08-16-2017, 09:15 PM
Working and construction of electric fan
An electric fan is an electric motor to which the blats are fixed so that then the motor of the fan rotates ,the balds through the air A D.C fan are of DC series motor in which the rotating part armature is connected in series with the stationary part and when the current is given to the motor , the magnetic field is set up in the field winding which experience a force in the armature to move it at right angle to the feed and balds attached with shaft of armature displaced the air. the same principle applies to AC fan but there is some difference in the construction of AC fan and DC at the rotating part of the AC fan a start of rotor and the stationary part of the fan .stater and Armature.
In case of AC fan mainly two types of single phase motor are used.
1. Shaded core type motor
2. Capacitor run type motor
In case of AC or DC fan the universal motor are used in which the bound armature and field winding are connected in series. the speed of the fan are controlled by regulators. the regulator of resistance steps in series of the supply. the applied voltage to the motor is varied by voltage changing these resistances is steps and the fan work on the speed which be required.
