Research on FOC and DTC switching control of asynchronous motor based on parameter estimation

Vector control based on rotor field orientation control (FOC) and direct torque control based on stator field observation (DTC) are nowadays two mainstream control strategies in modern asynchronous motor speed regulating system. Based on the smooth switching control that is combined with the two control methods in the light of the complementarity each other, the online adaptive parameters estimation algorithm is proposed for the parameters of the motor to enhance the robustness of the smooth switching control system. Simulation results show that the method ensures the smooth switch, robustness and effectiveness, with some practical value.