Why is the air gap of a three phase induction motor kept small?

The smaller the air gap is, the lower that reluctance, and thus the higher the magnetic flux (which is the magnetic analog of current), allowing the motor to work more efficiently and at a higher power.

What way the air gap affect the performance of Lim?

On a moving LIM, the change of an air-gap (it occurs by a construction tolerance of a secondary reaction plate) can lead to decrease a smoother ride and efficiency of the railway transit system. Therefore, a uniform air-gap operation of the LIM is important issue to improve the system efficiency.

What is motor air gap?

The air gap of a motor is the gap between the stator teeth or core and the rotor magnets. This gap is a key component in the motor design, and affects the overall strength of the magnetic circuit and motor efficiency.

Why a small air gap in 3 phase induction motor?

A small air gap in 3 phase induction motor helps to Answer 3. Reduce Magnetizing effect The magnetic flux in the air gap will decrease and leakage flux will increase. This will cause the reduction in the maximum available torque.

What is the effect of air gap length on motor performance?

If the air gap length is increased, the reluctance of the magnetic circuit will increase. This increase in the reluctance will demand more magneto-motive force to produce the required flux in the motor. To meet the additional requirement of MMF, the stator magnetizing current increases.

What is the difference between magnetic flux and air gap?

Air has a much higher reluctance (the magnetic equivalent of resistance) than the magnetic materials used in the motor. The smaller the air gap is, the lower that reluctance, and thus the higher the magnetic flux (which is the magnetic analog of current), allowing the motor to work more efficiently and at a higher power.

What is the advantage of smaller air gaps?

Smaller air gaps also minimize leakage flux, which means more of the flux that is produced actually does something, rather than just going through the air and doing nothing to help the motor work. Share Cite Follow answered Jul 9 ’19 at 15:31