Laminated iron core and method for manufacturing same
AssigneeMitsui High-Tec, Inc.
InventorsAkira Nagai, Jin Oda
Life of this patent
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Abstract
A laminated iron core and a method for manufacturing the same are provided to secure the lamination strength of the respective iron core pieces thereof, and to provide good magnetic efficiency and to reduce a loss. In a laminated iron core including a first caulking section formed in an area thereof having larger magnetic flux density than other area and a second caulking section formed in the other area, the engagement area A of the recessed sub-sections and projecting sub-sections of the first caulking sections of divided iron core pieces adjoining each other in the laminating direction is set smaller than the engagement area B of the recessed sub-sections and projecting sub-sections of the second caulking sections adjoining each other in the laminating direction.
Claims10
A laminated iron core, comprising:
- multiple iron core pieces caulked and laminated on each other, each iron core piece including a yoke piece and a magnetic pole shaft piece projecting from an inner periphery of the yoke piece;
- a first caulking section provided in an area of each of the iron core pieces where a density of magnetic flux passing therethrough is larger than in another area;
- and
- a second caulking section provided in the other area of the iron core piece, wherein
- the first caulking section and the second caulking section are provided in the yoke piece,
- a longitudinal direction of the first caulking section coincides with a longitudinal direction of the second caulking section, and
- an engagement area A of the first caulking section of the iron core piece mutually adjoining in a lamination direction is smaller than an engagement area B of the second caulking section mutually adjoining in the laminating direction.
A method for manufacturing a laminated iron core, comprising:
- providing a first caulking section in an area of each of iron core pieces where a density of magnetic flux passing therethrough is higher than in another area, and a second caulking portion in the other area;
- and
- laminating the iron core pieces on each other through the first and second caulking sections, wherein
- each iron core piece includes a yoke piece and a magnetic pole shaft piece projecting from an inner periphery of the yoke piece,
- the first caulking section and the second caulking section are provided in the yoke piece,
- a longitudinal direction of the first caulking section coincides with a longitudinal direction of the second caulking section, and
- an engagement area A of the first caulking section of each of the iron core pieces mutually adjoining in a laminating direction is set smaller than an engagement area B of the second caulking section of each of the iron core pieces mutually adjoining in the lamination direction.
Dependencies are inferred from the claim text.