| 摘要 |
A dynamoelectric machine having a laminated core 10 comprises a plurality of annular laminations 12. Each lamination is edge rolled from straight strips of magnetic material with teeth 14 punched into one edge. Each lamination is slightly less than 360 DEG in arcuate length, leaving a slight gap 18 between its ends to allow the finished core to be accurately sized by compressing its outer surface. By punching the straight strips from sheet metal in such a way as to orient the grain structure in the direction of tooth extension and edge rolling the opposite edge, a selective grain orientation can be achieved which is magnetically advantageous throughout the core. <IMAGE> |
