Abstract
Aiming at non-linear model of multivariable induction motor, traditional PI method is hard to achieve satisfactory control purpose. Fuzzy control can carry the real-time control on system without the accurate mathematical model of induction motor. This paper elaborates induction motor vector control system and the basic principle of the fuzzy PI, making use of fuzzy reasoning, automatically adjusting the controller’s parameters. Simulation results prove that fuzzy PI controller is superior to traditional PI controller in the aspect of response speed, steady state accuracy and disturbance attenuation.
Highlights
PI control algorithm is simple, realized used in traditional induction motor speed regulating system usually
The fuzzy control can realize the automatic adjustment of the control parameter, with strong adaptability and good speed governing
Fuzzy control is computer intelligent control based on fuzzy set theory, fuzzy language, fuzzy logical-inference, its basic idea is presented by famous professor named L.A.Zadeh in California university in America, who achieved the great success in fuzzy control theory and application study through development of many years
Summary
PI control algorithm is simple, realized used in traditional induction motor speed regulating system usually. For complex model of induction motor, the parameter of the controller is hard auto adjust to adapt outside conditional variety, making the control of motor inaccuracy. Realize the automatic adjustment of the controller parameter, can adopt the method of the fuzzy control theories. The fuzzy control can realize the automatic adjustment of the control parameter, with strong adaptability and good speed governing. This paper apply vector control method on induction motor, use the decoupling of rotor flux linkage and torque, practice a continuous control, comparatively width speed governing scope. Electric current loop use space vector pulse width modulation, and design a kind of controller of self- adaptation fuzzy control, proceed simulation study through Matlab/Simulink, carry on contrast with traditional PI controller
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