2
The rotor will jam.
shaded pole
32 poles
The motor used in a table fan is usually a shaded pole motor.
15 to 40 ohms.
2, 4 or 6 poles
A 2-pole motor has about 1.5 ft-lbs of torque per horsepower where a 4-pole motor has 3 ft-lbs of torque. also the speed of a 2-pole motor is twice that of a 4-pole motor. The speed of a motor is determined by: speed=(120 x freq)/no. of poles At 60 Hz, a 4-pole motor is about 1800 rpm where a 2-pole motor is 3600
The rotor is made up of laminated steel discs that are pressed on to a common shaft. This shaft has bearings mounted on either end which allows the rotor to spin within the frame of the motor. The shorting bars on the rotor are usually made of aluminium.
The frequency of the applied voltage is consant.
2, 4 or 6 poles
Relationship between motor rpm and no of poles
The frequency of the applied voltage is constant.