Analysis of Frequency Domain Response Characteristic of FCS-MPC under Different Vector Sets in PMSM Drives

As a control method of permanent magnet synchronous motor, finite control set model prediction can improve the frequency response and reduce the output harmonic content. In order to improve the performance of the PI controller, it is hoped to obtain better steady-state performance in both the linear modulation area and the over-modulation area, as well as a faster response. It is necessary to increase the number of vector sets. However, the number of vector sets is too large, which leads to high computational cost. At present, there is no specific theory to prove the quantitative analysis of the number of vectors and system performance. Therefore, by analyzing the harmonic content and frequency response characteristics of the system output, the quantitative relationship between the number of vector sets and the system performance is obtained, and the optimal vector set control is obtained. The proposed vector set analysis method is verified by simulation to prove its correctness and feasibility.