Return-Path: Received: from imo-m24.mx.aol.com ([64.12.137.5] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 758594 for flyrotary@lancaironline.net; Fri, 25 Feb 2005 00:56:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.5; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m24.mx.aol.com (mail_out_v37_r3.8.) id q.9b.59fe7ebb (25711) for ; Fri, 25 Feb 2005 00:55:31 -0500 (EST) From: WRJJRS@aol.com Message-ID: <9b.59fe7ebb.2f5017d3@aol.com> Date: Fri, 25 Feb 2005 00:55:31 EST Subject: Re: [FlyRotary] Re: Racemate alt/water pump To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1109310930" X-Mailer: 9.0 SE for Windows sub 5005 -------------------------------1109310930 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 2/24/2005 8:09:51 PM Pacific Standard Time, finn.lassen@verizon.net writes: The envisioned PM generator would have which possible mechanical failure modes? Finn Finn, I am sure you know this but the pm ALTERNATOR is just that, an alternator. There are no brushes since there is no excitiation coil. There is just the diode pack and the regulator. You might get a coil failure sometime but it is unlikely. You can blow a diode just like a standard alternator, and the silicon in the regulator could fail. The failure mode of those items follows the typical bathtub curve, most likely in the first few hours or way down the line. Bill Jepson -------------------------------1109310930 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 2/24/2005 8:09:51 PM Pacific Standard Time,=20 finn.lassen@verizon.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>The=20 envisioned PM generator would have which possible mechanical failure=20 modes?

Finn
Finn, I am sure you know this but the pm ALTERNATOR is just that, an=20 alternator. There are no brushes since there is no excitiation coil. There i= s=20 just the diode pack and the regulator. You might get a coil failure sometime= but=20 it is unlikely. You can blow a diode just like a standard alternator, and th= e=20 silicon in the regulator could fail. The failure mode of those items follows= the=20 typical bathtub curve, most likely in the first few hours or way down the=20 line.
Bill Jepson
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