Double Cage Induction Motor Explained in Hindi

A Double Cage Induction motor is that type of motor in which a double cage or two rotor windings or cages are used. This arrangement is used for obtaining high starting torque at a low value of starting current. The stator of a double cage rotor of an induction motor is the same as that of a normal induction motor. In the double cage rotor of an induction motor, there are two layers of the bars.
A Double Cage Induction motor is a type of motor in which a double cage or two rotor windings or cages are used.
This arrangement is used for obtaining high starting torque at a low value of starting current.
In the double cage rotor of an induction motor, there are two layers of bars.
Each layer is short-circuited by the end rings.
The resistance of the outer cage is greater than the resistance of the inner cage while the reactance of the inner cage is greater than the outer cage.
At starting, the voltage induced in the rotor is the same as the supply frequency that is (f2 = f1).
The outer cage winding carries most of the starting current which offers low impedance to the flow of current. The high resistance outer cage winding, therefore, develops a high starting torque.
As the rotor speed increases, the frequency of the rotor EMF decreases. At normal operating speed, the leakage reactance of both the windings becomes negligibly small.
The current in the rotor divides between the two cages and is governed by their resistances.
The resistance of the outer cage is about 5 to 6 times that of the inner cage. Hence, the torque of the motor is developed mainly by the low-resistance inner cage and is developed under normal operating speed.

[@sanamsingh1285]

best explanation, throughout concept clear, good afford

[@SrushtiKorde-m5i]

Thanks!