ESO-based Finite Set Model Predictive Current Control PMSM Delay Compensation

MPC generally needs a digital control system to implement in practical. It is a typical digital control method, and digital control systems generally have the problem of one-step delay. In motor control, the existence of a one-step delay in the system lead to undesirable consequences such as current ripple, increased oscillation, and weakened stability. In this paper, aiming at the one-step delay problem of the permanent magnet synchronous motor MPC control system, the extended state observer (ESO) is used for closed-loop delay compensation. This method can improve the anti-interference ability of the system, and has obvious suppression effect on parameter perturbation and unknown disturbance that appear during system operation. Finally, it was verified by Simulink, and compared with non-compensation and commonly used compensation methods based on the actual model of the motor. The results show that the proposed method has good one-step delay compensation characteristics and can effectively improve the control effect of finite set model predictive current control (FCS-MPCC).