Equivalent two-phase representation of an n-m phase salient-pole machine

This paper presents a generalized analysis for an n-m phase salient-pole electrical machine. The mathematical models of this machine are formulated in the symmetrical components, the two-phase, and the d-q reference frame. Regardless of the number of phases, it is found that the analysis of such a machine is remarkably simplified through its replacement by an equivalent two-phase commutator machine. The paper also presents a sound per-unit system suitable for the transformations used. In addition, the case of a 6- phase salient-pole synchronous generator is considered as a specific practical application of this generalized analysis.