Patent ID: 7327064

Claim:
A brushless motor comprising: a rotor including a permanent magnet magnetized N pole and S pole alternately in a rotary direction; a stator including a core facing the permanent magnet in a radial direction and wound with a coil, and a bearing rotatably supporting the rotor, wherein the permanent magnet has 12 magnetic poles, and the core has 9 salient poles, wherein the core has the salient poles at its ends, and ones of slot inclusive-angles of salient poles adjacent to each other have slot inclusive angle A, slot inclusive angle B, and slot inclusive angle C, and wherein, when a relation of A<B<C is found, the slot inclusive angles in one cycle of the core are arranged in the sequence of A-B-B-C-C-C-B-A-A-for producing a lateral pressure urging the rotor along a radial direction.