Reciprocal Magnetic Model of Synchronous Reluctance Motor and Its Robust Parameter Identification

The most distinctive feature of synchronous reluctance motor (SynRM) is self-saturation and cross-saturation, which results in a lack of physically consistent guidelines for an accurate analytical model with current as an independent variable. In this article, an analytical reciprocity magnetic model (RMM) is proposed to describe the nonlinear magnetic behaviors of SynRM. In the proposed model, the physical constraints are obtained by the analysis of the excitation level in the self-axis and the energy conservation relationship between the orthogonal windings. Then, based on the irrotationality of flux linkage in the coupling field, a modified Gaussian function is constructed to describe the saturation and magnetic coenergy. Furthermore, the advantages of the proposed model are verified through the proposed dual-axis hybrid excited self-commissioning method and the two-stage collaborative coupling (TC) algorithm. In comparison with other modeling techniques, the proposed RMM shows superior comprehensive performance. The experimental results demonstrate that the proposed model has high accuracy and availability.