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If the air gap between the rotor and stator of a 3-phase induction motor is increased, then

  • If the air gap between the rotor and stator of a 3-phase induction motor is increased, then Leakage reactance is increased.
  • In a 3-phase induction motor, the air gap between the rotor and stator affects the amount of magnetic flux that passes through the rotor.
  • If the air gap is increased, the magnetic flux passing through the rotor decreases, which in turn reduces the inductance of the rotor.
  • As the inductance of the rotor decreases, the leakage reactance of the motor increases.
  • Leakage reactance is the inductive reactance caused by the magnetic flux that does not link both the stator and rotor windings.
  • It is a measure of the amount of flux that leaks from the stator to the rotor without passing through the rotor core.
  •  If the air gap between the rotor and stator of a 3-phase induction motor is increased, the leakage reactance of the motor is increased.
  • This results in a decrease in the motor's efficiency and a decrease in its power factor.
  • The motor will also require more current to produce the same amount of torque, which may result in overheating of the motor.