site
The working principle of AC fan: Driven by AC power supply, the voltage will alternate positively and negatively, completely independent of circuit control, generating magnetic field. The change speed of magnetic pole produced by silicon steel sheet is determined by the frequency of power supply. The higher the frequency, the faster the magnetic field switching speed, the faster the rotational speed theoretically. However, the frequency can not be too fast, too fast will cause start-up difficulties.
The internal structure of AC fan (single-phase) is composed of two coil windings, one is start winding, the two windings are connected in series with each other, thus forming three points, the series point is the public end, the start winding end is the start winding end and the start winding end is the running end. In addition, a start-up capacitor is needed, usually between 12 uf, withstanding voltage is usually 250 v, with two joints. One end is connected to the end of the starting winding, the other end is connected to the end of the running winding, forming a triangle type. The power supply (without distinguishing the zero line of the fire line) is connected to the end of the running winding (that is, to the end of the capacitor), the other is connected to the common end, and the grounding wire is connected to the motor housing.
