Ianhill said:
Top speed run 48.4mph
Took the scooter for a short run today I only charged the cells to 3.95v I didn't want to be riding around for too long the sun was going down and the temps drop off fast. I got 48.4mph on the quick blast after the battery warmed up a bit.
I'm thinking of my next project now I want to go a fair bit faster I don't think a scooter can take me there so I'm going to use my solid tail mountain bike with triple tree forks remove the crank and pedals and replace with a boma motor rewired for lowered kV and encapsulated, 120v Bluetooth controller and 28s of 10000mah lipo still over 1kwh capacity, I'll aim for 7kw bursts and cruising speed of 30mph and top out over 60mph if the recipe is just rite.
Hey Ian...I didn't see you had a thread before...don't know why. Oh well.
Your scooter is coming along nicely. Nearly 50mph down hill...not bad. I was wondering why you didn't pass that car sooner. LOL. I don't think I would want to try for 60mph on those knobby tires, but on street tires...yeah for sure..oh wait...I have on a my scooter. On yours with those smaller tires...that might be really interesting. I'm expecting 50mph on my Currie on level ground with the 80-100 outrunner. Should be fun!
Regarding the BOMA, you can see part of why I didn't rewind the burned out one I have. I saw those jigsaw puzzle stators and thought that it would be a problem. I'll still rewind it...eventually and I'll use several 32 awg strands. My thinking is based on several things. Tiny strands are uber flexible so winding an inrunner should go easier with smaller awg wire. Also , the skin effect issue, but also, I should be able to get a bit more copper on each tooth since the wires will lay flatter.
Regarding your motor stutter issue...
I have 3 BOMA motors and never had that problem on my Kelly controller. I ran all of them on 82 volts so my RPMs were much higher than yours are at 60 volts. I think you have some other problem...like the controller is too slow to keep up or flaky halls or RF noise that is interfering with proper hall reading.