A brushless fan motor includes a case, a tubular part disposed in the case and fixed at a bottom of the case, at least a bearing disposed in the tubular part, a toric coil surrounding the tubular part, and a rotating assembly. The rotating assembly includes a turntable, a rotating shaft, a loading ring, a permeability metal element and a toric radial magnet. The turntable has a top surface and fan blades disposed on the top surface. The rotating shaft is disposed through the bearing and connected to the turntable. The loading ring connected to the turntable surrounds the toric coil. The permeability metal element includes an annular part fixed at an inner wall of the loading ring. The toric radial magnet is fixed at an inner wall of the annular part. A positive airway pressure breathing apparatus using the brushless fan motor is also provided.
