Author : Fatimah F.Jaber, Diyah K. Shary and Haider Alrudainy

Owing to its merits like lower costs, high starting thrust force, easy maintenance, less mechanical losses, silence, high precision, and so on Linear Induction Motor (LIM) is being increasingly utilized in industries. In this paper, a comparison between two different mathematical models of a LIM based upon the d-q axes equivalent electrical circuit has been investigated. This has been accomplished to define the dynamic performance of LIM when considering the end effects, which can be directly applicable for vector control and drive implementations. The first model separates the primary and secondary(linor) d-q axis currents into two components, one part is free from end effects while the other is based on end effects. The second model, however, takes currents without separating them. In the present study, the linear induction motor responses such as velocity developed thrust, and currents have been simulated and outputted using the MATLAB/SIMULINK toolbox. The simulation results showed that the approach with separating currents is superior than the second model in terms of velocity and thrust force by approximately of an 8.5% and 2.6% respectively.

Keywords: Linear Induction Motor (LIM), end effects, Conventional induction motor (IM), modeling, and simulation.

Article published in International Journal of Current Engineering and Technology, Vol.11, No.1 (Jan/Feb 2021)