Re: Space Winding - was What to look for...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

I assume that part of the effect is that when you close wind, the parts of
the wire directly adjacent to each other interact. The effect is identical
to that responsible for skin effect, that is, the current flow tends to want
to push away from other currents travelling in the same direction. I suspect
that if you looked at the current density in the close windings, the current
really flows on the inner and outer edges (relative to the center axis of
the coil) and not at the sides of the wire (and, of course, not in the
middle of the conductor).  Hmm...


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 14, 2001 6:35 AM
Subject: Re: Space Winding - was What to look for...


> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
>
> Hi John,
>
> Tesla list wrote:
>
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <FutureT-at-aol-dot-com>
>
> > One can use thinner wire for the spacewound coil, and keep the
> > inductance high, yet reduce the proximity effect.  According to
> > Terman and other experts, such a coil will show lower losses
> > than a closewound coil with thicker wire, both having the same number
> > of turns, and the same coil length.  A 50% to 70% wire "fill" factor
> > was deemed to be best.
> >
> > John Freau
>
> This is an interesting idea! I'm assuming the filler wire is wound without
any
> connection (simply a filler)?
>
> Bart
>
>
>