I. Introduction
The electromagnetic design of Permanent Magnet (PM) machines is often based on pre-existing projects and historical database collections. In these cases, the electrical engineers tend to get the new machine design using analytical or finite element commercial software that are mainly devoted to the machine performance analysis. Moreover, in the last decades PM machines have been widely adopted in applications having specific constraints in terms of dimensions and that require high power density and high torque density. This often leads to the necessity of investigating new design solutions with technical features and geometries that are usually far away from standard PM machines. In these cases, the utilization of commercial software dedicated to machine analysis or Finite Element Methods (FEMs) for the new project's outcome becomes a difficult task for the designer because these tools already require an initial geometry of the electromagnetic structure as well as the winding features.