What is toroidal transformers?

Question

What is toroidal transformers?

Answer 1

What ARE toroidal transformers or what is a toroidal transformer?

Answer 2

They are concentrically wound transformers in the form of a 'doughnut' rather than the conventional square type.

Answer 3

The magnetic core of this type of transformer is in the form of a toroid(meaning a ring) so the magnetic field is well confined (little leakage).Sometimes made by coiling up metal strip to make the shape.The primary and secondary coils are then wound so that one covers the other and so that the conductors wind through the central hole.The whole thing resembles a doughnut.Normally single phase transformers are of the E and I type so that the preformed coils are placed on the central prong of the E and the magnetic circuit is completed by putting the I section to bridge all three arms of the E.  

Answer 4

Toroidal inductors and transformers are electronic components, typically consisting of a circular ring-shaped magnetic core of iron powder, ferrite, or other material around which wire is coiled to make an inductor. Toroidal coils are used in a broad range of applications, such as high-frequency coils and transformers. Toroidal inductors can have higher Q factors and higher inductance than similarly constructed solenoid coils. This is due largely to the smaller number of turns required when the core provides a closed magnetic path. The magnetic flux in a toroid is largely confined to the core, preventing its energy from being absorbed by nearby objects, making toroidal cores essentially self-shielding.