Skew and linear rise of MMF across slot modeling - Winding function approach

A method of calculation of the inductances of an induction machine is proposed. The skewing of the rotor bars of the machine and the resultant linear rise of MMF across the slot, together with the non-sinusoidal distribution of the stator winding are taken into account. The method is based on winding function approach, which allows for all harmonics of MMF to be taken into account. The results obtained by proposed method have been compared with those obtained by conventional manner, which take into account above pnenomena Dy means of scale factors applied to the harmonics. A very good agreement between them is demonstrated.