Re: Current Limiting and Impedence

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

Hi Paul,

On 12 May 2005, at 14:43, Tesla list 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

If you do that you would be better off using nothing at all. There
will be eddy current losses associated with stainless steel and no
significant increase in permeability to justify using a core.

Malcolm


> ----- Original Message -----
> From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> Sent: Thursday, May 12, 2005 12:27 PM
> Subject: Re: Current Limiting and Impedence
>
>  > Original poster: "Gerald  Reynolds"
> <<mailto:gerryreynolds@xxxxxxxxxxxxx>gerryreynolds@xxxxxxxxxxxxx>
>  >
>  > Hi Malcolm,
>  >
>  > Where can you get Silicon steel?? Do they make welding rods out of
>  this > stuff or is there another alloy that would work?? and what
>  diameter rod > should we be looking for?? > > Gerry R. > > >>Original
>  poster: "Malcolm Watts"
> <<mailto:m.j.watts@xxxxxxxxxxxx>m.j.watts@xxxxxxxxxxxx>
>  >>
>  >>Hi Paul,
>  >>           Whatever rods you purchase for the core, they have to
>  have >>a very small x-sectional area. They should also not retain
>  much if >>any magnetism after being de-energized (check with a
>  magnet) or they >>will have large hysteresis losses resulting in lots
>  of heating. >>Silicon steel such as used in transformer cores is
>  preferred if you >>can get them. >> >>Malcolm > > > >
>
>
>