Torque Generation Comparison Under Different Excitation Modes for the Classical and Mutually Coupled Winding Configurations of the Axial-Field Switched Reluctance Machine with Segmented Rotor

This paper deals with a 3-phase double stator, 36-slot per stator and 24-pole segmented rotor axial-field switched reluctance machine. The topology of the axial-field double stator switched reluctance machine (AFDSSRM) is made of 2 stators connected in series and a segmented rotor in between. Each stator tooth holds one coil dedicated to one phase. In this paper, two winding configurations are explored for the AFDSSRM, the classical winding for SRMs (+A- -B+ +C- -A+ +B- -C+) and the mutually coupled one (+A- +B- +C- +A- +B- +C-). The AFDSSRM is modeled using 2D finite element model (FEM). The 2D-FEM is established at the mean radius of the machine with the hypothesis of radial invariance of local quantities. It is used to achieve calculations of self and mutual inductances, self and mutual flux-linkage. The 2D-FEM will then be used to assess performances of the classical winding configuration and the mutually coupled winding configuration with regards to output torque for three different current distributions. The motor is first fed with 3-phase step current in unipolar and bipolar mode. Then a 3-phase sinusoidal current is used.