.What is the relation of the stator slot leakage factor with the skew leakage reactance?

The stator slot leakage factor is directly related to the skew leakage reactance in electric machines, such as induction motors or generators. To understand this relationship, it’s important to first distinguish between these terms and their significance in the design and operation of such equipment.

Stator Slot Leakage Factor: This factor is a dimensionless quantity that represents the extent to which magnetic flux, produced by the current in the stator windings of an electric machine, does not link with the rotor but instead leaks through the air gap or is confined within the stator slots. It essentially quantifies the non-useful magnetic flux that doesn’t contribute to the torque production or the transformer action in the machine. The stator slot leakage factor is influenced by the geometry and dimensions of the stator slots, among other design parameters.

Skew Leakage Reactance: Skewing involves the slight angular displacement of either the stator slots or the rotor bars with respect to the axis of rotation. This is done to reduce torque ripple, minimize noise, and improve the operational smoothness of the motor. The skew results in additional leakage flux because it distorts the path of the magnetic flux that ideally should link the stator to the rotor. The skew leakage reactance quantifies this effect, expressing how the skewing impacts the machine’s impedance to the flow of alternating current due to the induced magnetic fields that do not participate in energy conversion.

Relation: The relation between the stator slot leakage factor and the skew leakage react