Question

Calculate the value of the angular acceleration of the motor using the given data: J = 36 kg-m^2, load torque = 66 N-m, motor torque = 26 N-m.

(a) 1.11 rad/s^2

(b) 2.22 rad/s^2

(c) 3.33 rad/s^2

(d) 4.44 rad/s^2

This question was posed to me in an online interview.

The query is from Energy Relations During Starting topic in portion Starting of Electric Drives

Answer 1

Correct choice is (a) 1.11 rad/s^2

The best I can explain: Using the dynamic equation of motor J×(angular acceleration) = Motor torque – Load torque: 36×(angular acceleration) = 66-26 = 40, angular acceleration = 1.11 rad/s^2.