Question

Hey guys,
Do anyone have any Idea to reduce the Eddy Current to Zero? [E.M.I.]

Answer 1

• In order to reduce the eddy current loss, the resistance of the core should be increased.
• In devices like transformers, the core is made up of thin sheets of steel, each lamination being insulated from others by a thin layer of varnish.
• As the laminations are thin, they will have relatively high resistance.
• The planes of these sheets are placed perpendicular to the direction of the current that would be set up by the induced emf. The planes of these sheets are arranged parallel to the magnetic fields so that they can cut across the eddy current paths.

• Large resistances between the sheets confines the eddy currents to the thin sheets. Each lamination sheet will have an eddy current circulates within it. Tiny eddy currents still exist, but only within each thin sheet, so are greatly reduced.

• The sum of individual eddy current of all the laminations are very less compared to that of using single solid iron core.

Answer 2

Explanation:

⭐In order to reduce the eddy current loss, the resistance of the core should be increased. In other words, low reluctance should be retained.

⭐In devices like transformers, the core is made up of laminations of iron. ie,the core is made up of thin sheets of steel, each lamination being insulated from others.

⭐As the laminations are thin, they will have relatively high resistance.

⭐The eddy current loss is proportional to f2. So at higher frequencies, the eddy current loss is very high.

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