Stator, motor, and method for manufacturing stator
AssigneeNidec Corporation
InventorsAkira ICHIEN, Yusuke ARAO
Life of this patent
Estimating the term…
Abstract
A stator is formed by laminating electrical steel sheets punched into a predetermined shape. The stator includes split cores that are punched out from the electrical steel sheets to have an annular shape. A first group of the split cores adjacent to each other in the circumferential direction have the same rolling direction, and a second group of the split cores adjacent to each other in the circumferential direction have different rolling directions.
Claims16
A stator comprising:
- a laminate including electrical steel sheets punched into a specific shape;
- and
- a plurality of split cores each with an annular shape;
- wherein
- a first group of the plurality of split cores adjacent to each other in a circumferential direction have a same rolling direction, and a second group of the plurality of split cores adjacent to each other in the circumferential direction have different rolling directions.
A method for manufacturing a stator including X split cores punched out from an electrical steel sheet to have an annular shape, where X is a natural number of two or more, the method comprising:
- punching out the split cores from the electrical steel sheet in group units of Y less than X with arc-shaped core backs extending in a same circumferential direction and connected to each other, where Y is a natural number of two or more.
Dependencies are inferred from the claim text.