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If the supply voltage of 3-phase induction motor is increased two times, then, torque is .
- a)increased two times
- b)decreased two times
- c)increased four times
- d)decreased four times
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
If the supply voltage of 3-phase induction motor is increased two time...
C. bcuz torque is directly proportional to square of the voltage in 3 phase induction motors so as we increase voltage 2 times then torque will be (2)^2=4 times
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If the supply voltage of 3-phase induction motor is increased two time...
Explanation:
When the supply voltage of a 3-phase induction motor is increased two times, the following changes occur:
1. Increase in Rotor Current:
The rotor current of an induction motor is directly proportional to the supply voltage. When the supply voltage is increased two times, the rotor current also increases two times.
2. Increase in Rotor Impedance:
The rotor impedance of an induction motor is directly proportional to the rotor current. When the rotor current increases two times, the rotor impedance also increases two times.
3. Decrease in Rotor Speed:
The rotor speed of an induction motor is inversely proportional to the rotor impedance. When the rotor impedance increases two times, the rotor speed decreases two times.
4. Decrease in Torque:
The torque of an induction motor is directly proportional to the rotor current and rotor speed. When the rotor current increases two times and the rotor speed decreases two times, the torque decreases four times.
Therefore, the correct answer is option B, i.e., the torque is decreased two times.
When the supply voltage of a 3-phase induction motor is increased two times, the following changes occur:
1. Increase in Rotor Current:
The rotor current of an induction motor is directly proportional to the supply voltage. When the supply voltage is increased two times, the rotor current also increases two times.
2. Increase in Rotor Impedance:
The rotor impedance of an induction motor is directly proportional to the rotor current. When the rotor current increases two times, the rotor impedance also increases two times.
3. Decrease in Rotor Speed:
The rotor speed of an induction motor is inversely proportional to the rotor impedance. When the rotor impedance increases two times, the rotor speed decreases two times.
4. Decrease in Torque:
The torque of an induction motor is directly proportional to the rotor current and rotor speed. When the rotor current increases two times and the rotor speed decreases two times, the torque decreases four times.
Therefore, the correct answer is option B, i.e., the torque is decreased two times.
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If the supply voltage of 3-phase induction motor is increased two times, then, torque is .a)increased two timesb)decreased two timesc)increased four timesd)decreased four timesCorrect answer is option 'C'. Can you explain this answer?
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