Re: [Amc-list] ELECTRO-RAMBLER =revisited=

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Wrambler242@xxxxxxxxxxx
" 
" I stumbled on the website that the guy has who built the 4X4 XJ EV. Url is at work. Google should be able to find it, try EV Jeep or somethignt o that effect.
" Anyway, he says that electric DC motors get the best "economy" by running at their rated rpm.

i think he's talking through his hat.  electric motor -efficiency- is
not dependent on speed.

it may be true of -his- installation, but he's made choices limiting
his flexibility.  maybe even some choices he's not aware of, imho.

" If you think about it lugging an electric causes a need to increase the amperage to maintain rpm.

you mean overloading it, demanding more hp?  that takes more current
at any speed.

" So a 4 speed non OD trans would in fact be a fairly good tool to allow one to be able to keep the motor at the "sweet" spot.

electric motors [with electronic controllers] don't have a sweet spot,
unlike internal combustion engines.  they usually have constant torque
[within thermal limits] up to a certain speed, then constant hp above
that.  if he's not getting that, he's not getting everything he could
out of his motor.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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