[Lowfer] LitZ Wire Refernce Paper

Fri, 17 May 2002 22:25:22 -0700

Simple - a cross section of a solid wire with a given diameter is pure, 100%
copper.  A cross section of Litz wire is made up of copper strands and
insulation on each strand.  Therefore, there is less copper in the same
area.  A coil wound with Litz will have a higher dc resistance than one
wound with solid copper wire of same outer dimension, but the ac apparent
resistance will be lower due to skin effect of the current.  At high
frequencies current will flow in the outer surface of the wire only.  Depth
of current penetration gets worse as frequency goes up.  Litz wire is great
due to very high surface area of wire of a comparable size.

73s,

Don Davis   AD6PB

----- Original Message -----
From: "Michael Silvers" <[email protected]>
To: <[email protected]>
Sent: Friday, May 17, 2002 8:45 PM
Subject: Re: [Lowfer] LitZ Wire Refernce Paper

> Hi Tom & Group,
>
> TU, great site!  I haven't digested it all yet.  I'm
> still confused where it states:
> "The fraction of the window area occupied by copper in
> a litz-wire winding will be less than it could be with
> a solid-wire winding. This leads to higher dc
> resistance than that of a solid wire of the same
> outside diameter."
>
> 73 de Mike KB6WFC
>
> "To learn something new each day is half the cure for
> ignorance.
> The other half is to teach something new each day to
> others."
> - de N4YMK website
>
> --- Tom Rauch <[email protected]> wrote:
> > Here's the opening paragraph of the most
> > comprehensive paper I've
> > found on Litz wire:
> > You can download or view this paper at:
> >
> http://www.dartmouth.edu/~sullivan/litzwire/introduction.html
> >
>
>
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