Why are modern transformer cores constructed from laminated thin sheets of iron instead of a single solid block?

Answer

To reduce parasitic eddy current losses

Solid iron cores suffer from eddy currents, which are circulating electrical currents induced within the core material that cause wasteful heat generation. By building the core from thin, insulated sheets, engineers break the path of these currents, significantly reducing energy loss and increasing the overall efficiency of the power system.

Why are modern transformer cores constructed from laminated thin sheets of iron instead of a single solid block?

#Videos

History of Power Transformers - YouTube

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