Patent ID: 7105974

Claim:
A synchronous AC motor comprising: a rotor having a plurality of magnetic poles, with alternating N (north) poles and S (south) poles circumferentially disposed at equal intervals; a stator having K stator pole groups, where K is a plural integer, each said stator pole group formed circumferentially on said stator pole group formed circumferentially on said stator and each comprising a plurality of stator poles, with each of the adjacent pairs of said K stator pole groups mutually differing in circumferential position by an identical amount; and a plurality of loop-configuration stator windings formed circumferentially on said stator, with each said loop-configuration stator winding disposed immediately adjacent to a corresponding one of said K stator pole groups, with respect to an axial direction of said rotor; wherein each of said stator pole groups has a corresponding pair of said loop-configuration stator windings disposed immediately adjacent thereto and on respectively opposing sides thereof, with respect to said rotor axis direction.