Aiming at problem of torque ripple and bad anti-interference capability of induction motor（ IM）

a novel direct torque control（ DTC） based on fuzzy sliding mode control（ FSMC） with load torque compensation is designed. The conventional PID speed regulator is replaced by a sliding mode controller. To solve the problem of torque ripple of load in sliding mode controller

a fuzzy logic controller replaces the discontinuous part of the conventional sliding mode control law. It can obviously reduce the torque ripple of IM at low speed. In addition

a load torque observer is proposed to estimate the unknown load torque. The load torque observer is used to estimate load torque disturbances and the estimation is used as the feed-forward compensation in the speed loop. The simulation results show that the design has better dynamic response and speed performance

high robustness and strong anti-interference to load torque disturbance at low speed.