Induction motor DTC based on adaptive SMC and fuzzy control

This paper presents a novel direct torque control (DTC) based on adaptive sliding mode control (SMC) and fuzzy logic control (FLC) for speed control of induction motor. According to this method, an adaptive sliding mode controller is designed to replace the PID speed controller in order to increase system rapidity and anti-interference ability. In addition, a fuzzy logic controller is used to adjust the bandwidth of torque hysteresis controller. It can obviously reduce the torque ripple of induction motor at low speed. The stability analysis of the closed-loop control system is also analyzed by using Lyapunov theory. The simulation results show that the DTC based on adaptive SMC and FLC has better dynamic response and speed performance, high robustness and strong anti-interference to load torque disturbance at low speed.