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Re: (ET) 48v electrac
But I still wouldn't want to give an overvoltage, thus overcurrent, to a
30+ yr old machine full of relays. Am aware of 8V, some use them in
fullsize EV conversions where pack space is limited. With those, miles
per charge (assuming lead acid) is in proportion to battery weight. It's
a tradeoff.
I can not see the need of more HP in a GE/WH, especially with the
bigtime hills on my property proving that what power they got is
sufficient. Even a GE12 PM motor is sufficient here, if you shift the
tranny down to climb. a 16 with a field motor don't need that tranny
shift, just get into a field speed.
Another reason besides old parts;
More E will naturally force more RPM. That would force the flyball speed
governor inside the motor to limit the rpm with light loading, therefore
working all the time and defeating the 'more power with more voltage'
thought. That thing is not particularly a long lived sturdy part and
when these flyball governors cease function, balls usually fly off em
and get caught inside the motor locking it up. Have done 2 of em.
Luckily with both, there was no commutator or winding damage. On one,
there was a lot of magnet chipping but she worked all right when cleaned
up.
The fix is to remove the blasted thing completely, all parts of it, and
short it's wires. Only thing you lose is the power pulse switch function
(which was never much good anyway) and RPM limiting in case the belt
breaks.
Dave
Weymouth MA
On Fri, 03 Nov 2006 09:20:06 -0500 "Matthew callahan"
<callahanrc hotmail com> writes:
> Not necessarily, you could get trojan T-890's or something like
> those. They
> are 8 volt batteries with four cells instead of three, but the same
> size as
> a T-105 6V battery. So you wouldnt have to pack a extra two
> batteries, and
> have more HP, but range should be about the same in terms of lead
> weight.
>
> The Electric Ox is a 48V tractor, and i assume they use the 8V
> batteries.
> Some golf carts are now using the T-890's at 48 volts instead of 36,
> but
> retain the same battery tray design and set-up.
>
> Matt
>
>
> >From: David C Robie <mycroftxx1 juno com>
> >To: winfield100 yahoo com
> >CC: elec-trak cosmos5 phy tufts edu
> >Subject: Re: (ET) 48v electrac
> >Date: Fri, 3 Nov 2006 08:50:39 -0500
> >
> >
> >Why? You would need to carry 2 more batteries. They do fine on
> 36,
> >satisfy all who own them. You would be powering not only the 30+
> yr old
> >motor, but a bunch of 30+ year old relay coils (which tend to fry
> anyway
> >due to aging) with an overvoltage meaning higher current also. Same
> with
> >the powered accessories and the winch.
> >
> >Stick to the script in this category anyway. Your tractor witl
> thank
> >you.
> >
> >Dave
> >Weymouth MA
> >
> >
> >
> >On Fri, 3 Nov 2006 02:02:09 -0800 (PST) robert winfield
> ><winfield100 yahoo com> writes:
> > >
> > > will these run on 48v?
> > >
> > > --- Darryl McMahon <darryl econogics com> wrote:
> > >
> > > > David Roden (Akron OH USA) wrote:
> > > > > There is seldom much discussion here of what I
> > > > think is the best answer to
> > > > > ET charger problems : complete replacement with a
> > > > more modern, smarter
> > > > > charger, one that will treat the batteries more
> > > > kindly.
> > > >
> > > > Agreed.
> > > >
> > > > >
> > > > > The cheap solution is a used golf car charger.
> > > > They're too big to live on board
> > > > > the ET, though.
> > > > >
> > > > > There are plenty of smaller 36v chargers around
> > > > these days. A couple of
> > > > > examples follow :
> > > > >
> > > > > 1. I ran across these a while back and bookmarked
> > > > the site. Japlar/Schauer
> > > > > make (or perhaps import, who knows) a 36 volt, 20
> > > > amp 3-stage (IUIo)
> > > > > switchmode charger, quite small and light, priced
> > > > around $300 with cables.
> > > > > Voltage at 2.6vpc is a bit high, but they say you
> > > > can order them set to
> > > > > whatever voltage you want. It's made by
> > > > Japlar/Schauer. Schauer used to
> > > > > be a reputable brand - but who knows today, with
> > > > all the cheapening going
> > > > > on.
> > > > >
> > > > > http://www.battery-chargers.com./catalog/25.pdf
> > > > >
> > > > >
> > > >
> > > http://www.batterystuff.com/battery-chargers/brands/japlar-
> > > > > schauer/JAC3620M.html
> > > > >
> > > > > 2. Another possibility is the Interacter ICS-36
> > > > charger, with similar specs,
> > > > > except the Schauer is a universal input, and the
> > > > Interacter is 120v only or
> > > > > 240v only (by special order). Again, I have no
> > > > idea as to quality or durability.
> > > > >
> > > > > Other ideas welcome.
> > > >
> > > > Well, it would just be wrong if I didn't speak up
> > > > for the Soneil 3610SRF
> > > > at this point. It's been great for me and my E12,
> > > > and I will be
> > > > supplying one with the E12M I picked up near Albany
> > > > on Saturday for a
> > > > friend.
> > > >
> > > >
> > > http://www.soneil.com/Completesets/3610SRF(Rev04).25-May-05.pdf
> > > >
> > > > Disclosure: I am a distributor for Soneil chargers.
> > > >
> > > > Breaking NEWS! Soneil is introducing a line of high
> > > > power chargers. I
> > > > am currently waiting for spec sheets and pricing.
> > > > These include the
> > > > following 36 volt models:
> > > > 3620SR (10 amp constant current);
> > > > 3630SR (15 amp constant current);
> > > > 3640SR (20 amp constant current);
> > > > 3650SR (25 amp constant current); and, the
> > > > 3660SR (30 amp constant current).
> > > > The constant current value refers to the initial
> > > > bulk mode charging. I
> > > > expect these will the 3-stage chargers like other
> > > > Soneil models.
> > > >
> > > > For those that suspected the 3610SRF did not deliver
> > > > enough current, I
> > > > expect one of the new models should satisfy the
> > > > amp-addicts.
> > > >
> > > > There are also high power models for 12, 24 and 48
> > > > volt lead-acid systems.
> > > >
> > > > Darryl McMahon
> > > >
> > > > --
> > > > Darryl McMahon
> > > > http://www.econogics.com
> > > > It's your planet. If you won't look after it, who
> > > > will?
> > > >
> > > >
> > > > _______________________________________________
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> > > > Elec-trak cosmos phy tufts edu
> > > >
> > > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> > > >
> > >
> > >
> > > _______________________________________________
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> > >
> >
> >
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