X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from pan.gwi.net ([207.5.128.165] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTPS id 2876178 for flyrotary@lancaironline.net; Mon, 28 Apr 2008 21:42:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.5.128.165; envelope-from=silvius@gwi.net Received: from yourlk4rlmsu41 (bb-216-195-174-159.gwi.net [216.195.174.159]) by pan.gwi.net (8.13.1/8.13.1) with SMTP id m3T1fRFT074606 for ; Mon, 28 Apr 2008 21:41:30 -0400 (EDT) (envelope-from silvius@gwi.net) Message-ID: <00b401c8a9a2$831078b0$9faec3d8@yourlk4rlmsu41> From: "Michael Silvius" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: the Kubota dynamo Date: Mon, 28 Apr 2008 21:41:20 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1807 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1807 But will that sort of regulator work on a Permanent magnet (dynamo) device? It is my limited understanding that for a dynamo the heat sink regulator is the only way? Not challenging you here, just seeking to be educated in the obscure wizardry of electrons. Michael in rainy Maine > > SHIPCHIEF@aol.com wrote: > > A more modern method is to put a solid-state switch in the circuit. If > > the generator puts too much voltage out, cut the circuit then bring it > > back online when the regulator output drops. The regulator switches > > (hence the name "switching regulator") at a rate high enough that the > > regulator appears to be stabilized around the set voltage. > > > > The heat sink method is good enough when the engine rpm and loads are > > characterized well enough for the more sophisticated electronics to not be > > needed.