Global Loss Minimization Control of PMSM Considering Cross-Coupling and Saturation

A global permanent magnet synchronous machine (PMSM) loss minimization control method is proposed based on nonlinear optimization in this paper. A look-up table based PMSM flux-linkage model is introduced to account for the saturation and cross-coupling effect, and the iron loss model is also numerically developed to account for the harmonic effect. The loss minimization problem can be programmed as a convex nonlinear optimization problem, which can be solved by an optimizer efficiently and effectively. The accuracy of the torque and iron loss is verified by FEA simulations, which confirm the effectiveness of the proposed method.