| Abstract |
The several new winding configurations, such as fractional slot concentrated winding andconcentrated winding with two slot pitches, have been attracted lots of attentions due to their inherentadvantages such as short ending winding, easy manufacture and so on. However, these windingconfigurations are always suffer from much richer magneto motive force(MMF) harmonic contentsand their MMF waveforms are far from sinusoidal waves compared to regular integer slot winding,and this leads to that the existing the MMF analysis equations built for regular integer and factionalslot distribution windings do not work well for these novel winding configurations, especially forpoly-phase windings, whose phase number is not three. This paper proposes general equations forpredicting the harmonic order for any poly-phase windings. The phase belt, distribution and slot pitchfactors for multiphase winding configuration with highest fundamental are derived. Based on theproposed equations, the key electromagnetic performances of multiphase winding including regularthree phase winding, such as harmonic orders and contents, can be efficiently and effectively predictedand calculated. Finally, Several FEA models are built to verify these equations. |
