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someone explain to me why overvoltage is needed for a permanent magnet
alternator. I thought they would be incapable of overvoltage since the
magnetic field is fixed.
Kevin Lane Portland, OR
e-mail-> n3773@comcast.net
web-> http://home.comcast.net/~n3773
(browse w/ internet explorer)
----- Original Message ----- From: "David Carter" <dcarter@datarecall.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, October 01, 2003 11:23 AM
Subject: [FlyRotary] PM Alternators was Re: [FlyRotary] Re: alternator
choice?
Here's a summary of John Deere PM alternators:
Output Amps Alternator P/N Regulator P/N Weight LBS
Remarks
20 AM877557 AM101406 4
35 AM877957 AM101406 4
?
Same device, with internal changes, Uses same Regulator
55 AL81436 AL65077
? Flat pack on back of alternator body Typically
used on 6400L and 6500L Tractor, for running at night with lights.
85 AL81437 AL65077
? Has Overvoltage protection, same P/N as 55amp
85 AL78690 ?
Listed for 6400 series tractor, NO overvoltage protection
David Carter
----- Original Message ----- From: "Marko Bewersdorff" <marko@bewersdorff.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, October 01, 2003 12:07 PM
Subject: [FlyRotary] Re: alternator choice?
> I have one of those permanent magnet deals on my Vari Eze, sold by B&C
for
> $$$ I keep hearing that they are of a Kubota tractor. Mine is only rated
at
> 14 A or there abouts so my night IFR is kinda like Apolo 13's return to
> earth - don't need strobes - don't need the VOR for a little while, etc.
> etc.
>
> Marko
>
> > -----Original Message-----
> > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> > Behalf Of Lehanover@aol.com
> >
> > I saw a permanent magnet alternator on a formula Atlantic car and
> > was told it
> > was rated at 20 amps. It was from a big garden tractor of some
> > kind. Smaller
> > than your fist. Running off of a 1/4" wide V belt.
> >
> > Lynn E. Hanover
> >
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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