Linear Induction Motor Vector Control System Based on Fuzzy Logic Controller
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Date
2018-11
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Addis Ababa University
Abstract
Linear induction motors (LIM) are special developments of conventional induction motors.
conceptual construction principle of a motor is, made by cut out and laid flat rotational induction
motors (RIM). The motor is used for a variety of demanding applications, including high speed
ground transportation and specific industrial applications. The aim of this thesis is to present
modeling of LIM including end effect using MATLAB Simulink and applied vector control system
to control the proposed motor, to achieve accurate operation to required applications. In order to
check accuracy of vector controlled system, simulation of the developed system is performed using
MATLAB software with added Fuzzy Logic Controller on proposed control mechanisms. This
controller performance is compared with conventional proportional plus integral(PI) controller.
Their validity, again implemented on MATLAB. Both types of vector controller techniques are
tested at different dynamic conditions, which are no-load and load condition, variation of primary
resistance condition and, sudden command speed change and tracking, are presented. In addition
to mentioned conditions tested, end effect existence factor on vector control systems are performed
using simulation. From overall simulations results, we noticed that, FLC gives good relative
responses over conventional PI controller in all conditions. For instance, change variation error
occurred on PI controller from varies between (0 to 0.047) to zero steady state error and also
minimize maximum peak overshoot exist on PI controller from 0.069 to 0.016. Hence, fuzzy logic
controller is relatively a robust controller.
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Keywords
End effect, Fuzzy logic controller, Linear induction motor(LIM), MATLAB, PI controller, Vector Control