Enhanced Current and MTPA Control Performance Utilizing FEM-Based Flux linkage 3D-LUT for Vector-Controlled IPMSM

The Interior PMSM drive systems pose several challenges, including managing magnetic saturation, cross-coupling between the d and q axes current controllers, and other nonlinearities, which can lead to poor control responsiveness. To overcome these challenges, this study proposes a finite element-based flux linkage 3D lookup table (3D-LUT) for both d-q axis flux linkages through an iterative co-simulation process between the circuit solver and the FEM solver integrated with a maximum-torque-per-ampere (MTPA) control technique to enhance the overall dynamic performance. The 3D-LUTs are also utilized to establish an offline circuit-field coupled simulation model with high accuracy to validate the effectiveness of the proposed approach compared to the classical MTPA. The results show that the proposed method managed to refine the MTPA trajectory and the current control accuracy by considering the effect of magnetic saturation and minimizing the parameter mismatch.