Multiphysics optimization design flow with improved submodels for salient switched reluctance machines

摘要

Multiphysical optimization design of electrical machines is essential, in which the submodels, including electromagnetic, thermal and noise/vibration (NV) simulation models are required not only to be accurate to facilitate coupling analysis, but also of small computation to guarantee calculation speed. In this paper, a multiphysics design flow for salient electrical machines is proposed. The flow aims to maximize torque with temperature rise and acoustic guaranteed, in which each submodel of fast and accurate calculation is respectively studied. For electromagnetic analysis, an efficient finite element (FE) based program is proposed to model distribution of magnetic saturation on salient poles. For NV analysis, an analytical frequency estimation approach is proposed. For thermal analysis, a lumped parameter network model with compensation elements is studied. An 8/6 salient switched reluctance machine (SRM) of high power density for vehicular traction application is studied.