Week-11 Challenge: Braking
1 answer :
1.created drive cycle using Breakingenergy excel file.
2.if future velocity is more than present velocity then vehicle is accelerating.so vehicle needs positive kinetic energy.
3.if future velocity is less than present velocity then vehicle is decelerating.so vehicle needs negative kinetic energy ie breaking energy.
4.at every instant positive or negative kinetic energy is calculated in excel file.
5.imported this excel file into matlab lab workspace and dragged this Breakingenergy file from workspace into current folder in matlab and saved as Breakingenergy.mat file.
6.opened one new script file and named it as Breakingenergy.mfile .in this code was written to find at which instant kinetic energy requirement is negative(breaking energy).taken absolute of this and plotted with respect to time.
script file after running
blue is velocity and red is breaking energy
2 answer :
1.peak torque at high speed is less than peak torque at lower speeds.so decelerating torque by motor at
high speeds will be less than accelerating torque at low speeds.at low speeds torque supplied by motor is maximum and it is constant torque region.at high speeds motor is operated in constant power region.in this high speed region motor cannot give high forward motor braking torque
2.there are series and parallel types of brakings.in series braking mechanical and electrical breaking are applied one after another where as in parallel breaking both electrical and mechanical brakes are applied simultaneously.
3 answer:
