| 摘要 |
PROBLEM TO BE SOLVED: To reduce an iron loss generated in the teeth of a stator iron core, to facilitate cooling, to increase rigidity of the stator iron core without making its outside diameter larger, to make the number of natural apparent motion of annular vibration, and moreover to reduce the amplitude of the annular vibration of the iron core more with respect to the same electromagnetic exciting force. SOLUTION: This stator iron core for rotating electric machines which is formed by laminating rolled steel sheets into a cylindrical shape has teeth in the shape of a comb into which stator coils are inserted, and core back sections into which the overall magnetic flux passes. Oriented steel sheet 10 which let magnetic flux pass in its rolled direction easily, and non-oriented steel sheets 11 which do not have a specific direction in which magnetic flux is easy to pass are used as steel sheets, and these are laminated alternately. Consequently, it becomes possible to reduce the iron loss in the stator iron core, especially in the teeth sections, more sharply than before and to provide a rotating electric machine having a superior cooling performance and a smaller loss, i.e., a higher efficiency.
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