Patent ID: 7705509
Filing Date: 2010-04-27
Classification: H02K,Y10T

Abstract:
1. A dynamoelectric stator core that is prepared by bending into a cylindrical shape a rectangular parallelepiped core assembly that is formed by laminating rectangular core segments that have been punched from a rolled steel plate, abutting two end surfaces of said core assembly that has been bent, and joining said abutted portion together, said dynamoelectric stator core comprising: said stator core is configured by integrating (m×n) core sections that have shapes that divide a circumferential length of said stator core into m sections (where m is an integer that is greater than or equal to 2) and divide an axial thickness into n equal sections (where n is an integer that is greater than or equal to 1); and each of said core sections is configured by laminating a first core section and a second core section that are each formed by aligning punching directions of said core segments and laminating said core segments to a thickness that divides said axial thickness into two equal sections, said first core section and said second core section being laminated such that said punching directions of said core segments are in opposite directions.