Patent ID: 8347884

Claim:
A brushless fan motor, comprising: a case having a top, a bottom and a side wall located between the bottom and the top, the top having an inlet disposed thereon, and the side wall having an outlet disposed thereon; a tubular part disposed in the case, and an end of the tubular part is fixed at the bottom; at least a bearing disposed in the tubular part; a toric coil surrounding the tubular part; and a rotating assembly, comprising: a turntable having a top surface facing the top of the case and a plurality of fan blades disposed on the top surface; a rotating shaft disposed through the bearing, and an end of the rotating shaft being connected to the turntable; a loading ring connected to the turntable and surrounding the toric coil; a permeability metal element having an annular part fixed at an inner wall of the loading ring; and a toric radial magnet fixed at an inner wall of the annular part of the permeability metal element.