pendragon8000
100 kW
Update:
https://www.facebook.com/MakeTechPTYLTD
Hi all. Ive made 2 DD hub motor ebikes and decided I'd have a go at RC mid drive. I ummed and erred about it but then i saw the electricbike write up about it and was inspired when i saw this pic:
As i hade a couple head sets/stems spare already I droped into CBC bearings near my place and grabed some high rpm rated sealed Japan made bearings $7 each and put them in to see how it looks, then made a shim and cut the head set so I could mount it on the frame.
OK, how about i just continue with a YT vid...
[youtube]dGuGCo7Zg_Q[/youtube]
*Turningy SK3 6374 149kv
*sentilon controler
*Arduino Nano to drive throttle signal to controller (input-throttle, rpm, thermistor , accelerometor and battery voltage)
xl timming belt 10mm wide 20t-50t
219 chain 9t-64t
top speed expected 30kph with relitevely high acceleration around 10-15 kph considering the total mass.
arduino code to go here:
---------
variables
throttle_min=10
throttle_max=170
current_0=readpin(current_pin)
current_lim=4
regen=0
upramp= 8 // degrees per 10mS
do
pin(throttle_out_pin) = throttle_out
if ebrake = 1 then throttle_out = regen
if ebrake = 0 then throttle_out = 0
if throttle_in<throttle_out then
throttle_out=throttle_in
end if
if current_in>current_lim then
throttle_out=throttle_out-int(sqrt(current_in-current_lim))-1
loop
end if
if milliseconds()=>10 then
fast_ramp=0
if speed/6000-.2 > throttle_in/180 then fast_ramp=18
if throttle_out>throttle_in then throttle_out=throttle_out+upramp+fast_ramp
t=time
end if
loop
------- (need to convert from basic to arduino, easy)
that obvoisly need work, I just thre that together just now of the top.