Research on Speed Control System of PMSM Based on Improved Double Power Reaching Law

To enhance the transient and steady-state tracking performance of a permanent magnet synchronous motor (PMSM) servo system under disturbances, a novel control strategy is proposed. This strategy incorporates an integral sliding mode speed tracking controller based on an improved double power reaching law, ennsure that the system state converges for finite time and effectively reduce the vibration. Simultaneously, a load torque observer is developed, and its output is integrated into the sliding mode control law, further improve the anti-disturbance ability and tracking performance of the system, resulting in enhanced system control performance. Simulation results demonstrate that this new control method exhibits superior robustness and disturbance rejection capabilities compared to traditional reachinges.