Diagram of the circuit principle of an electric fan

Hello everyone, today I would like to share with you the circuit principle of the electric fan around us. Let’s explain it to you based on the circuit diagram.

Electric fan circuit diagram

As can be seen from the picture above, this circuit can be divided into three parts, the 220V AC power circuit on the far left, the swing circuit in the middle, and the fan circuit on the far right. The electric fan motor is a single-phase AC motor. It has two windings inside, one is called the running winding (also called the main winding), and the other is the starting winding (also called the auxiliary winding). The starting circuit is composed of split-phase capacitors, so that the main and auxiliary windings are spatially separated by 90° electrical angle. The speed regulating circuit is composed of a reactor speed regulating switch connected in series. By adjusting the size of the reactance, the voltage of the motor is changed to achieve speed regulation. After understanding this circuit diagram, it is enough to repair the electric fan.