How magnetisation does is effected by the air gap present?

The amount of air or another non-magnetic material like a fibre plate or fibre board increases the reluctance of the circuit, thereby increasing the amount of current that we could put in a coil before we reach saturation. Also, the air gaps help the magnetic flux to expand outside the magnetic circuit.

What happens if the air gap becomes more or less?

1) The permeability of the magnetic circuit rotor-to-stator will decrease. 2) The magnetizing inductance of the motor thus decreases. 3) The magnetizing current will increase; This will cause a poor power factor at all loads.

Why is air gap crucial for magnetic circuit?

Air-gap is one of the most crucial part of magnetic circuits, especially in high power inductors. It significantly modifies parameters of magnetic devices by increasing of saturation current, linearizes B-H curve of magnetic circuit and causes decreasing of the inductance.

How is the magnetizing component of no load current with respect to the voltage?

3. How is the Magnetizing component with respect to the voltage? Explanation: The magnetizing current component is 90° out of phase with the voltage. The loss component is in phase with the voltage.

How is the magnetizing component with respect to the voltage?

What is the effect of increasing the length of the air gap in an induction motor?

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.

Why does the energy storage in a magnetic material occur mainly in the air gap?

If a high permeability material is used, then very little energy will be stored in the magnetic core. However, the air gap has an advantage of discontinuity and due to its low permeability stores significant amount of magnetic energy, as compared to the same volume of magnetic core before the saturation.

How should the air gap be present in the magnetic circuit according to length and cross section?

How should the air gaps be present in the magnetic circuit according to length and cross section? Explanation: The air gaps should be present in the magnetic circuit in the low length. The air gap should have maximum cross section to reduce the reluctance.