Bldc motor and cleaner having the same

A cleaner comprising:

• a brushless direct current (BLDC) motor having a shaft;
• an impeller mounted at the shaft;
• and
• an impeller cover surrounding the impeller, the impeller cover being configured to guide air driven by the impeller into the BLDC motor,
• wherein:
• the BLDC motor includes:
• a plurality of magnets surrounding an outer circumference of the shaft;
• and
• a stator surrounding outer circumferences of the magnets,
• each of the magnets has:
• an outer circumferential surface;
• an inner circumferential surface facing the shaft;
• and
• opposite side surfaces extending between the inner circumferential surface and the outer circumferential surface, each of the side surfaces facing an adjacent other one of the magnets, and
• the magnets include:
• a first magnet magnetized in a direction from the outer circumferential surface of the first magnet to the inner circumferential surface of the first magnet;
• a second magnet magnetized in a direction from the inner circumferential surface of the second magnet to the outer circumferential surface of the second magnet;
• and
• a third magnet magnetized in a direction from one of the side surfaces of the third magnet to another of the side surfaces of the third magnet.

A brushless direct current (BLDC) motor comprising:

• a shaft made of a nonmagnetic material;
• a plurality of magnets extending around an outer circumference of the shaft;
• and
• a stator positioned around outer circumferences of the magnets,
• wherein the magnets include a first magnet and a second magnet that are positioned on opposite radial directions of the shaft, the first magnet is magnetized in a first direction that extends radially inward toward the shaft, and the a second magnet magnetized in a second direction the extends radially outward from the shaft.