A High-Precision Model for Dual Three-Phase PMSM Considering the Effect of Harmonics, Magnetic Saturation, and Electromagnetic Coupling

Dual three-phase permanent magnet synchronous motor (DTPPMSM) can realize low-voltage high-power drive, fault-tolerant operation, and presents lower torque ripple. To comprehensively describe the electromagnetic characteristics of DTPPMSM, this article proposed a high-precision model of the machine. The proposed model is established based on the flux linkage extracted via finite element analysis (FEA), which can take into account the cross-coupling effect, the electromagnetic coupling between the two sets of three-phase windings, the nonlinearity caused by magnetic saturation, the influence of harmonic magnetic field, and rotor position. The model is established based on the existing FEA results and interpolation, no more calculation is required during the running, so the model has both high-precision and fast calculation speed. The accuracy and feasibility of the proposed model are verified by experimental results.