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The speed of a 3-phase induction motor operating in its stable region
- a)decreases with increase in load torque
- b)increases with increase in load torque
- c)decreases with decrease in load torque
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The speed of a 3-phase induction motor operating in its stable regiona...
Speed-Torque Characteristics of 3-phase Induction Motor
The speed-torque characteristics of a 3-phase induction motor show the relationship between the motor's speed and torque output. This curve is important in understanding the motor's stability, efficiency, and performance under different load conditions.
Stable Region of Operation
The stable region of operation is the range of load torques at which the motor can maintain a constant speed without stalling or overheating. In this region, the motor's speed decreases slightly with an increase in load torque due to the increased mechanical load on the motor shaft.
Effect of Load Torque on Motor Speed
As the load torque increases, the motor's speed decreases because the rotor experiences more mechanical resistance. This resistance slows down the motor's rotational speed, resulting in a decrease in output speed. Therefore, option A is the correct answer as the speed of a 3-phase induction motor operating in its stable region decreases with an increase in load torque.
Effect of Load Torque on Motor Current
As the load torque increases, the motor's current also increases to meet the increased mechanical load on the motor. This increased current creates more heat and reduces the motor's efficiency, leading to a decrease in overall performance.
Conclusion
In conclusion, the speed-torque characteristics of a 3-phase induction motor show that the motor's speed decreases with an increase in load torque due to increased mechanical resistance. This decrease in speed can lead to reduced performance and efficiency, making it important to carefully match the motor's load requirements to ensure optimal operation.
The speed-torque characteristics of a 3-phase induction motor show the relationship between the motor's speed and torque output. This curve is important in understanding the motor's stability, efficiency, and performance under different load conditions.
Stable Region of Operation
The stable region of operation is the range of load torques at which the motor can maintain a constant speed without stalling or overheating. In this region, the motor's speed decreases slightly with an increase in load torque due to the increased mechanical load on the motor shaft.
Effect of Load Torque on Motor Speed
As the load torque increases, the motor's speed decreases because the rotor experiences more mechanical resistance. This resistance slows down the motor's rotational speed, resulting in a decrease in output speed. Therefore, option A is the correct answer as the speed of a 3-phase induction motor operating in its stable region decreases with an increase in load torque.
Effect of Load Torque on Motor Current
As the load torque increases, the motor's current also increases to meet the increased mechanical load on the motor. This increased current creates more heat and reduces the motor's efficiency, leading to a decrease in overall performance.
Conclusion
In conclusion, the speed-torque characteristics of a 3-phase induction motor show that the motor's speed decreases with an increase in load torque due to increased mechanical resistance. This decrease in speed can lead to reduced performance and efficiency, making it important to carefully match the motor's load requirements to ensure optimal operation.
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