Thermal Network Modeling of a Novel Hybrid Axial Field Flux-Switching Permanent Magnet Machine

Abstract

The hybrid axial field flux-switching permanent magnet machine (HAFFSPMM) is a novel hybrid excited machine with the merits of wide speed range and high torque density. The thermal management of the HAFFSPMM is vital for keeping the performance. In this paper, thermal analysis of HAFFSPMM is carried out so as to keep temperature of machine within the safe range and enhance the reliability. Due to the deficiencies of the common method, a novel 3-D lumped-parameter thermal network (LPTN) model of HAFFSPMM is proposed and some critical issues such as anisotropic thermal conductivity, contact thermal resistance are discussed. And the practicability of the thermal model is validated by the finite element analysis (FEA), which ensures that the machine maintains a safe thermal range under the rated condition. The thermal network model established in this paper is applicable to other axial field machines which have similar structure.