Patent ID: 7868493

Claim:
A motor comprising: a base including an axle tube extending along an axis; a stator mounted around the axle tube; a rotor including a hub, a shaft coupled to the hub, and a permanent magnet coupled to the hub, with the shaft rotatably extending through the axle tube, with an air gap formed between the permanent magnet and the stator, with the permanent magnet including a first magnetically conductive face having a first width in a radial direction perpendicular to the axis; and a balancing member mounted below the rotor, with the balancing member including an upper surface facing the permanent magnet, with a magnetically conductive section formed between the upper surface and the first magnetically conductive face, with the balancing member further including a magnetically attracting portion in the magnetically conductive section, with the magnetically attracting portion including a second magnetically conductive face having a second width in the radial direction, with the second width not greater than the first width, and with a magnetically attracting spacing being formed between the first and second magnetically conductive faces and in a range of 0.2-1.5 mm.