Dynamics of Motor-Load Combination

• where is motor and load torque respectively in Nm, J is the moment of inertia and is the angular velocity in rad/sec.
  
  
• Motor torque is the applied torque and load torque is the resisting torque.
  
  
• Different states at which an electric drive causing rotational motion are
  (i) :- The drive will be accelerating, in particular, picking up speed to reach rated speed.
  
  (ii) :- The drive will be decelerating and particularly, coming to rest.
  
  (iii) :- The motor will continue to run at the same speed, if it were running or continue to be at rest, if it were running.