Variable Gain PI Controller Design For Speed Control of a Doubly Fed Induction Motor Using State-Space Nonlinear Approach

T. Mohammed Chikouche, A. Mezouar, T. Terras, S. Hadjeri


This paper presents a comparison between a variable gain PI controller and a conventional PI  controller used for speed  control with an indirect field orientation control of a Doubly Fed Induction Motor (DFIM), fed by two PWM inverters with a separate DC bus link. By introducing a new approach for decoupling the motor’s currents in a rotating (d-q) frame, based on the state space input-output decoupling method, we obtain the same transfer function (1/s) for all four decoupled currents. Thereafter, and in order to improve control performance, the VGPI controller was used for speed regulation. The results obtained in Matlab/Simulink environment illustrate the effectiveness of the technique employed for the decoupling and for speed regulation.


doubly fed induction motor (DFIM); input output decoupling; field-oriented control; variable gain PI controller; conventional PI controller

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