Return-Path: Received: (qmail 3073 invoked from network); 12 Feb 2002 08:34:32 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by exhibition.plus.net with SMTP; 12 Feb 2002 08:34:32 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 11682 invoked from network); 12 Feb 2002 08:34:24 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys.services.quay.plus.net with SMTP; 12 Feb 2002 08:34:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16aYHy-0008AB-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Feb 2002 08:27:46 +0000 Received: from mail2.cc.kuleuven.ac.be ([134.58.10.50]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16aYHx-0008A6-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Feb 2002 08:27:45 +0000 Received: from LCBD15.fys.kuleuven.ac.be (LCBD15.fys.kuleuven.ac.be [134.58.80.15]) by mail2.cc.kuleuven.ac.be (8.12.1/8.12.1) with SMTP id g1C8QNlZ292084 for ; Tue, 12 Feb 2002 09:26:24 +0100 Message-ID: <3.0.1.16.20020212092231.2d07668a@pb623250.kuleuven.be> X-Sender: pb623250@pb623250.kuleuven.be X-Mailer: Windows Eudora Pro Version 3.0.1 (16) Date: Tue, 12 Feb 2002 09:22:31 To: rsgb_lf_group@blacksheep.org From: "Rik Strobbe" Subject: Re: LF: Need info on Litz wire In-reply-to: <004101c1b32f$f758a0a0$6a01a8c0@cianciolo> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >Could some please point me to a good explanation of how litz wire works? As frequency rises the current through a wire tends to flow only close to the surface, the so called skin-effect. On 136kHz the skin-depht is about 0.17mm (for copper-wire), so for any wire thicker than 0.35mm there will flow little or no current in the centre of a the wire. For that reason it is much better to use a number of thin wires in parallel instead on a single thick wire. Litz wire contains a number of thin wires that are isolated from each other, reducing the skin-effect and thus allowing to construct high-Q coils with a relative small diameter wire. If you want to know more or learn about the specifications have a look at : http://www.wiretron.com/litz.html 73, Rik ON7YD