Speed control of PMSM system using improved reaching law based sliding mode control and disturbance observer technique

In this paper, improvement of transient response of the permanent-magnet synchronous motor (PMSM) subjected to different level of load disturbances and parametric uncertainties and unmodeled dynamics are studied using improved reaching law sliding mode control (IRLSMC) and disturbance observer techniques. Proposed scheme is tested under different load conditions and parametric uncertainties. The results of proposed reaching law are compared with other techniques to prove the effectiveness of proposed scheme. Simulation results show the efficacy of proposed control approach.