Patent ID: 6534894
Filing Date: 2003-03-18
Classification: H02K

Abstract:
An axial pole motor, comprising:a stator having a circumferential extent disposed about a stator axis and comprising a base, a predetermined number of stator poles which project axially from said base, and a plurality of coil windings which are respectively wound around said predetermined number of stator poles, said predetermined number of stator poles and said plurality of stator coil windings being substantially uniformly circumferentially spaced throughout said circumferential extent of said stator; a rotor having a circumferential extent disposed about a rotor axis and being disposed opposite said stator such that said stator and said rotor face each other across a plane which is disposed perpendicular to said stator and rotor axes, said rotor comprising a base and a predetermined number of rotor poles, comprising permanent magnets, which project axially from said base and which are substantially uniformly circumferentially spaced throughout said circumferential extent of said rotor; wherein said stator poles and said rotor poles are of substantially the same size and shape; and wherein said predetermined number of stator poles is different from said predetermined number of rotor poles but are arranged in a pole overlap pattern with respect to each other such that when a first one of said rotor poles completely covers a first facing stator pole, the difference between the number of rotor poles and the number of stator poles, which are interposed between said first one of said rotor poles, covering said first facing stator pole, and a second one of said rotor poles, which is different from said first one of said rotor poles, which completely covers a second facing stator pole, which is different from said first facing stator pole, is one.