How to control the speed of electric fan? What is the principle?

There are two kinds of speed regulation methods for general household electric fans: reactor speed regulation and step-down.

1, the characteristic of tap speed regulation is that it only changes the wiring of stator winding without reactor, so it consumes less power, saves materials and is light in weight, so it is widely used. However, once the fan winding is burned, it is often difficult to judge the wiring mode and tap turns inside the stator winding, which brings difficulties to the repair work.

2. The speed of the electric fan is mainly controlled by reducing the voltage, with low voltage and slow speed and high voltage and fast speed. The principle of this governor is transformer. The transformer is input with a voltage of 220v and divided into five taps at the output. Tap is used to gradually reduce the voltage to reach all gears.

Extended data:

Electric fan speed regulation mode:

1, step down with autotransformer tap.

2, motor winding tap speed change (ceiling fan used less, desk fan used more).

3. Capacitor step-down speed regulation; Now the governor is used. The electronic governor changes the voltage of the fan motor by adjusting the conduction angle of the thyristor through the potentiometer, so as to achieve the purpose of stepless adjustment of the speed.

Generally, the power of electronic governors of electric fans is relatively small, and there are product descriptions and wiring diagrams on the back of the products. It is connected in series in the circuit like an old-fashioned induction governor. Its working principle is roughly to change the voltage through the adjustable potentiometer and add different voltages to the thyristor to achieve the purpose of speed regulation.

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