Talk:Litz wire

From Wikipedia, the free encyclopedia

	It is requested that a photograph or photographs be included in this article to improve its quality.
	The Free Image Search Tool (FIST) may be able to locate suitable images on Flickr and other web sites.

Contents 1 Litz Wire is not Twisted 2 Gobbledegook? 3 Graph 4 Recent edits 4.1 The Terman expression

[edit] Litz Wire is not Twisted

Twisting wires together does not have the same effect. It is important that a wire be on the outside of the cable for a small distance but also be in the center of the cable for a small distance. Just twisting a bunch of wires together would keep a small number on the outside of the bunch and not significantly improve the high frequency conductivity. —Preceding unsigned comment added by Glrx (talk • contribs) 22:37, 4 December 2007 (UTC)

It's certainly true that simply twisted bundles have the problem you describe. However, to me, weaving implies something like braiding, in which the strands are interlocked in some way, rather than the multi-level twisting schemes used in most litz wire, as illustrated for example in the New England Wire Catalog on the page after this page (The URL for the page I wanted was too long). Some of that was explained, albeit poorly, in the text you deleted. I'm tempted to revert, but will wait until I have time to try to make it a little better. Note that truly braided or woven litz wire is used--it's just less common than multi-level twisted wire. Ccrrccrr (talk) 02:22, 5 December 2007 (UTC)

[edit] Gobbledegook?

Anyone care to guess what this means?

Litz wire is one kind of stranded wire, but in this case possible material fatigue with its associated danger of complete wire breakage is not a reason for its use.

--Light current 02:45, 13 January 2006 (UTC)

They mean it's not braided in order to take a tensile load like a multiple element steel cable is. MJ Brinkmann 21 June 2006

They're saying that stranded wire is often selected for applications where material fatigue would be an issue; but with Litz wire, stranded wire is selected to increase conductor surface area.

[edit] Graph

A chart or graph showing the effective conductor size or relative ampacities as a function of frequency might be helpful. I haven't been able to find anything like that on line, though. Maybe the people who edit the Skin effect page might know where to look? --W0lfie 22:49, 18 January 2007 (UTC)

[edit] Recent edits

Two other problems with the recent edits:

• The intro describes skin effect in detail but says little about litz wire. It would be better to describe litz wire in the intro and link to the article on skin effect.
• Terman expression: Pointless to provide that formula without enough detail for anyone to use the formula. It would be better to just say "Terman provides a formula but it's too complicated to present here.

Ccrrccrr (talk) 03:56, 5 December 2007 (UTC)

[edit] The Terman expression

The formula is not widely available because the reference and its citations are very old. It does little good to point to an expression that is almost impossible to find. The provided expression covered the desirable operating range of litz wire.