Calculation of Self and Mutual Inductances in Salient-Pole, Three-Phase Synchronous Machines with Open Slots

The knowledge of the self and mutual inductance parameters of the electrical synchronous machines, as a function of the rotor position, leads to analyse their instantaneous operation in a quite easy and quick manner. In a related paper an analytical method has been developed for the calculation of the air-gap flux density distribution, modelling slotting, anisotropy, armature and rotor m.m.f.s. Leaving from this basis, here the windings inductance evaluation is developed, under the hypothesis of unsaturated core: the related procedure takes automatically into account all the armature and inductor constructional and winding data and it can be applied in the general case of a machine with a fractional slot armature winding