Electromagnetic Analysis of Saliency and Can Effect by Network Models

Determination of flux linkage characteristics is a central step in electromagnetic modeling. The flux linkage, a group of curves varying with phase current levels and rotor positions, is required very accurate, on which main outputs such as torque, radial force and iron loss highly depend [1, 2]. However, modeling of flux linkage, a seemingly simple question, is still under study, especially for electrical machines with salient poles. This is because of the saliency that leads to rotor position dependent airgap paths together with magnetic saturation. Further in this study, flux linkage curves are complicated by adding can-shields in airgap. Due to electrical resistance of cans, the alternating airgap flux will induce eddy current circulation, which will in turn affect that airgap flux, making a coupled relation.