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- W2988070980 abstract "This study investigates the modulation effects in any m-phase permanent magnet machines with fractional-slot concentrated windings and separates the average torque contributed by the winding space harmonics, with particular emphasis on unequal stator teeth. First, winding space harmonics of m-phase machines with double/single layer windings are analysed and modulation effects of equal/unequal teeth are studied. It is found that, apart from the conventional torque contributed by main harmonic (v = p) and modulated torque by v = p ± N s harmonics (N s is slot number and p is pole pair number), additional modulated torque owing to v = p ± N s/2 harmonic appears in the unequal teeth machines. Then, 12-slot/10-pole (12S10P) three-phase and 10S8P five-phase machines are employed to verify the analysis through finite element method. It is demonstrated that, for unequal teeth machine, v = p − N s and v = p − N s/2 harmonics have positive average torque contribution, around 6.5 and 6% to the total torque. The v = p + N s and v = p + N s/2 order harmonics produce negative average torque but with much smaller values. Finally, experiments are carried out on the 10S8P unequal teeth prototype." @default.
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- W2988070980 date "2020-02-20" @default.
- W2988070980 modified "2023-10-18" @default.
- W2988070980 title "Contribution of winding space harmonics to average torque in fractional‐slot concentrated permanent magnet machines with equal/unequal teeth" @default.
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- W2988070980 doi "https://doi.org/10.1049/iet-epa.2019.0606" @default.
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