| 摘要 |
PROBLEM TO BE SOLVED: To make a stator compact and high in performance by preventing abnormal deformation, elongation, etc., at a cut groove by devising a shape of the cut groove formed on an outer peripheral side of a wound core type laminate core, and securing circularity of the laminate core, proper arrangement of a slot part, etc.SOLUTION: A cut groove 14 provided on an outer peripheral side of a yoke part 13 comprises an arcuate bottom surface 14A which is rectangular on the whole and swells in an outer radial direction along a circumferential direction, a pair of bevels 14B which are formed at both end parts of the bottom surface 14A, and a pair of side faces 14D which extend from the pair of bevels 14B in outward radial directions to form an opening part 14C, and the side faces 14D have reversely tapered surfaces 14E formed from the side of the bottom surface 14A toward the side of the opening part 14C to narrow down the width of the cut groove 14 in the circumferential direction. Consequently, the region of the cut groove 14 has its rolling amount reduced to be as close to 0 as possible and thereby becomes a substantially unrolled region so as to eliminate straining resulting from rolling. |
