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In the normal operating speed of an induction motor, torque is:
- a)directly proportional to slip
- b)directly proportional to the square of the slip
- c)inversely proportional to the square of the slip
- d)inversely proportional to slip
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
In the normal operating speed of an induction motor, torque is:a)direc...
Torque-Speed Characteristics:
At the low slip region, the torque is proportional to slip. Hence, in the normal working region of the motor, the value of the slip is small. The torque slip curve is a straight line.
Torque ∝ slip
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In the normal operating speed of an induction motor, torque is:a)direc...
Induction Motor Operating Speed and Torque Relationship
In an induction motor, the speed of the rotor is always slightly less than the synchronous speed. This difference in speed is known as the slip. The slip is given by the formula:
Slip (s) = (Ns - Nr) / Ns
Where:
- Ns is the synchronous speed of the motor (in revolutions per minute)
- Nr is the rotor speed of the motor (in revolutions per minute)
The torque produced by an induction motor is directly related to the slip. Let's understand this relationship in more detail:
1. Torque-Speed Characteristics of an Induction Motor
- When an induction motor is running at the synchronous speed, the slip is zero. In this case, the rotor is not moving relative to the rotating magnetic field produced by the stator, resulting in zero torque.
- As the load on the motor increases and the rotor speed drops slightly, the slip increases. This increase in slip results in an increase in the torque produced by the motor. Therefore, torque is directly proportional to slip.
- As the slip further increases, the torque produced by the motor continues to increase.
- At the maximum torque point, known as the breakdown torque, the slip is typically around 5-10%.
2. Relationship between Torque and Slip
- The relationship between torque and slip can be expressed by the equation:
Torque ∝ Slip
- This means that torque is directly proportional to slip. As slip increases, torque also increases.
Conclusion
In conclusion, in the normal operating speed of an induction motor, torque is directly proportional to slip. As the slip increases, the torque produced by the motor also increases. This relationship is important in determining the performance characteristics and operating conditions of induction motors.
In an induction motor, the speed of the rotor is always slightly less than the synchronous speed. This difference in speed is known as the slip. The slip is given by the formula:
Slip (s) = (Ns - Nr) / Ns
Where:
- Ns is the synchronous speed of the motor (in revolutions per minute)
- Nr is the rotor speed of the motor (in revolutions per minute)
The torque produced by an induction motor is directly related to the slip. Let's understand this relationship in more detail:
1. Torque-Speed Characteristics of an Induction Motor
- When an induction motor is running at the synchronous speed, the slip is zero. In this case, the rotor is not moving relative to the rotating magnetic field produced by the stator, resulting in zero torque.
- As the load on the motor increases and the rotor speed drops slightly, the slip increases. This increase in slip results in an increase in the torque produced by the motor. Therefore, torque is directly proportional to slip.
- As the slip further increases, the torque produced by the motor continues to increase.
- At the maximum torque point, known as the breakdown torque, the slip is typically around 5-10%.
2. Relationship between Torque and Slip
- The relationship between torque and slip can be expressed by the equation:
Torque ∝ Slip
- This means that torque is directly proportional to slip. As slip increases, torque also increases.
Conclusion
In conclusion, in the normal operating speed of an induction motor, torque is directly proportional to slip. As the slip increases, the torque produced by the motor also increases. This relationship is important in determining the performance characteristics and operating conditions of induction motors.
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In the normal operating speed of an induction motor, torque is:a)directly proportional to slipb)directly proportional to the square of the slipc)inversely proportional to the square of the slipd)inversely proportional to slipCorrect answer is option 'A'. Can you explain this answer?
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