Patent ID: 6477761
Filing Date: 2002-11-12
Classification: H02K,Y10T

Abstract:
A method for producing a stator core of an AC generator comprising the steps of:(a) forming a plurality of first cylinder bodies, each of said plurality of first cylinder bodies having a predetermined thickness of 1/N (N is a natural number greater than 2), of a predetermined axial thickness of the stator core, wherein each first cylinder body is formed by laminating a plurality of thin metal sheets; (b) forming a second circular cylinder body by laminating said plurality of first cylinder bodies to have said axial predetermined thickness, wherein said plurality of first cylinder bodies contribute as a plurality of core units in the second cylinder body, and wherein each of said plurality of thin metal sheets of each of said plurality of first cylinder bodies is fixedly secured by welding on the outer or inner periphery of the first cylinder body; and (c) fixedly securing each core unit by welding on the outer or inner periphery of the second cylinder body, wherein a peripheral welding location between two adjacent first cylinder bodies is selected to be different from a welding location of the plurality of thin metal sheets of each of said first cylinder bodies.