Patent ID: 8159106
Filing Date: 2012-04-17
Classification: H02K

Abstract:
1. A motor, comprising: a stator that is mounted on a substrate and on whose outer circumference a plurality of magnetic poles are arranged at a first predetermined interval; and a rotor that is rotatably disposed around the stator; wherein an inner circumferential face of the rotor is provided with a magnet magnetized to have opposite polarities at a second predetermined interval in a direction opposing the stator, and magnetized to have opposite polarities at a third predetermined interval in a direction opposing the substrate, each of outer circumferential ends of the plurality of magnetic poles of the stator is provided with a first extended portion that extends from a magnetic pole base to the substrate side, and a second extended portion that extends from the magnetic pole base to a side opposite the substrate side, and a face of the substrate opposing the rotor is provided with a FG pattern including a main pattern and a cancellation pattern outside an outer circumferential face of the stator such that the FG pattern opposes the magnet.