From: Steve & Jeanne Keith (cckw@attbi.com)
Date: Tue Jan 07 2003 - 13:14:22 PST
With the 24v alternator:
As the alternator generates AC as opposed to DC (the DC for the output is
created by rectifying the AC with 6 diodes), you could tap into the AC
before the diodes and run it through a 2:1 transformer (prolly have to use
an audio transformer due to the frequency changes with engine RPMs) and
rectify the output and have something close to 12v DC.
Conversly, you could take the 12v alternator and use the transformer the
other way 1:2 and get 24 volts
Steve AKA Dr Deuce
----- Original Message -----
From: "Bjorn Brandstedt" <super_deuce@hotmail.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Tuesday, January 07, 2003 3:20 PM
Subject: Re: [MV] 24vdc from 12vdc 6.5L turbo-diesel with airconditioning...
> Someone should make a dual alternator, where two separte 12-volt units are
> housed within the same case, isolated from each other and driven from the
> same pulley. This way we could all easily convert to a near perfect dual
> charging system and have 12 and 24 volts available.
>
> Bjorn
>
>
>
>
>
>
>
> >From: tom-nooneofconsequence <milveh@carr.org>
> >To: <mil-veh@mil-veh.org> (Military Vehicles Mailing List)
> >Subject: Re: [MV] 24vdc from 12vdc 6.5L turbo-diesel with
> >airconditioning...
> >Date: Tue, 07 Jan 2003 12:14:14 -0500
> >
> >dave is quite right. probably the best way to get 24 v on a 12 v vehicle
> >is with the system used on the cucv's. with two separate 12 alternators,
> >and two batteries, the system will always be balanced no matter which
> >battery you load. as to just pulling 12 v from the center on a 24 v
> >system, yes it will work. but it WILL overcharge the upper battery and
> >cause the lower battery to have a lower charge. how long will this last
> >until you notice a problem? maybe a year or more as in my case since
> >this is what i do for a clock and egt. if you routinely charge the
> >batteries separately then you will probably never notice a problem.
> >there is a device who's name eludes me right now that attaches across
> >both batteries and allows you to pull very high current loads from 12 v
> >without unbalancing the charging, but they are very expensive.
> >tom
> >
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