Re: [EVDL] Ultra small/light ev-- what motor-battery-controller combination?
My Gizmo was originally 993lbs with a 48V pack of 6V lead acid
batteries. It came with a D&D Motors ES-10C motor which is 6.7" dia
and about 11" long. For town running this did fine but the motor was
too small for my regular hill climb home and when I went to a 64V
LiFePO4 pack it did much better. The only problem was that while the
motor could push the Gizmo at 50mph it still got a little too hot even
with a cooling blower. The new weight was 829lbs. I have since had to
replace it with a D&D Motors ES-32 mod-15 motor which is about 1.5"
longer, all in the armature. This motor does much better and I have
gotten it to push my Gizmo at 60mph but that is still too much for
this motor. The 180=B0C snap switch in the brush holder will close after
a short run at this speed. I found that if I limit the power out of
the battery pack to about 8.5kW that the motor does fine. Based on
this I would think you would want a larger motor than mine. Maybe an
8" and likely one with double brushes.
On Thu, Aug 16, 2012 at 2:44 PM, L. Chris Hager
> I've recently acquired a little 1959 Berkeley, a tiny English 2-seat spo=
rts car (yeah, google it- use the club name BEC to avoid new and used car d=
ealers in Berekeley CA!) that came with a 328 cc motorcycle motor (mounted =
forward of the front axles), making only about 20 hp. But it weighs in at j=
ust 680 pounds (add gas and the driver-- and maybe a passenger)! It would p=
robably do well as an electric, as weight is the enemy of ev's. SO: I'm lo=
oking for advice from anyone who has done a conversion on a smell vehicle t=
hat might give a hint as to what motor, voltage, and controller combination=
might be good. Maybe someone who's done a 3-wheeler or larger motorcycle.=
With the original motor and gas tank out, a Berk weighs about 600 lb, and =
I would probably use lithium cells (Thundersky or similar)-- anything to av=
oid the weight of lead-acids. Even 200 lb of Li batteries would still give=
a finished car under 850 lb --and if I can lose a little weight
> myself, the package might come in under 1000 with me on board! SO: IF i=
t were YOURS, what motor/controller combination would YOU chose and how man=
y cells? Assumes moderate range target (60-80 mi), top speed (60-80 mph) a=
nd no outrageous acceleration required. -Chris H, near DC
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David D. Nelson
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