Rotor Loss Calculation and Thermal Analysis of a Dual-Stator Axial-Flux Permanent Magnet Machine with Combined Rectangle-Shaped Magnets

摘要

This paper presents thermal analysis of a water-cooled dual-stator axial-flux permanent magnet (AFPM) machine with focus on the sandwiched rotor. The rotor of the machine is featured by combined rectangle-shaped magnets. Firstly, the eddy current losses in the PM are calculated and analyzed. Secondly, lumped-parameter and FE thermal models are established to calculate the temperature distribution of the machine. The results of the two methods show good agreement. Additionally, a detailed thermal analysis of the rotor is carried out. It shows that the segmented PMs can be efficient to reduce the eddy current loss and the non-uniform eddy current loss density of PM has a significant influence on the location of the rotor hot spot.