The control of linear induction motor with the fuzzy logic method

The aim of this thesis, to carry out a fuzzy logic control for three phase linear induction motor (LIM).In the first section, the linear motion of the machine's history, structure, general information about the types of applications are given. Linear induction motor winding types, mathematical performance calculations, construction criteria, such as goodness factor, electromagnetic reasons which affect LIMs efficiency are presented.Information about fuzzy sets and membership functions are given and the general structure of a membership function is illustrated. A block diagram of a fuzzy control system is drawn and identified its elements such as rule base, fuzzification etc.In the second chapter, variable frequency drive (VFD) and benefits are explained. As with asynchronous motor, also linear induction motor, changing the frequency of the voltage is changed at the same rate does not change momentum. Very useful in applications with constant torque which is these principles form the basis of this thesis. The parts a motor control block diagram and control flow chart diagrams are illustrated. Parameters and functions for motor control board are defined. Also motor control circuits and printed circuit boards are demonstrated. Engine speed measurement methods are emphasized.Finally, the fuzzy logic control method by applying hardware pwm, by measuring speed microcontroller (16F877), to frequency input pin, which ensure speed control, on microcontroller (16F777) is implemented.