Motor and cleaner comprising the same

A motor comprising:

• a stator;
• a rotating shaft arrangeable inside the stator, the rotating shaft rotatable about a rotation axis;
• a rotor coupleable to the rotating shaft, the rotor rotatable about the rotation axis of the rotating shaft by electromagnetically interacting with the stator while the rotating shaft is arranged inside the stator;
• and
• an impeller coupleable to the rotating shaft to generate a flow of air,
• wherein a plurality of protrusions or a plurality of grooves are formed on an inner surface of a hub which is opposite to a surface of the hub from which a plurality of blades protrude and facing inward toward the rotating shaft,
• wherein the impeller further comprises a plurality of recesses, distinct from the plurality of protrusions or the plurality of grooves, formed on the impeller to correct for an imbalance of the impeller, wherein the plurality of recesses are spaced apart from each other along an axial direction of the rotating shaft,
• wherein each of the plurality of recesses is formed by cutting at least a portion of the impeller.