An Enhanced Hybrid Subdomain Method Toward Electromagnetic-Thermal Performance Analysis of Synchronous Reluctance Motor

This work proposes an enhanced hybrid subdomain method (EHSDM) for concurrent prediction of magnetic and thermal fields in synchronous reluctance motors (SynRMs). The EHSDM synergistically integrates the improved finite difference method (IFDM) and the improved subdomain method (ISDM). Moreover, it introduces three key enhancements. First, the IFDM simplifies the inner interface condition, streamlining the programming process. Second, both the IFDM and ISDM handle material nonlinear effects across all analysis regions through an iterative process. Lastly, the EHSDM introduces a unique capability for bidirectional coupling calculation of both magnetic and thermal fields with the same model, simplifying the intricate computing procedures. Feasibility and reliability of the proposed EHSDM are validated through finite element analysis (FEA) and experimental testing.