“…Cross-section of a WFFSM and a PMFSM, where FEC stands for the DC field coil whereas AC stands for the three-phase AC armature coil. [57,62,68,69,71,72,74,76,77,83,90,100,113,117,[120][121][122][123][124][125][126][127][128][129][130]. Parenthesis indicate the mechanical output power and base speed, respectively, in (kW,r/min).…”