Optimal energy saving trajectories of induction motor with suppression of sudden acceleration and deceleration

In order to drive the electric machines using the motors efficiently, the energy loss should be minimized during its operation. The optimal torque and rotating speed trajectories to minimize the energy loss of the induction motor (IM) during its operation has been proposed when the operation time, rotating speed, and rotational angle are given as drive conditions. However, the optimal trajectories may cause sudden acceleration and deceleration. As a result, big jerk appears. This paper proposes a design methodology of the optimal energy saving and jerk suppression trajectories for IM by means of the variational method and the S-curve trajectory.