A novel modeling approach to a multi-phase, high power synchronous machine

This paper deals with the electrical modeling of synchronous machines equipped with more than one three-phase stator windings. First, the general model structure is derived in a stationary reference frame and transformed into the d-q coordinates. For both forms, a minimal common set of parameters is defined to fully characterize the stator portion of the model, which is the only one differing form usual single three-phase winding machines. Then a method is proposed to compute each of the characteristic parameter. Finally, the previous theory is applied to the study of a special four-winding machine, whose model is numerically computed and discussed through FEM analysis, for different possible stator winding design arrangements