From: D O (dohe69@hotmail.com)
Date: Mon Oct 18 2004 - 05:06:29 PDT
I made a 12v dc "generator" out of a 3.5 hp Briggs vertical shaft lawnmower
and a 55 amp Delco alternator. It is not capable of putting out the max
rated amps of the alternator, it bogs the motor down above approximately 30
amps or so (estimate, didnt have an accurate way to measure). Of course the
mower was a garbage pick, and is probably too tired to put out the full 3.5
hp.
>From: "noel shelley" <noel@shelley1722.freeserve.co.uk>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] WTB: 24 VDC power supply
>Date: Fri, 15 Oct 2004 10:04:40 +0100
>
>. An old deuce generator and a 1 horse AC motor?
>
>Simple maths :- 24vX50a = 1200 Watts 750 W = 1Hp
>
>allow poor conversion factor for this arrangement , friction , heat losses,
>Etc SO use a 2.2 Kw {3 Hp } motor for this application .
>The belt ratio will ,for a 1500 rpm motor need to be around 4-5 to 1
>
>The idea works well , I`ve done this .
>
>BUT NEVER run an alternator without some load as you will instantly fry the
>regulator . The batteries hold down the voltage , without them , it goes
>off
>the scale .
>
> Noel
>
>
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