CN-122026642-A - Stator core and motor

Abstract

The application provides a stator core and a motor, wherein the stator core comprises a first annular iron core lamination and a second annular iron core lamination which are arranged in a lamination mode along the axial direction of the stator core, and the first inner edge of the first annular iron core lamination and the second inner edge of the second annular iron core lamination are arranged in a staggered mode along the circumferential direction of the stator core. Through with the first inward flange of the first annular iron core lamination of lamination setting and the second inward flange dislocation set of second annular iron core lamination along stator core's circumference, reduce or avoid the possibility of mutual contact between first inward flange and the second inward flange to can weaken or avoid forming the electrically conductive passageway between first annular iron core lamination and the second annular iron core lamination, and then can reduce stator core's eddy current loss.

Inventors

• QIN XUEFEI
• YANG LEI
• ZHOU YUBIN

Assignees

• 美的集团股份有限公司
• 广东极亚精机科技有限公司

Dates

Publication Date

20260512

Application Date

20251225

Claims (16)

1. 1. A stator core, the stator core comprising: the first annular iron core lamination and the second annular iron core lamination are arranged in a lamination mode along the axial direction of the stator iron core; The first inner edge of the first annular iron core lamination and the second inner edge of the second annular iron core lamination are arranged in a staggered mode along the circumferential direction of the stator core.
2. 2. The stator core according to claim 1, wherein the first annular core lamination is provided with a first positioning portion, the second annular core lamination is provided with a second positioning portion, and the first positioning portion and the second positioning portion are used for arranging the first inner edge of the first annular core lamination and the second inner edge of the second annular core lamination in a staggered manner along the circumferential direction of the stator core.
3. 3. The stator core according to claim 2, wherein a positional relationship between the first positioning portion and the first inner edge is a first positional relationship, a positional relationship between the second positioning portion and the second inner edge is a second positional relationship, wherein the first positional relationship is inconsistent with the second positional relationship, and the first positioning portion and the second positioning portion are disposed in alignment in the circumferential direction.
4. 4. The stator core according to claim 2, wherein the positional relationship between the first positioning portion and the first inner edge is a first positional relationship, the positional relationship between the second positioning portion and the second inner edge is a second positional relationship, and wherein the first positional relationship is identical to the second positional relationship, and the first positioning portion and the second positioning portion are arranged in a staggered manner in the circumferential direction.
5. 5. The stator core as claimed in any one of claims 2 to 4 wherein the first locating portion is provided at a first outer edge of the first annular core lamination and the second locating portion is provided at a second outer edge of the second annular core lamination.
6. 6. The stator core of claim 2, wherein the first positioning portion and the first tooth portion of the first annular core stack are arranged in a radial direction of the stator core, and the second positioning portion and the second tooth portion of the second annular core stack are arranged in the radial direction.
7. 7. The stator core of claim 1, wherein the first annular core laminations are shaped and sized to conform to the shape and size of the second annular core laminations, respectively.
8. 8. The stator core according to claim 3 or 4, characterized in that the stator core further comprises: The third annular iron core lamination, with first annular iron core lamination with the second annular iron core lamination is followed the axial range upon range of setting, just the third annular iron core lamination the third inward flange with first inward flange with the second inward flange is at least followed stator core's circumference dislocation sets.
9. 9. The stator core according to claim 8, wherein the third annular core lamination is provided with a third positioning portion, and a positional relationship between the third positioning portion and the third inner edge is a third positional relationship, which is identical or inconsistent with the first positional relationship and the second positional relationship.
10. 10. The stator core of claim 1, wherein the first inner edge and the second inner edge are offset along a radial direction of the stator core.
11. 11. The stator core of claim 1, wherein the stator core comprises a plurality of the first annular laminations and a plurality of the second annular laminations, the first annular laminations and the second annular laminations being alternately stacked.
12. 12. The stator core of claim 1, wherein the stator core comprises a first stack of a plurality of the first annular core laminations and a second stack of at least one of the second annular core laminations; the first lamination stack and the second lamination stack are stacked in the axial direction.
13. 13. The stator core of claim 12, wherein the stator core includes a plurality of the first lamination groups and a plurality of the second lamination groups alternately stacked.
14. 14. The stator core of claim 12, wherein the plurality of sets of adjacently disposed first annular laminations are aligned with, partially aligned with, or non-aligned with the misalignment direction of the second annular laminations.
15. 15. The stator core of claim 1, wherein the material of the first annular core lamination is the same or different than the material of the second annular core lamination.
16. 16. An electric machine comprising a stator core as claimed in any one of claims 1 to 15.

