3. Conclusion

This article introduced the terminology and definitions specific to rotating machines with more than two independent currents, explaining three approaches for defining the number of phases. Mathematical analysis of the stator inductance matrix allows us to generalize the well-known concept, in the three-phase case, of an "equivalent" two-phase machine.

In the initially simple case of a constant matrix, multi-machine equivalence is introduced and, in the case of regular construction, a distribution of harmonics between fictitious machines is highlighted. This distribution justifies the fact that construction constraints (three-phase "sinusoidal" machine) for control purposes are less stringent for polyphase (non-sinusoidal) machines, allowing for an increase in torque based on the use of harmonics, without any loss of torque quality.

The...