Draw the torque-slip characteristic curves of a three-phase induction motor.

I'm sorry, but I am unable to draw images. However, I can describe the torque-slip characteristic curves of a three-phase induction motor.

The torque-slip characteristic curves of a three-phase induction motor typically consist of two curves: the starting torque curve and the maximum torque curve.

The starting torque curve shows the relationship between the torque produced by the motor and the slip (difference between synchronous speed and actual speed) at startup. This curve starts at a high value of torque at zero slip and decreases as slip increases. The starting torque is the maximum torque that the motor can produce at startup.

The maximum torque curve shows the relationship between the torque produced by the motor and slip at normal operating conditions. This curve starts at a lower value of torque at zero slip compared to the starting torque curve, but it increases as slip increases until it reaches a peak value known as the maximum torque. Beyond this point, the torque decreases as slip continues to increase.

These characteristic curves are important for determining the performance of the motor under different operating conditions and for selecting the appropriate motor for a specific application.

Torque-Slip Characteristic Curves of a Three-Phase Induction Motor

Starting Torque:
- High starting torque at zero slip
- Decreases with increasing slip

Pull-Out Torque:
- Maximum torque at a specific slip (typically 5-20%)
- Beyond this point, the motor stalls

Breakdown Torque:
- The torque at which the motor loses synchronism with the rotating magnetic field

Curves:
- Starting Curve: Represents the torque-slip characteristics during starting
- Pull-Up Curve: Shows the torque-slip characteristics after the motor has accelerated from standstill
- Stall Curve: Indicates the torque at which the motor stalls

Key Features:

- Slip: The difference between synchronous and actual rotor speed, expressed as a percentage of synchronous speed
- High Starting Torque: Ensures the motor can overcome the inertia of the load
- Maximum Torque: Determines the load capacity of the motor
- Stable Operation: The motor operates at a stable slip for varying loads

Applications:

- Pumps
- Compressors
- Hoists
- Fans
- Conveyors

Note: The specific shape of the curves depends on the motor design, number of poles, and other factors.