Description

Stator core and motor Technical Field The application relates to the technical field of motors, in particular to a stator core and a motor. Background The stator core of the existing motor is generally made of soft magnetic material strips such as silicon steel and amorphous materials, and the materials are subjected to surface insulation treatment, then are cut into core lamination sheets through processes such as stamping, laser cutting or wire cutting, and are formed through lamination. However, during the cutting process, there are problems such as damage or peeling of the insulating layer at the inner edge of the core sheet, resulting in a decrease in the insulating property of the inner edge of the core sheet, and easy formation of a conductive path between the core sheets, resulting in a significant increase in eddy current loss. Disclosure of Invention In view of the above problems, the present application provides a stator core and a motor, which can weaken or avoid forming a conductive path between a first annular core lamination and a second annular core lamination, and reduce eddy current loss of the stator core. In order to solve the technical problems, the technical scheme adopted by the application is as follows: The application provides a stator core, which comprises a first annular iron core lamination and a second annular iron core lamination, wherein the first annular iron core lamination and the second annular iron core lamination are arranged in a lamination mode along the axial direction of the stator core, and the first inner edge of the first annular iron core lamination and the second inner edge of the second annular iron core lamination are arranged in a staggered mode along the circumferential direction of the stator core. Wherein, first annular iron core lamination is equipped with first location portion, and second annular iron core lamination is equipped with second location portion, and first location portion and second location portion are used for the first inward flange of the first annular iron core lamination of laminating setting and the second inward flange of second annular iron core lamination along stator core's circumference dislocation set. The first positioning part and the first inner edge are in a first position relationship, and the second positioning part and the second inner edge are in a second position relationship; the first positioning part and the second positioning part are aligned along the circumferential direction. The first positioning part and the first inner edge are in a first position relationship, and the second positioning part and the second inner edge are in a second position relationship; the first positioning part and the second positioning part are arranged in a staggered manner along the circumferential direction. Wherein, first locating part locates the first outward flange of first annular iron core lamination piece, and second locating part locates the second outward flange of second annular iron core lamination piece. The first positioning parts and the first tooth parts of the first annular iron core lamination are distributed along the radial direction of the stator core, and the second positioning parts and the second tooth parts of the second annular iron core lamination are distributed along the radial direction. Wherein, the shape, the size of first annular iron core lamination is unanimous with the shape, the size of second annular iron core lamination respectively. The stator core further comprises a third annular iron core lamination, the first annular iron core lamination and the second annular iron core lamination are axially overlapped, and a third inner edge of the third annular iron core lamination, the first inner edge and the second inner edge are arranged in a staggered mode at least along the circumferential direction of the stator core. The third annular iron core lamination is provided with a third positioning part, the position relationship between the third positioning part and the third inner edge is a third position relationship, and the third position relationship is consistent or inconsistent with the first position relationship and the second position relationship. The first inner edge and the second inner edge are arranged in a staggered mode along the radial direction of the stator core. The stator core comprises a plurality of first annular iron core lamination pieces and a plurality of second annular iron core lamination pieces, and the first annular iron core lamination pieces and the second annular iron core lamination pieces are alternately laminated. The stator core comprises a first lamination group formed by laminating a plurality of first annular iron core lamination sheets and a second lamination group formed by at least one second annular iron core lamination sheet, wherein the first lamination group and the second lamination group are axially laminated. The stator core comprises a plurality of