Speed and Flux Control of Synchronous Reluctance Motor by Second Order Sliding Mode with Super Twisting and Prescribed Law Variable Methods

Due to nonlinear and variable structure of synchronous reluctance motors (SynRM), variable structure controllers such as sliding mode controllers are effective methods to their control. In this paper, two new methods for speed and stator flux of a SynRM based on second order sliding mode controllers (2-SMC) are proposed. Using Prescribed Law Variable (PLV) controller for speed control and Super Twisting (ST) controller for flux control leads to decrease the chattering phenomenon and improve the dynamic response. In order to show the robustness of the proposed control methods to motor parameters variations, the maximum magnitude of parameters uncertainties are calculated. The effectiveness of the designed control scheme is confirmed via simulation.