Internal and sliding mode current decoupling control of asynchronous motor

After the vector control of the asynchronous motor goes through the coordinate transformation, the cross coupling still exists between d and q axis in the electric current loop, and the coupling weight increases with the synchronizing frequency. There is coupling and retardation in traditional PI controller. The voltage feedforward decoupling is sensitive to the parameters. Therefore, it is feasible to design a current decoupling control method with the integration of internal and sliding mode. Realize the dynamic decoupling towards the current through the internal mode control; adopt the insensitive characteristics of the sliding mode control towards the parameter change, so as to inhibit the influence of the parameter perturbation and external disturbance, and improve the robustness of the system. The simulation result indicates that this method can effectively realize the dynamic decoupling of the current and improve the dynamic performance of the system. Besides, it has good robustness.