Research on DPCC Control Strategy of PMSM Based on LESO

Abstract

In permanent magnet synchronous motor control system, the excellent current control effect is very important to the control performance of the system. In order to eliminate the sampling delay in digital control, the deadbeat predictive current control strategy considering sampling delay is proposed. In order to solve the problem that the predictive current control has low robustness to model parameters, especially motor inductance parameters, combined with ctive disturbance rejection control technology, the linear extended state observer is introduced into deadbeat predictive current control to observe and compensate the internal and external disturbances of the system. The introduction of linear extended state observer improves the robustness of system parameters and the ability of anti load disturbance. The final designed system has the advantages of good speed tracking performance, strong anti-interference ability and greatly improved parameter robustness. Finally, the feasibility and correctness of the proposed control strategy are verified by simulation.