A New Approach to Vector Control using Fuzzy Logic Controller for a Linear Induction Motor Considering End Effects

An equivalent circuit model in the rotor flux oriented frame is developed for the vector control of a linear induction motor (LIM) by adding the so called „end effect‟ to the rotary induction motor (RIM) model. Described the end effect affects by introducing speed dependent scale factors to the magnetizing inductance and series resistance in the d-axis equivalent circuit. Torque and flux equations are correspondingly modified. With the vector control scheme based on the proposed equivalent circuit, one can resolve the thrust attenuation problem in a high speed. We have demonstrated through experiments the improvements achieved by the proposed scheme, is based on the use of the vector control technique associated to fuzzy logic controllers. This technique is adopted to decouple the thrust force and the flux. The implantation of this command is leaded by a numeric simulation. The results are furthermore presented and discussed.