a surface length of each of the stator teeth is greater than {HEAD ~ a sum} of {TAIL ~ a stroke length} of the motor and an axial thickness of one of the magnets in the buried magnet system, and 
of
a surface length of each of the stator teeth is greater than { HEAD ~ a sum } of { TAIL ~ a stroke length } of the motor and an axial thickness of one of the magnets in the buried magnet system , and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH