Hi cocoon, thank you for your support !
God I realize I haven't updated this thread in ages.
I'm curious to see which solution you came with, and also which layout / wheel sizes you're going to use ? Will it be a 1WD ? Stator directly mounted on the frame may be a nice solution to dissipate heat, but your frame needs to be strong ! Will it be remote or remoteless ? Did you settle already for a battery ?
When you mean 4,4kg, do you talk about weight or torque? I look forward to learn more about it !
I've kept working on my skates pretty much continuously for the past years and damn there were (somewhat still are) challenges. Should update here ASAP
motor will bi similar like this. https://www.youtube.com/watch?v=JkwLpAAfBVI
But i will have rod magnets in the wheel hub and coils outside. Magnets are neodium 10mm x 20 mm. Magnetic force 4,4 kg. I will have 2 C shaped coils (they work like 4 coils) driven by hall sensors and arduino. If my calculations are right motor will have high amout of torque.
One coil force at 4mm from iron (magnet) is 156.008(Lbs),
wheels are 110mm. Skates are https://goo.gl/images/Rkw4YA
(i got them cheap from my brother
For test there will be only 1wd per skate, but system is upgradable. First i must find out if this works at all
. This weak i will assable it and put it on test bench.
Im playing with idea for long time but project is in beggining phase, so i dont have all details figured yet. But with arduino controller posibilities are not limited.
For battery im leaning towards battery backpack. I dont like skates to be heavy. 10 Ah 36V should be ok for start.
Please update your progress
did you already drive on them?