{HEAD ~ The magnetic properties} of the rotor and cores are selected to insure that the pole strength in the teeth will be retained during {TAIL ~ the changes} in electromagnet current 
{ HEAD ~ The magnetic properties } of the rotor and cores are selected to insure that the pole strength in the teeth will be retained during { TAIL ~ the changes } in electromagnet current
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH