Re: (ET) 48v electrac

[David C Robie <mycroftxx1 juno com>]

You got it, Matt.  There's a lot more to an ET than just the T.

Dave
Weymouth MA




On Fri, 03 Nov 2006 10:00:24 -0500 "Matthew callahan"
<callahanrc hotmail com> writes:
> 
> I am not as concerned about the relays and controller components 
> with a 48V 
> pack as i am about the motors on the various ET attachments;
> 
> A solid state DC to DC converter should be able to handle all 36V 
> control 
> components off the 48V pack.  The accessories would have to run off 
> the full 
> pack however, or with a power tap on 6 of 8 batteries (Which would 
> be a bad 
> idea due to the severe imbalance it would create).
> 
> Which accessories can run on 48V without a problem?  The blower, 
> tiller, and 
> the front mounted sweeper I presume?  How about the mower motors, 
> front 
> loader, forklifts leaf sweeper, or other accessories with a smaller 
> PM 
> motor?
> 
> Has anyone tried to attach a ET implement to the Electric Ox?  If 
> so, which 
> ones?  If not, why not?
> 
> Matt
> 
> >From: 
>
>"subscriptions aeolusdevelopment com"<subscriptions aeolusdevelopment co
m>
> >Reply-To: subscriptions aeolusdevelopment com
> >To: elec-trak cosmos phy tufts edu
> >Subject: Re: (ET) 48v electrac
> >Date: Fri, 3 Nov 2006 09:40:20 -0500
> >
> >Matthew callahan Wrote
> > >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.
> >
> >The OX does use 8V batteries.
> >
> >David's power objections though are valid.  You'll be dropping 1.8x 
> the
> >power loss in the relay coils.  That may not take much off of the 
> battery
> >life but it'll kill the relays.
> >
> >Other components will also show problems, it's possible some will 
> just fail
> >immediately.
> >
> >Robert
> >
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