CPC Subgroup
H02K 21/30 having annular armature cores with salient poles (with homopolar co-operation H02K21/36)
Full Title
Synchronous motors having permanent magnets; Synchronous generators having permanent magnets > with rotating armatures and stationary magnets > with armatures rotating within the magnets > having annular armature cores with salient poles (with homopolar co-operation H02K21/36)