An Extended State Observer-Based Model Predictive Current Control Strategy for IPMSM Drive System

The current loop is significant for disturbance rejection performance in interior permanent magnet synchronous motor (IPMSM) drive system. This article presents a robust current model predictive control method which significantly expands the bandwidth of the current loop. The proposed method is based on an incremental model which can avoid the disturbance of inaccurate flux linkage. However, disturbance from inaccurate inductors and resistors in the motor model can also affect predictive control. To cope with this problem, the proposed method combines with an extended state observer (ESO) which is used to estimate disturbance and compensate for it. Finally, the effectiveness of the proposed method is verified in Simulink.