How do Toroids work, and What are they used for?

[Triangulum]

Main Question or Discussion Point

How do Toroids (inductors) work, and What are they used for (in electronics and/or other physics applications)?

Thanks

 

[deferro]

They're used for lots of things: washers, bangles, rings on fingers; it's just a shape, like 'square' is.

 

[Dadface]

How do Toroids work, and What are they used for?

Thanks

Are you thinking of toroidal magnets?

 

[Triangulum]

Sorry for not specifying, but I meant Toroids as in the electricity and magnetism part of physics, such as an inductor or a "round solenoid."

Thanks

 

[deferro]

A toroidal ferrite core with wire wound on it is called a choke in EE.
Try wikipedia (and an old PC power supply); do you understand induction?

 

[Triangulum]

I understand induction, but I can't think of any real-life applications of when a toroid would be useful.

 

[deferro]

Hmm, well, choke coils are fairly ubiquitous, see what a choke does and see if it looks useful.

 

[mgb_phys]

I understand induction, but I can't think of any real-life applications of when a toroid would be useful.

An inductor blocks transmission of a fast changing signal such as external interference on a wire.
They are normally only called chokes when they are inductors in circuit.

 

[Phrak]

It depends on the application, and frequency domain where the material can be powdered iron, or wound soft steel tape, or ferrite.

In small, bead form, on a wire, torroids block noise. Toroidal cores are even used in 60Hz transformers where a low profile is a requirement. Current transformers, antenna balums, and line filters are some uses. Way back when, square BH core material toroids were used to store data bits (core memory).

Packaged with a couple capacitors, or used discretely, they are commonly used as line filters.