Simulation of a toroidal wound flux-switching permanent magnet machine

Abstract

A small size flux-switching permanent magnet machine is designed by means of finite element analysis having a concentrated toroidal winding in the stator and a large air-gap. The design concept is compared to a C-core flux-switching machine having the same magnet volume. Simulation shows that the electromagnetic performance of the toroidal wound FSPM is lower in the first place because of the different winding configuration. However a better cooling of the stator winding is possible so that at full load operation the temperature rise of the winding can be better limited.

Design of a lightweight toroidal flux-switching permanent magnet machine with large air-gap

“…In order to investigate the heating of the machine similar investigations already presented in [12] are carried out with special focus on the improvement of the thermal model. The Steinmetz coefficients as well as the material data at 1 kHz are used and PMs are axially segmented into four segments to limit the losses in the PMs [12] .…”

“…The Steinmetz coefficients as well as the material data at 1 kHz are used and PMs are axially segmented into four segments to limit the losses in the PMs [12] .…”

“…1 shows the cross section of two different FSPM machines. Both machines have in common that they use only half of the magnet volume of a conventional FSPM machine [11], [12]. They have an equal combination of stator poles to rotor poles (6/8-FSPM machine design) which is beneficial for application where a large air-gap and high frequency operation are requirements [13].…”