Return-Path: Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 756615 for flyrotary@lancaironline.net; Wed, 23 Feb 2005 17:58:01 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.67; envelope-from=sqpilot@bellsouth.net Received: from [209.214.45.56] by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050223225714.OLJG2072.imf19aec.mail.bellsouth.net@[209.214.45.56]> for ; Wed, 23 Feb 2005 17:57:14 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [266.4.0]); Wed, 23 Feb 2005 16:57:09 -0600 Message-ID: <007001c519fb$000d3b40$382dd6d1@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Motorcycle generators Date: Wed, 23 Feb 2005 16:57:07 -0600 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=======AVGMAIL-421D0A453241=======" --=======AVGMAIL-421D0A453241======= Content-Type: multipart/alternative; boundary="----=_NextPart_000_006D_01C519C8.B553D190" ------=_NextPart_000_006D_01C519C8.B553D190 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable I think I am getting to really like this guy Bill Dube. If he can build = a voltage regulator to do what we need, he would definately be the hero = of the week. Paul Conner ----- Original Message -----=20 From: Bill Dube=20 To: Rotary motors in aircraft=20 Sent: Wednesday, February 23, 2005 10:45 AM Subject: [FlyRotary] Re: Motorcycle generators We should not overlook the disadvantage of PM alternators. At = higher operating speed, the not used output will have to be dissipated. = This is the main reason why automotive alternators are regulated by the = exitation system.=20 FWIW. If you select a shunt regulator, you are correct, but you = don't have to use a shunt regulator. You can use a switching "buck" = regulator. As long as the raw stator output voltage does not become = "insane", like 600 volts, a switching regulator should work just fine. They have a 40A unit. The hole in the rotor is sized for a 1", 10 = spline shaft. That matches the shaft from my sun gear exactly. Now the = only question is if there is enough room on the spline with the PSRU = installed for the rotor to fit between the flexplate and gearbox = housing. The generator is only 1" high, so I don't think that is a = problem. It is rated for 2800RPM, but it is a small thing to rewrap the = coils to give more current and less voltage. No need to alter the coils. (This is a lot of work.) If the = rotor will stand 6000 RPM, then the alternator will work just fine. The = standard voltage regulator that comes with it might not like the extra = input voltage, however. It is no big deal to (for me) to build a voltage = regulator to take higher input voltage, if this turns out to be a = problem. >> Homepage: http://www.flyrotary.com/ >> Archive: = http://lancaironline.net/lists/flyrotary/List.html-----------------------= -------------------------------------------------------No virus found in = this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.4.0 - Release Date: 2/22/2005 ------=_NextPart_000_006D_01C519C8.B553D190 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable

I think I am getting to really like = this guy Bill=20 Dube. If he can build a voltage regulator to do what we need, he = would=20 definately be the hero of the week. Paul Conner

----- Original Message -----
From:=20 Bill = Dube=20
To: Rotary motors in = aircraft

Sent: Wednesday, February 23, = 2005 10:45=20 AM

Subject: [FlyRotary] Re: = Motorcycle=20 generators

We should not overlook the = disadvantage of PM=20 alternators. At higher operating speed, the not used output will = have to=20 be dissipated. This is the main reason why automotive alternators = are=20 regulated by the exitation system.

FWIW.
=

If=20 you select a shunt regulator, you are correct, but you don't have to = use a=20 shunt regulator. You can use a switching "buck" regulator. As long as = the raw=20 stator output voltage does not become "insane", like 600 volts, a = switching=20 regulator should work just fine.

They have a 40A = unit. The=20 hole in the rotor is sized for a 1", 10 spline shaft. That = matches the=20 shaft from my sun gear exactly. Now the only question is if = there is=20 enough room on the spline with the PSRU installed for the rotor to = fit=20 between the flexplate and gearbox housing. The generator is = only 1"=20 high, so I don't think that is a problem. It is rated for = 2800RPM, but=20 it is a small thing to rewrap the coils to give more current and = less=20 = voltage.

= ; No=20 need to alter the coils. (This is a lot of work.) If the rotor will = stand 6000=20 RPM, then the alternator will work just fine. The standard voltage = regulator=20 that comes with it might not like the extra input voltage, however. It = is no=20 big deal to (for me) to build a voltage regulator to take higher input = voltage, if this turns out to be a problem.

>> Homepage: http://www.flyrotary.com/ >> Archive: = http://lancaironline.net/lists/flyrotary/List.html
No virus = found in this incoming message.
Checked by AVG Anti-Virus.
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