SOLUTION

A centrifugal fan is a mechanical device for moving air or other gases. The terms “blower” and “squirrel cage fan“, (because it looks like a hamster wheel), are frequently used as synonyms. Centrifugal fans are constant displacement with normal starting torque devices or constant volume devices, meaning that, at a constant fan speed, a centrifugal fan moves a relatively constant volume of air rather than a constant mass. This means that the air velocity in a system is fixed even though the mass flow rate through the fan is not.

For blower applications, the most common motors are 2-pole (3600 rpm), 4 poles (1800 rpm), and 6-pole (1200 rpm).

The most preferred motor for the blower is squirrel cage induction motor, synchronous motor, DC shunt Motor, Split-phase motor.