Question

Calculate the value of the angular acceleration of the motor using the given data: J = .1 kg-m^2, load torque = 45 N-m, motor torque = 55 N-m.

(a) 100 rad/s^2

(b) 222 rad/s^2

(c) 300 rad/s^2

(d) 400 rad/s^2

The question was asked in quiz.

This key question is from Induction Motors in chapter Speed Control of Direct Current Motors & Induction Motors of Electric Drives

Answer 1

Correct answer is (a) 100 rad/s^2

Easiest explanation: Using the dynamic equation of motor J×(angular acceleration) = Motor torque – Load torque: .1×(angular acceleration) = 55-45=10, angular acceleration = 100 rad/s^2.