Return-Path: Received: (qmail 10803 invoked from network); 5 Apr 2002 16:14:54 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 5 Apr 2002 16:14:54 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 18311 invoked from network); 5 Apr 2002 16:14:56 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 5 Apr 2002 16:14:56 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16tXpF-0004Gy-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 05 Apr 2002 18:48:37 +0100 Received: from astral.infomsk.ru ([212.164.44.2] helo=astral.omskcity.com) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16tXpE-0004Gt-00 for rsgb_lf_group@blacksheep.org; Fri, 05 Apr 2002 18:48:36 +0100 Received: from fitec.omskcity.com (mu06.dialup2.infomsk.ru [212.164.44.118]) by astral.omskcity.com (8.9.3/8.9.3) with SMTP id XAA3cadcbd56ba5 for ; Fri, 5 Apr 2002 23:07:49 +0700 (OSS) Date: Fri, 5 Apr 2002 23:47:10 +0000 (GMT) From: "Alexander S. Yurkov" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: still more loop inductance formulas In-reply-to: <3.0.1.16.20020405160954.2c2fc068@pb623250.kuleuven.be> Message-ID: 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: Hello, Ric. On Fri, 5 Apr 2002, Rik Strobbe wrote: > But after some 'playing' with simulation software and calcuations it turned > out that there might be a more accurate and simpler formula to calculate > the inductance of a big loop : > > L = 0.8*B*(ln(A/d)+6.82) > where L = loop inductance in uH, A = loop height in m, B = loop length in m > and d = wire diamater in mm > > At first sight there seems no (practical) limits to the A/B ratio. By integrating magnetic field of wires I have derived formula for rectangular loop. It seems bit complex, but there is no limits to A/B indeed. After some test (I want to derive it again to avoid mistakes) I'll sent it to Your. 73 de RA9MB/Alex http://www.qsl.net/ra9mb