Torus core vs. Toroid core

[nilrehob]

I'm planning on making a transformer using garden-wire as core.
This gives me the opportunity to make a poor-mans toroid core.
Or should I make it a torus core, first wind the coil-wires like an air-core coil, and then wind the garden-wire around it?

Does anyone have an opinion on this?

/Hob

[SuperCaviTationIstic]

Tesla did both, with a layer of ferrous core material inside, the conductive wire around it, and an other layer of core outside. Also, consider the possibility of using a diamagnetic material for the outside or inside, as a shield/spring like reinforcement for the magnetic field to be contained and strengthened.

And will someone please add diamagnetic to the list of acceptable words in the spellcheck on this site? paramagnetic is there, why not diamagnetic?

[HairBear]

Right click the red underlined word and choose the "Add to Dictionary" option listed just below the list of possible spellings in bold.

[rave154]

nilrehob,

not sure exactly what you mean here.

A Toroid is the classic donut shape im sure youre familiar with, where-as a torus is the "skin" of the toroid.

[SuperCaviTationIstic]

Also, consider winding a toroid the way one naturally forms.... not around the circle, but rather from the center down, out to the edge, up, and back in.... Like the way a smoke ring circulates..... NEVER once have I seen anyone use this configuration.

[nilrehob]

nilrehob,

not sure exactly what you mean here.

A Toroid is the classic donut shape im sure youre familiar with, where-as a torus is the "skin" of the toroid.

By the torus version i mean first make the copper-wire in a big loop with air-core and then wind the core around it.
If You use garden-wire (with iron in it) as core-material, the copper-wire and the garden-wire just change place between the two types.
So if the garden-wire is green as mine is, the two has the same shape, but the toroid is copper-colored and the torus is green.
Not sure if that make sense.

/Hob

[nilrehob]

Also, consider winding a toroid the way one naturally forms.... not around the circle, but rather from the center down, out to the edge, up, and back in.... Like the way a smoke ring circulates..... NEVER once have I seen anyone use this configuration.

You mean like stacked pancake-coils?

/Hob

[rave154]

By the torus version i mean first make the copper-wire in a big loop with air-core and then wind the core around it.
If You use garden-wire (with iron in it) as core-material, the copper-wire and the garden-wire just change place between the two types.
So if the garden-wire is green as mine is, the two has the same shape, but the toroid is copper-colored and the torus is green.
Not sure if that make sense.

/Hob

Thats an interesting idea, id never thought of that.

It would be even more interesting if you could use insulated iron wire as you would be able to monitor voltage/current (if any) in the "core" too.

[SuperCaviTationIstic]

You mean like stacked pancake-coils?

/Hob

exactly.... but perhaps with a larger diameter in the center, and with smallest diameters at the openings

[SuperCaviTationIstic]

now that I think of it, that's not exactly what I meant. Just wind around the outside of a toroid clockwise, and inside counterclockwise, or viseversa