Protects from over current

Maintains constant speed

Protect the motor from over loading

Make and break the starting winding from supply

Using rings on poles

Using capacitor on winding circuits

Interchanging cage rotor windings by switch

Interchanging the field coil windings by switch

Speed regulation

Lower power consumption

Splitting of phase for torque

Controlling electrical interference

Mixer

Grinder

Ceiling fan

Washing machine

To get low resistance

To get low inductance

To get high resistance

To get high inductance