Re: Current Limiting and Impedence

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 01:43 PM 5/12/2005, you wrote:
> Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>
>
> Malcolm,
> What about non-magnetic stainless steel welding rods in 1/16" diameter? Is 
> there some other reason not to use stainless steel? They are a lot more 
> expensive than mild steel but they are also non-magnetic or do they need 
> to be at least some magnetic? Thanks.
> Paul
> Think Positive


You've sort of answered your own question... the magnetic core in an 
inductor should be a magnetic material.

non-mag SS would be about the worst thing to use.  High eddy current 
losses, and no inductance.

The ideal materials are ones that are magnetically soft (i.e. they stick to 
a magnet, but they don't retain any magnetism, and can't be "magnetized" 
permanently) AND have high resistivity.