Patent ID: 8022589
Filing Date: 2011-09-20
Classification: H02K

Abstract:
1. A brushless motor comprising: at least one rotor magnet that forms a plurality of alternating N and S magnetic poles, which are alternately arranged one after another in a circumferential direction at generally equal pitches; a stator core that includes a plurality of teeth, which are opposed to the at least one rotor magnet in a radial direction of the stator core and are arranged one after another in the circumferential direction at alternating first and second pitches that are alternately provided in the circumferential direction, wherein the second pitch is smaller than the first pitch, and a slot is defined between each adjacent two of the plurality of teeth; and a plurality of stator coils that are wound around the plurality of teeth and form a plurality of phases, wherein: each corresponding adjacent two of the plurality of teeth, which are spaced from each other by the first pitch, are wound with corresponding two, respectively, of the plurality of stator coils, which form a corresponding common phase among the plurality of phases; and each corresponding adjacent two of the plurality of teeth, which are spaced from each other by the second pitch, are wound with corresponding two, respectively, of the plurality of stator coils, which form corresponding different phases, respectively, among the plurality of phases.