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In an induction motor, if air gap is increased, its
- a)speed will reduce
- b)power factor will decrease
- c)efficiency will improve
- d)speed will increase
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
In an induction motor, if air gap is increased, itsa)speed will reduce...
Power factor
As air-gap of the motor is increased, the magnetising current and hence total current I increases. Therefore, power factor will decrease.
As air-gap of the motor is increased, the magnetising current and hence total current I increases. Therefore, power factor will decrease.
Most Upvoted Answer
In an induction motor, if air gap is increased, itsa)speed will reduce...
Explanation:
An induction motor is an AC motor in which the stator is connected to the power supply and the rotor is a short-circuited coil. The air gap between the stator and rotor is an essential parameter in the operation of an induction motor.
Effect of Increased Air Gap:
If the air gap is increased in an induction motor, the following effects will be observed:
Therefore, the correct answer is option 'B' - the power factor will decrease if the air gap in an induction motor is increased.
An induction motor is an AC motor in which the stator is connected to the power supply and the rotor is a short-circuited coil. The air gap between the stator and rotor is an essential parameter in the operation of an induction motor.
Effect of Increased Air Gap:
If the air gap is increased in an induction motor, the following effects will be observed:
- Decrease in Power Factor: A larger air gap increases the reactive power of the motor. This causes the power factor to decrease, leading to a less efficient operation of the motor.
- No Effect on Speed: The speed of an induction motor is not affected by the air gap. It is determined by the frequency of the power supply and the number of poles in the motor.
- Improvement in Efficiency: A smaller air gap results in a larger flux density in the air gap, which increases the losses due to eddy currents and hysteresis. Increasing the air gap reduces the flux density, which reduces these losses and improves the efficiency of the motor.
Therefore, the correct answer is option 'B' - the power factor will decrease if the air gap in an induction motor is increased.
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In an induction motor, if air gap is increased, itsa)speed will reduceb)power factor will decreasec)efficiency will improved)speed will increaseCorrect answer is option 'B'. Can you explain this answer?
Question Description
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