Ferrites

[[email protected]]

Hi

I'm trying to find a good online source of C-shaped Ferrites (im not
sure whether thats there correct name sorry, ferrite is definatly what
im after only in a C shape, gapped ring?)

I would like to experiment with the gap of the ferrite so thats
something im interested in finding on a supplier website.

Any leads?

Thanks

David

 

[Joerg]

Hi

I'm trying to find a good online source of C-shaped Ferrites (im not
sure whether thats there correct name sorry, ferrite is definatly what
im after only in a C shape, gapped ring?)

Just buy U cores. They often come in pairs, meaning you get two for one

http://www.amidoncorp.com/aai_ucores.htm

I would like to experiment with the gap of the ferrite so thats
something im interested in finding on a supplier website.

They sell small quantities and in the past my experience has been good:
http://www.amidoncorp.com/index.html

Any leads?

Make sure you buy the right material for the frequency range of your choice.

 

[Robert Baer]

Hi

I'm trying to find a good online source of C-shaped Ferrites (im not
sure whether thats there correct name sorry, ferrite is definatly what
im after only in a C shape, gapped ring?)

I would like to experiment with the gap of the ferrite so thats
something im interested in finding on a supplier website.

Any leads?

Thanks

David

If you need a gap for a "C" (aka "U") shape, the only way is to use
some thin tape, thin plastic or thin paper.

 

[[email protected]]

Its the type on the left of the image in this link that Im interested
in procuring -

http://sci-toys.com/scitoys/scitoys/magnets/calculating/electromagnet.gif

Do they essentially act the same as the U-cores you have mentioned
above?

Thanks

David

 

[Eeyore]

Hi

I'm trying to find a good online source of C-shaped Ferrites (im not
sure whether thats there correct name sorry, ferrite is definatly what
im after only in a C shape, gapped ring?)

C shapes ? Can't say I've met those.

Get the online catalogues from Epcos, TDK and Ferroxcube. They should tell you
pretty much what people today are actually using.

Graham

 

[Paul Mathews]

Hi

I'm trying to find a good online source of C-shaped Ferrites (im not
sure whether thats there correct name sorry, ferrite is definatly what
im after only in a C shape, gapped ring?)

I would like to experiment with the gap of the ferrite so thats
something im interested in finding on a supplier website.

Any leads?

Thanks

David

Gapped ferrite toroids are readily available, since they are used for
a number current and magnetic field sensing applications and
occasionally to build energy storing inductors. You may want to
specify 'no fill material' in the gap. Or, you can make your own,
using a tile-cutting saw or other diamond blade. The material is
brittle, so support it well during cutting. It seems to me that the
last time I had need, I got them from Elna:
http://www.elnamagnetics.com/

Paul Mathews

 

[Joerg]

Gapped ferrite toroids are readily available, since they are used for
a number current and magnetic field sensing applications and
occasionally to build energy storing inductors. You may want to
specify 'no fill material' in the gap. Or, you can make your own,
using a tile-cutting saw or other diamond blade. The material is
brittle, so support it well during cutting. It seems to me that the
last time I had need, I got them from Elna:
http://www.elnamagnetics.com/

And don't try this on a tile cutting saw with a blade that was already
used for a few hundred sqft of Italian porcelain. Speaking from
experience here ...

BTW, in the US the MadDog 225 blades are really good but a 7-1/4 incher
will set you back almost 50 bucks. Worth it though.

 

[legg]

Its the type on the left of the image in this link that Im interested
in procuring -

http://sci-toys.com/scitoys/scitoys/magnets/calculating/electromagnet.gif

Do they essentially act the same as the U-cores you have mentioned
above?

This image is labelled 'iron core'. This is for a good reason, if you
intend to experiment with electromagnets. A material with a high DC
saturation flux density (ie not ferrite) allows for larger magnetic
fields to be created in the gap.

The structure is a tape-wound core that is cut after impregnation,
but the same effect can be created using Uor I laminationsm as long
as the only gap present in the circuit is where you want it.

UI shapes start on page 62 here
http://www.thomas-skinner.com/pdf/laminations_singlephase.pdf

C cores and cut cores
http://www.magmet.com/cutcore.php

RL