Electric Scooter Transmission
Electric Scooter Transmission
(OP)
We are a group of students working on a corporate project developing an electric scooter. We have been working on the system, but are having problems finalizing the exact ratios of gears. This is because of the problem we are facing in calculating the exact torques required at various driving conditions. We would be happy if someone could throw light on how to calculate the torques required for a scooter when the scooter is under development.
Hope to hear from someone soon.
Hope to hear from someone soon.





RE: Electric Scooter Transmission
Your big problems are 4 fold
1) determining the rolling resistance of your tyre. The manufacturer may be able to help, or you could measure it yourself (I recommend this, it is amazing what you learn). We used a large cylinder of steel, of the corect weight, and two wheels, rolling down a ramp and onto a level surface.
2) determining your air resistance - may or may not be important for your speeds - should be plenty of estimates of Cd around for a bike. 1 would be a good start
3) what gradients do you need to climb, at what speed?
4) the efficiency of your gearbox.
Cheers
Greg Locock
RE: Electric Scooter Transmission