SWITCHED FLUX PERMANENT MAGNET MACHINE WITH SEGMANTED MAGNETS

摘要

In this paper, a switched flux permanent magnet (SFPM) machine with radially segmented permanent magnets (PMs) is presented. The thickness of each segment is optimized to maximize the torque performance and reduce the total magnet material volume. The influence of the number of segments is studied by testing a different number of segments, i.e. 3, 5 and 7. Furthermore, a comparison between a conventional with non-segmented magnets (CSFPM) machine, an SFPM machine with trapezoidal-shaped magnets (TSFPM) and the proposed machine with segmented magnets (SSFPM) is presented. It is found that, the SSFPM has higher torque and higher torque per magnet volume than that of the CSFPM and TSFPM machines.