Open AccessComparison of optimal slot/pole number combinations in fractional slot permanent magnet synchronous machines having similar slot and pole numbers
Author(s) -
Liu Yue,
Zhu ZiQiang,
Gan Chengwei,
Brockway Simon,
Hilton Chris
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8202
Subject(s) - magnet , rotor (electric) , torque , control theory (sociology) , topology (electrical circuits) , torque density , electromagnetic coil , function (biology) , mathematics , physics , computer science , engineering , mechanical engineering , electrical engineering , artificial intelligence , control (management) , evolutionary biology , biology , thermodynamics
Here, the selection of optimal slot/pole (Ns‐slot/pr‐pole) number combination between the pairs of fractional slot concentrated winding (FSCW) permanent magnet synchronous machines (PMSMs) with Ns = 2pr ± 1 or Ns = 2pr ± 2 will be analysed by a modified winding function accounting for slot opening and validated by finite element method. The results show that for FSCW PMSMs with Ns = 2pr ± 1 or Ns = 2pr ± 2, the higher pole machine will have larger winding factor and hence better torque performance than the lower pole one. Moreover, it also reveals that this torque advantage is more evident in the external rotor machine than that in internal rotor machine.