Patent ID: 7923878
Filing Date: 2011-04-12
Classification: H02K

Abstract:
1. An axial gap coreless motor, comprising: a stator including a stator yoke having a surface and being composed of a plurality of laminated layers of silicon steel sheets secured together, a wiring substrate having a surface and being disposed on the stator yoke surface, and a plurality of coreless coils annularly disposed on the wiring substrate surface; and a rotor including a rotor magnet having a plurality of circumferentially arranged magnetic poles, wherein the rotor is rotated relative to the stator such that the rotor magnet axially confronts the coreless coil over an air gap, wherein the plurality of laminated silicon sheets are secured by together by a caulking disposed in an equal circumferential distribution, and wherein a number of the circumferentially disposed caulking and a number of the magnetic poles of the rotor magnet do not have a common denominator other than 1.