A small air gap in poly phase induction motor helps to
A. reduce chance of crawling.
B. increase starting torque.
C. reduce chance of cogging.
D. reduce magnetizing current.
Answer: D
Share your understanding of this question with the correct explanation.
he small air gap in a polyphase induction motor helps to reduce the magnetizing current.
The air gap in an induction motor is the distance between the rotor and stator. A smaller air gap reduces the reluctance of the magnetic circuit and improves the magnetic coupling between the rotor and stator. This improved magnetic coupling results in a more efficient transfer of magnetic flux, reducing the magnetizing current required to produce the necessary magnetic field.
By reducing the magnetizing current, the motor operates more efficiently, with less power wasted in the magnetizing component. This leads to improved power factor and higher overall motor efficiency.
Therefore, option D, “reduce magnetizing current,” is the correct answer.