Flux and torque control of synchronous reluctance motor based on second order sliding mode method

In this paper the electromagnetic torque and the square of the stator flux magnitude control using second order sliding mode controller (2-SMC) of a synchronous reluctance motor (SynRM), is proposed. With the purpose of guarantee the electromagnetic torque and stator flux to track its reference signal strictly, the electromagnetic torque sliding mode variable and stator flux sliding mode variable were selected separately. Designed super twisting controller permits to decrease chattering that is inherent in first order sliding mode control and to improve accuracy. Also the upper band of parameters uncertainties, are calculated to serve the stability of the total system. The effectiveness of the designed control scheme is confirmed via simulation.