| Summary: | The effect of tooth tips on the performance variations due to using grain-oriented electrical
steel (GOES) stator laminations in permanent magnet fractional-slot modular
machines is studied in this work. It is concluded that the electromagnetic
performance is further improved using GOES in machines with tooth tips compared
to machines without tooth tips. This is due to a higher increment on the flux
density in the airgap. The acoustic behaviour variations due to using GOES are
predicted by analysing several mechanical- and acoustic-related parameters. It
is predicted that implementing GOES improves the acoustic behaviour in machines
without tooth tips. Furthermore, the effects of GOES in machines with tooth tips
are slightly improved compared to machines without tooth tips. However, in order
to determine the real mechanical and acoustic behaviours, further analysis is
needed.
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