Subdomain Approach for IPMSM via an Equivalent SPMSM Model

In this paper, sub domain analysis is utilized to find the air gap field for interior permanent magnet synchronous motor (IPMSM). The model is simplified, for analysis, as a surface permanent magnet synchronous motor (SPMSM) with a virtual steel sheet on the PM top. The virtual steel sheet serves a buffer region for the PM flux, and a very close FEM result is obtained from the simplified model. Based on the simplified model, sub domain analysis is validated.