METHOD FOR MANUFACTURING STATOR CORE OF ROTARY ELECTRIC MACHINE

摘要

PROBLEM TO BE SOLVED: To manufacture a stator core in which contact area with a frame can be secured as preset and intended heat dissipation performance can be attained. SOLUTION: When the stator core is manufactured by laminating a large number of annular core materials of electromagnetic steel plate and welding them at a plurality of points on the outer circumference thereof along the axial direction, outer circumference of the core material 2a before welding is formed to vary such that the radius Roa at a welding groove portion 9 becomes larger than a target perfect circle radius Ro and the radius Rob at the midpoint between adjacent welding groove portions 9 becomes smaller than the target perfect circle radius Ro. COPYRIGHT: (C)2006,JPO&NCIPI