Читать книгу Analysis and Control of Electric Drives - Ned Mohan - Страница 65

1 2‐4 Consider the belt and pulley system in Fig. 2-13. Inertias other than that shown in the figure are negligible. The pulley radius r = 0.09 m and the motor inertia JM = 0.01 kg ⋅ m2. Calculate the torque Tem required to accelerate a load of 1.0 kg from rest to a speed of 1 m/s in a time of 4s. Assume the motor torque to be constant during this interval.

2 2‐5 For the belt and pulley system shown in Fig. 2-13, M = 0.02 kg. For a motor with inertia JM = 40 g ⋅ cm2, determine the pulley radius that minimizes the torque required from the motor for a given load‐speed profile. Ignore damping and the load force fL.