A pair of electromagnets having {HEAD ~ ferromagnetic cores} with {TAIL ~ end} adjacent a toothed ferromagnetic rotor are energized to induce temporary magnetic poles in the respective rotor teeth 
with
A pair of electromagnets having { HEAD ~ ferromagnetic cores } with { TAIL ~ end } adjacent a toothed ferromagnetic rotor are energized to induce temporary magnetic poles in the respective rotor teeth
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH