Laminations for electric motors and method of manufacturing the same

摘要

The present invention relates to a stackable lamination (1) for rotors of electric motors having inclined or helical slots, and a method for manufacturing the lamination. The lamination comprises at least one boss (4) projecting from a face thereof for coupling with a second lamination (1') in the same pack. The two coupled laminations are rotated according to an offset angle (Æ). Advantageously, a boss portion has a lower thickness (H1) than the remaining portions (42,43) to allow the same boss to be coupled with a matching boss (4') of the second lamination (1'), the two coupled bosses being angularly offset according to a preset angle. The reduction in the boss thickness is carried out during the manufacturing step of the lamination.