SOLUTION

A shaded pole motor does not possess Commutator, centrifugal switch & capacitor.

SHADED-POLE MOTORS

The shaded-pole motor has the lowest starting torque of all the single-phase motors. It is relatively inexpensive and is used to turn very small fan blades connected directly to the shaft of the motor. The basic construction of this motor is very simple since no start winding is present. The imbalance in the magnetic field needed to produce rotation is obtained by shading a portion of the run winding with heavy copper wire or band.

When the motor is energized, the strength of the magnetic field is different in the area of the main poles than in the area of the shaded poles, allowing the rotor to turn.

Note:-

• A shaded pole motor does not have the starting winding, therefore there is no need of the centrifugal switch.
• The capacitor is not used in the shaded pole because phase shift is produced by the method of induction.
• Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors, as well as universal motors and a shaded-pole motor, is the original type of AC single-phase induction motor, therefore there is no need for commutation.