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