Hi,
I am doing a little research about electric motors in EVs and I am a bit confused about this:
As i find out:
max torque of Tesla roadster motor is 270 N*m,
the mass of vehicle is 1235 kg,
the acceleration 0-100 km/h is in 4 sec.
Using the formula M=F*R
I find out that the "pushing" forward force of motor is 675 N (the letter R in formula is radius of rotor, and I put 0.4 in it, although it is already TOO much but never mind)
After that I use formula F= m * a (mass times acceleration, which is 6.95 m/s^2)
I found out that to achieve this kind of acceleration the output force must be 8577 N.
IMHO these two formulas have equal solutions, doesn't it?
So the question is why they differ?
Thank you!
I am doing a little research about electric motors in EVs and I am a bit confused about this:
As i find out:
max torque of Tesla roadster motor is 270 N*m,
the mass of vehicle is 1235 kg,
the acceleration 0-100 km/h is in 4 sec.
Using the formula M=F*R
I find out that the "pushing" forward force of motor is 675 N (the letter R in formula is radius of rotor, and I put 0.4 in it, although it is already TOO much but never mind)
After that I use formula F= m * a (mass times acceleration, which is 6.95 m/s^2)
I found out that to achieve this kind of acceleration the output force must be 8577 N.
IMHO these two formulas have equal solutions, doesn't it?
So the question is why they differ?
Thank you!