The outer cage winding carries most of the starting current which offer low impedance to the flow of current. The high resistance outer cage winding, therefore, develops a high starting torque.

Double Squirrel Cage Induction Motor
The double squirrel cage induction motor is a type of induction motor that consists of two sets of windings: the inner winding (rotor winding) and the outer winding (stator winding). The rotor winding is divided into two parts, namely the inner cage winding and the outer cage winding. Each cage winding is made up of bars or conductors shorted together at the ends.

Outer Cage Winding
The outer cage winding is connected to the stator winding and is responsible for providing the starting torque and maintaining the motor's speed under normal operating conditions. It is designed with a higher resistance compared to the inner cage winding. This higher resistance allows for better control of the motor's starting torque and speed regulation.

High Resistance
The outer cage winding has a high resistance compared to the inner cage winding. This high resistance helps in achieving the desired torque-speed characteristics of the motor. The high resistance in the outer cage winding results in a higher voltage drop and reduced current flow, which helps in controlling the starting torque and speed of the motor.

The high resistance in the outer cage winding also helps in improving the efficiency of the motor. By controlling the current flow and reducing losses, the motor can operate more efficiently and effectively.

Furthermore, the high resistance in the outer cage winding helps in reducing the rotor losses and improving the thermal performance of the motor. It allows for better heat dissipation and prevents the motor from overheating during prolonged operation.

In summary, the outer cage winding in a double squirrel cage induction motor has a high resistance to achieve better control of starting torque, speed regulation, and overall efficiency of the motor.