What is the purpose of interleaving the windings in a transformer?

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SSC JE Electrical 11 Oct 2023 Shift 3 Official Paper-I

Answer 1

Transformer

A transformer is a device that is used to increase or decrease the supply voltage without a change in the frequency of AC between circuits.
There are usually two windings primary and a secondary winding on the transformer core.
The core of a transformer is made up of silicon steel. The resistance of the core should be increased to hysteresis losses. Therefore by adding 3% silicon to the iron core, the hysteresis loss is reduced.
The windings used are interleaved in nature. An interleaved connection of a transformer winding refers to a method of connecting the windings in such a way that the voltage is distributed more evenly across the entire winding.
Interleaving winding reduces the leakage inductance and improves the overall performance of the transformer. Interleaved connections are often used in high-frequency and high-power applications to improve efficiency and reduce losses.
The core laminations are joined in the form of strips. The eddy current loss is minimized by using the thin core of lamination.