An investigation into the cogging torque in a four-pole interior-magnet brushless machines having either a six-slot stator and a short-pitched nonoverlapping winding or a 12-slot stator and a full-pitched overlapping winding is described. It is shown by finite-element analyses and measurements that, by appropriately defining the pole-arc to pole-pitch ratio, the optimal pole-arc to pole-pitch ratio for minimum cogging torque, which has been derived for surface-mounted magnet machines, is equally applicable to interior-magnet machines.
|Number of pages||3|
|Journal||IEEE Transactions on Magnetics|
|Issue number||5 II|
|Publication status||Published - 23 Sep 2003|
|Event||International Magnetics Conference - Boston Marriott Copley Place, Boston, United States|
Duration: 30 Mar 2003 → 3 Apr 2003