Peter VanDerWal wrote:
> the resistance through the brushes on a moving comutator is different
> than on a stationary one
I have been wondering about this. Lets say I am driving in second
gear. When I first start my EV moving, the motor wants lots of amps.
Once it gets up to 4,000 rpms or so, the motor seems to have a limit on
its current draw, even if I put my foot on the floor (current well
under the current my batteries and controller can deliver). As soon as
I shift into 3rd, though, the motor will take all the current my poor
batteries and controller dish out. The only thing I could thing of was
that the resistance through the motor must change depending on rpms,
which because of Ohm's law would allow the motor greater current at
lower speeds. I know there are other factors involved, but do I have
any clue of what's going on? =)
Seth
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