[ausev] VW FOX CONVERSION, GEAR RATIO QUESTION
chris at chrisrobison.org
Thu Jun 12 10:24:42 GMT 2008
> My bad. There are 4 brushes, 10 separators between each brush. So around 350 volts sounds right.
My Warp13 is similar; it's also rated at 336V on the nameplate. Does
yours show a voltage rating?
> The motor is equiped with interpoles. To my understanding, it will not arc, and doesn't need the brushes moved.
Correct, it won't arc, though I'm not sure whether or not there's still
an advantage to having advanced timing for better performance at higher
RPM. Can someone else weigh in on that? I believe that interpoles do
give better high-speed performance, at the expense of torque (smaller
main field windings to make room for the interpoles).
The need for interpoles or movable brushes is one of the things that
makes regenerative braking difficult with series DC motors. If you had a
regen-capable controller like a Zapi, this would be an ideal motor to
pair it with.
> Do you know where I could find taperlock connectors for the motor and transmission? Maybe the machine shop could fabercate them.
We've been using key-and-setscrew style hubs without any problems; these
are a single piece and so are going to be easier and cheaper to have
made. It seems to be the general consensus among racers that taperlock
hubs are better for extreme torque applications, but I don't think
you'll be producing enough torque at 1000A to create a problem. I don't
think a taperlock hub would be a bad idea, but it is a bit of a pain to
reposition once it's been tightened.
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