The motor includes a buried magnet system and {HEAD ~ a stator operable} to produce {TAIL ~ an alternating magnetic field} exerting alternating axial forces on the buried magnet system that has a self centering force and a required stiffness to reciprocate at a frequency near an alternating current supply frequency 
to produce
The motor includes a buried magnet system and { HEAD ~ a stator operable } to produce { TAIL ~ an alternating magnetic field } exerting alternating axial forces on the buried magnet system that has a self centering force and a required stiffness to reciprocate at a frequency near an alternating current supply frequency
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH