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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...
This paper aims to compare ring permanent magnet rotor and solid cylinder permanent magnet rotor for high-speed permanent magnet synchronous machine. Due to the difference between structures, sleeves of two kinds of rotors are made of different materials. Thus, assembling methods of sleeves and their thicknesses vary. Moreover, electromagnetic properties are also influenced. Then measures are taken...
Permanent-magnet synchronous machines (PMSMs) are considered a very promising machine type for high-speed applications nowadays. As permanent-magnet (PM) materials are generally fragile, a high strength sleeve is required to protect the PMs from damage due to extreme centrifugal forces. The rotor sleeve occupies space of the effective air gap of the PMSMs, so it is difficult to perform the electromagnetic...
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