Re: (ET) voltage

[SteveS <stevesgroups verizon net>]

I imagine the designers first decided on a  battery. 6V golf cart 
batteries are a pretty obvious choice, easy to get, proven in the field, 
fairly easy to take of, relatively inexpensive. Next how long does it 
need to run? Then you figure how many watt--hours from that and that 
determines how many batteries. More than 6 batteries is getting a bit 
too heavy and hard to find room for. More than 48V starts to present a 
shock hazard. In addition most golf carts (at least then) were 36V so 
the motors, relays, contactors, etc were all well designed and proven. 
If you used less volts (say, put batteries in parallel) you need 
proportionately higher amps, meaning bigger wires, connectors, and 
contactors.

- SteveS

matt wrote:
> On these tractors they ran on 36 volts. Why not 12? Why not 48? Some of the
> other things I see run on a lot more. Why more? Other then last longer?
> Thanks guys n gals.
> Matthew P. Magda Jr.
>
>
> _______________________________________________
> Elec-trak mailing list
> Elec-trak cosmos phy tufts edu
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG. 
> Version: 8.0.100 / Virus Database: 270.4.0/1507 - Release Date: 6/18/2008 7:09 AM
>