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Interior PM (IPM) machines can have severe local magnetic saturation especially in the rotor iron region above the PMs and the stator tooth-tips. In this paper, the influence of local magnetic saturation on the iron losses is comprehensively investigated in IPM machines accounting for the influence of the slot/pole number combinations. Due to local magnetic saturation, the tooth-tips have much higher...
The local magnetic saturation in tooth-tips of surface-mounted permanent magnet (SPM) machines generates on-load terminal voltage distortion, especially when small or closed slot openings are adopted. This paper focuses on investigating the influence of slot and pole number (Ns/2p) combinations on this phenomenon in both fractional slot and integer slot SPM machines. The mechanism of this phenomenon...
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