On Analytical Modeling of the Air Gap Field Modulation in the Brushless Doubly Fed Reluctance Machine

The brushless doubly fed reluctance machine (BDFRM) is receiving an increased amount of attention from the research community thanks to its potential as alternative drive for variable speed applications, both motor and generator. Currently, sizing BDFRM in literature based on model ideal axially laminated rotor (ALR) discrepancies are hidden compensation factors which turn tuned with a finite element analysis (FEA). This paper proposes analytical framework accurately air gap field modulation, by extension torque density, ducted segmental (DSR) salient pole (SPR). results verified FEA validated prototype.