Investigation of Harmonic Losses in a Two-Pole Slotless Permanent-Magnet Motor Due to Wide Bandgap Inverter Supply.

The recent emergence of wide bandgap power devices enables higher switching frequencies in electric motor drives. The subsequent possibility for higher efficiency and smaller size requires accurate prediction of harmonic losses in motors. Therefore, in this article, an original analysis of harmonic losses arising in inverter-fed two-pole slotless permanent-magnet machines with axially segmented ri...