Motor having stator with L-shaped salient poles

摘要

A motor comprises a base to rotatably support a rotor and a ring-shaped magnet having a magnetic pole segment which is S-pole shaped and a magnetic pole segment which is N-pole and which are magnetized alternately in the circumferential direction. The ring-shaped magnet is fixed on the rotor. An armature core with a plurality of pole teeth is radially formed and a coil is wound up in each of the pole teeth. The armature core is mounted on the base so as to face an internal circumference of the ring-shaped magnet. First salient poles of the armature are included, the tip of the first salient pole faces the ring-shaped magnet through an opening in the circumferential direction. Second salient poles of the armature core extend in the circumferential direction from the tip of the second salient poles which face the ring-shaped magnet through an opening in the axial direction.