What kind of motors are you using?
Glenn Brooks via EV wrote:
So far experimenting with used 7” diameter 24v forklift motors.
If it's a forklift motor, it's almost certain to be series DC. That's
actually a good choice for your application. They have very high
starting torque, to get a heavy train moving without excessive battery
current.
However just brought one home and the inspection plate shows less
than half the Kw rating than what the guy told me.
The KW rating on the nameplate of an electric motor is very
conservative. Unless it says otherwise, it's generally the
continuous-duty rating. The peak-power rating is several times higher.
Also, sellers chronically exaggerate the horsepower. Go by weight.
Electric motors are a mature technology, so the continuous-duty and
peak-power ratings are closely comparable between motors of the same weight.
Would like to work with a 5-7 Kw motor if possible.
At that level, a 24v or 36v golf cart motor will be fine. These are very
common. Just be sure to get one that has bearings at *both* ends; many
depend on the second bearing to be in the mating gearbox.
I’ll check out the older version of the Curtis. I will likely need
to run several motors and controllers off one speed control.
With series motors, there's no need to use more than one controller.
Just wire the motors in parallel to the same controller.
Lee Hart
--
A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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