tobewankenobi
10 mW
- Joined
- Jan 2, 2014
- Messages
- 28
very good thread, i ve been thinking about using the frame and suspension from an old mx bike to build an ebike. I wonder thought if the torque is enough when installing the motor in the wheel. How much power can the motor/controller you've installed deliver at 3m/s?
I assume:
Adhesion = 1.0
Weight on backwheel = 100kg
Max effort = 100*9.81*1.0 = 0.98kN
Required power at 3m/s = 0.98*3 = 2.94kW
Wheel diameter = 0.6m
Rpm of wheel at 3m/s = 3/(0.6*pi)*60 = 96rpm
Required torque = 2.94/(96/60*2*pi) = 0.29kNm = 290Nm
Ive found a 3kW motor at eBay but it only produce 92Nm. It means I cannot utlize the adhesion and the wheel is stronger the motor. Is the cromotor stronger, or the 54**?
I assume:
Adhesion = 1.0
Weight on backwheel = 100kg
Max effort = 100*9.81*1.0 = 0.98kN
Required power at 3m/s = 0.98*3 = 2.94kW
Wheel diameter = 0.6m
Rpm of wheel at 3m/s = 3/(0.6*pi)*60 = 96rpm
Required torque = 2.94/(96/60*2*pi) = 0.29kNm = 290Nm
Ive found a 3kW motor at eBay but it only produce 92Nm. It means I cannot utlize the adhesion and the wheel is stronger the motor. Is the cromotor stronger, or the 54**?