RE: (ET) Re: JohnDeereHybrid

["Markus Lorch" <mlorch vt edu>]

Dan,

you are right that a battery powered solution today won't 
easily last a full work shift. (Maybe or the heavier tractors
that can afford more battery weight, see fork lifts)
 
However, the tractor they choose to convert is targeted at
the home owner, who has 1-4 acres to mow, which is within 
reach of a battery powered solution. 

They do have a "ePower" program, which does more of this
kind of research, see:
http://www.deere.com/en_US/compinfo/envtsafety/innovation/ePower/index.html
Mostly for the larger vehicles, like the gator - where it
makes more sense I think. 

Markus

> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu 
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of 
> Dan Conine
> Sent: Thursday, July 08, 2004 7:54 AM
> To: elec-trak cosmos phy tufts edu
> Subject: (ET) Re: JohnDeereHybrid
> 
> 
> Perhaps, as I have, they were thinking in terms of the 
> current state of 
> the art, which is hydrostatic tractors. Hydraulic drive systems are 
> inherently inefficient because of friction and fluid losses, 
> and noisy 
> and expensive to repair. Using electricity to transfer power gives 
> better control, more options for traction, remote, and 
> computer control, 
> and the ability to recover a little of your used energy in 
> braking. (Not 
> much in most traction applications, though, since the implement will 
> usually stop the tractor.)
> 
> Bottom line is: Batteries are nice, but they aren't going to run a 
> professional landscaper's machine all day. Future use of instant 
> recharge, zinc-air refill, fuel cells, blacklight power, etc, might 
> prove out, and until then, the hybrid system lets development 
> of drives 
> and motors and chassis continue unabated.
> 
> Dan Conine
> E10
> E15
> 12V dirt bike
> 
> 
> >Message: 1
> >Date: Tue, 6 Jul 2004 14:28:33 -0400
> >From: "Markus Lorch" <mlorch vt edu>
> >Subject: (ET) John Deer Hybrid Electric Tractor Developed
> >To: <elec-trak cosmos phy tufts edu>
> >Message-ID: <000001c46387$0dcf7110$6500a8c0@Voyager>
> >Content-Type: text/plain;    charset="us-ascii"
> >
> >
> >http://www.electrifyingtimes.com/uqm_deere_hybrid_tractor.html
> >
> >If we could just order one of these without the
> >generator and the gas motor. 
> >
> >Look at the complicated ICE.
> >
> >Six 8V batteries would possibly fit in there nicely and be much less 
> >complex, .... what were they thinking?
> >
> >Markus
> >
> >
> >
> >
> >  
> >
> 
> 
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