Advanced calculation of eddy current losses in PMSM with tooth windings

The paper deals with a new analytical approach for calculating eddy current losses in permanent magnet synchronous machines with tooth windings. The analytical method presented here differs from known approaches in two points: The field is calculated using an all-in-one method, so the simultaneous calculation of stator and no-load field is possible. To take finite magnet dimensions into account, the calculation of an easy-to-use correction factor for endless dimensions is introduced. Losses caused by stator slotting as well as losses caused by stator harmonics are included. To allow for several load cases the stator current phase angle and the eddy current reaction field is considered.