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How toroid transformer dissipates the heat generated by inner windings ?
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BravoV:
As its buried and encapsulated deep in the middle, and also sometimes with another layer/s of inter winding isolation added ?

When it comes to heat dissipation, does the common EI core has more advantage ? As it has much more openings and exposed slits.

Scope of discussion is mains transformer, say common step down.
Zero999:
Toroidal transformers tend to be more efficient than EI core transformers, so there's less heat to deal with.
T3sl4co1l:
Yes, the core and inner windings have to conduct their heat through the outer layers.

A good reason for transformers to be impregnated with varnish, to reduce thermal resistance.

Toroids also have more surface area than shell type transformers.

Tim
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