Return-Path: Received: from rly-da03.mx.aol.com (rly-da03.mail.aol.com [172.19.129.77]) by air-da09.mail.aol.com (v124.15) with ESMTP id MAILINDA091-a5c4a5ddb30da; Wed, 15 Jul 2009 09:36:01 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da03.mx.aol.com (v124.15) with ESMTP id MAILRELAYINDA034-a5c4a5ddb30da; Wed, 15 Jul 2009 09:35:46 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MR4dF-0006LJ-UC for rs_out_1@blacksheep.org; Wed, 15 Jul 2009 14:34:49 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MR4dF-0006LA-FQ for rsgb_lf_group@blacksheep.org; Wed, 15 Jul 2009 14:34:49 +0100 Received: from ttsmtp-4.cpwnetworks.com ([62.24.128.245] helo=ttsmtp.cpwnetworks.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MR4dC-0006QS-Av for rsgb_lf_group@blacksheep.org; Wed, 15 Jul 2009 14:34:48 +0100 X-Path: TalkTalk-smtp X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApoEAP52XUpZ8ivc/2dsb2JhbADQd4QJBQ Received: from unknown (HELO TraceyPC) ([89.242.43.220]) by ttsmtp.cpwnetworks.com with SMTP; 15 Jul 2009 14:33:39 +0100 Message-ID: <39B0A379B1804734A817CDA9E9377A13@TraceyPC> From: "Tracey Gardner" To: References: <1EDB89E6D3E24E008B4897CFE896A09F@lindavideo> <4A5DD4CB.8020109@usa.net> In-Reply-To: <4A5DD4CB.8020109@usa.net> Date: Wed, 15 Jul 2009 14:33:21 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6001.18000 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Microwave oven transformers Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 >From a Wiki, Magnetic shunts can be used to limit current or regulate voltage. This regulation is accomplished by inserting a ferrous magnetic shunt into the transformer core, such that the magnetic flux from the primary winding has an alternate (although high impedance) path around the secondary winding. As the current draw on the transformer secondary winding increases, more primary magnetic flux diverts through the magnetic shunt. Selecting different materials with suitable saturation characteristics it is possible to make transformers with a range of regulation functions. Also in microwave oven transformers - small magnetic shunts provide enough leakage inductance to resonate the doubler capacitor 73s Tracey G5VU > > Just out of curiosity, what is the purpose of those magnetic shunts when > the > microwave oven transformers are used for their intended application ? > > 73 Alberto I2PHD > >