| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for firmly fixing mutual electromagnetic steel plates, while avoiding or suppressing deterioration in the magnetic characteristics of a yoke for an armature or an increase in iron loss, in the yoke for armatures which has a plurality of stacked electromagnetic steel plates. SOLUTION: In the electromagnetic steel plates 12 which constitute the yoke 10 for armatures, a first electromagnetic steel plate 121 and a second electromagnetic steel plate 122, adjacent in a direction of an axis Q to it are coupled to each other by partial transformation, in the direction of the axis Q outside a brim 14o of a through-hole 14 centering upon the axis Q, in plan view. In planes that the first electromagnetic steel plate 121 shows, the plane facing the second electromagnetic steel plate 122 shows a projection 161, which projects in the direction of the axis Q toward the second electromagnetic steel plate 122, and in the plane the second electromagnetic steel plate 122 shows that the plane facing the first electromagnetic steel plate 121 shows a recess 181, which sinks in the direction of the axis Q, at a position corresponding to a plan view corresponding to the projection 161. The coupling between the first electromagnetic steel plate 121 and the second electromagnetic steel plate 122 is kept by the projection 161 and recess 181 that engage with each other. COPYRIGHT: (C)2011,JPO&INPIT |
