PMSM Speed Control Based on Improved Super-Twisting Algorithm and Cur-rent Prediction
In response to issues such as slow response speed,low control accuracy,and poor robustness in the tradi-tional PI controller for permanent magnet synchronous motors,this paper proposes an improved speed control scheme.Firstly,the global fast integral sliding mode theory is integrated with the generalized Super-Twisting algorithm.Based on the Anti-Windup principle,an improved generalized Super-Twisting integral sliding mode velocity controller is de-signed,incorporating a novel segmented exponential function to optimize the control law.Secondly,an improved ex-tended disturbance observer is designed to provide feedforward compensation for unknown disturbances in the system.Finally,a no-derivative current prediction controller is introduced into the current loop to further enhance the system's dynamic response.Simulation results demonstrate that the proposed improved control scheme effectively enhances the dynamic control performance,control accuracy,and robustness of the speed control system.
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