The starting torque of a three-phase induction motor can be increased by:

The starting torque of a three-phase induction motor can be increased by:

1. Increasing the supply voltage: The torque of an induction motor is proportional to the square of the supply voltage. So, if the supply voltage is increased, the torque will also increase.

2. Using a motor with a higher number of poles: The torque of an induction motor is also proportional to the square of the number of poles. So, using a motor with more poles will increase the starting torque.

3. Reducing the rotor resistance: The starting torque is inversely proportional to the rotor resistance. So, if the rotor resistance is reduced, the starting torque will increase.

4. Using a motor with a larger rotor diameter: The torque of an induction motor is proportional to the square of the rotor diameter. So, using a motor with a larger rotor diameter will increase the starting torque.

5. Using a motor with a higher slip: The torque of an induction motor is proportional to the slip. So, using a motor with a higher slip will increase the starting torque.