Patent ID: 7728481
Filing Date: 2010-06-01
Classification: H02K

Abstract:
1. A laminated body for a motor, comprising: a yoke shaped to allow spiral lamination resulting in multiple turns of lamination layers, the yoke having a first edge and a second edge, with multiple notches respectively formed at certain intervals along the first edge; multiple teeth respectively spaced apart and extending laterally from the second edge of the yoke, each tooth having a pair of notched junctions respectively at a corner portion of the tooth that meets the second edge of the yoke, and each tooth having a stopper with two tapered ends protruding in opposing directions from a distal end of the tooth, wherein a contour of the notched junctions between two adjacent teeth matches a contour of the tapered ends of the stopper; coupling portions formed on each tooth to engage adjacent turns of lamination layers to each other upon spiral lamination; and multiple pin holes formed along the yoke thereof to accommodate a laminating device during spiral lamination, wherein each tapered end of the stopper has an outer edge and an inner edge opposite the outer edge, the outer edge being inclined with respect to the inner edge to reduce cogging torque, and the inner edge having a notch to accommodate coil windings for the motor.