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

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

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  • #2
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They're used for lots of things: washers, bangles, rings on fingers; it's just a shape, like 'square' is.
 
  • #3
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How do Toroids work, and What are they used for?

Thanks
Are you thinking of toroidal magnets?
 
  • #4
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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."

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  • #5
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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?
 
  • #6
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I understand induction, but I can't think of any real-life applications of when a toroid would be useful.
 
  • #7
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Hmm, well, choke coils are fairly ubiquitous, see what a choke does and see if it looks useful.
 
  • #8
mgb_phys
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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.
 
  • #9
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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.
 
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