The principle of speed reduction AC fan is mainly to reduce the fan speed by adjusting the pole pair number of the motor to achieve the speed reduction effect. Specifically, the speed reduction of AC fan usually uses the variable pole speed control method, by changing the connection of the motor winding, so that the number of pole pairs of the motor is changed, so as to reduce the speed of the motor.

The application of speed-reducing AC fans is very wide, for example, in industrial production workshops, flower greenhouses, farms and other places that need to cool down, ventilate and change the air, as well as supermarkets, offices and other places that need to reduce the indoor temperature. In addition, the speed-reducing AC fan can also be used to adjust the speed of the sander to meet different working requirements.

When choosing a speed-reducing AC fan, you need to consider factors such as speed regulation range, accuracy, cost, efficiency and ease of use. For example, AC fan speed regulation methods can use electronic speed controller, variable voltage speed regulation, thyristor speed regulation, thyristor speed regulation and motor speed regulation. Meanwhile, the AC cooling fan has heavy-duty characteristics, adapts to harsh environments, is supported by a streaming ball bearing, and the central drive pulley is supported by only one streaming ball bearing, which is windproof, dustproof, and rainproof, and is especially suitable for high-temperature or odourous industrial production workshops, as well as comprehensive cooling and ventilation in flower greenhouses, farms, and other places.