(Solved): A motor coupled to a constant torque load accelerates from rest to a speed of 100ra(d)/(s) in 2 s wh ...
A motor coupled to a constant torque load accelerates from rest to a speed of
100ra(d)/(s)in 2 s while developing a starting torque of 600 Nm . The motor runs at constant speed for 20 minutes while developing a steady-state torque of 150 Nm and is then brought to rest in 3 s while developing a braking torque of 400 Nm . (a) Sketch the torque profile and the speed profile of the drive described above. (b) From the torque profile and the speed profile, derive and sketch the power profile of the drive. (c) Calculate the effective developed torque of the motor. (d) Calculate the energy the motor draws from the source when accelerating. (e) Calculate the energy the motor draws from the source in steady-state. (f) Calculate the braking energy. (g) Show in a well-labelled sketch how dynamic braking can be implemented.
