Patent ID: 6661150
Filing Date: 2003-12-09
Classification: H02K

Abstract:
A motor comprising:a base to rotatably support a rotor; a ring-shaped magnet having a plurality of magnetic pole segments, wherein said pole segments including a number of south (S) magnetic pole segments and a number of north (N) magnetic pole segments, said S and N magnetic pole segments are magnetized alternately in the circumferential direction, said ring-shaped magnet being fixed on said rotor; an armature core with a plurality of pole teeth being radially extended outward and a coil being wound up in each of said pole teeth, said armature core being mounted on said base so as to face an internal circumference of said ring-shaped magnet; said armature each of said pole teeth of core having first salient poles, a tip of said first salient pole vertically facing said ring-shaped magnet through an opening in the circumferential direction; and said armature core having second salient poles, said second salient poles extending in the circumferential direction from the tip of said first salient poles, and horizontally facing said ring-shaped magnet through an opening in the axial direction.