ARMATURE

• US 20190131829A1
• Filed: 03/28/2018
• Published: 05/02/2019
• Est. Priority Date: 11/01/2017
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: HINO, Tatsuro, MORI, Akihito, HIROTA, Yutaka, NAKAMURA, Masashi
• Granted Patent: US 10,644,547 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 1/16 Stator cores with slots for windings
• CPC Class Codes: H02K 1/18 Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• CPC Class Codes: H02K 15/024 with slots
• CPC Class Codes: H02K 15/028 for fastening to casing or support, respectively to shaft or hub
• CPC Class Codes: H02K 2213/03 Machines characterised by numerical values, ranges, mathematical expressions or similar information
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/48 in slots

Abstract

An armature core is configured by arranging into an annular shape: at least one first core segment that includes: a first core back portion; a first tooth portion; and a mounting portion that is formed on an outer circumferential portion of the first core back portion; and a plurality of second core segments that include: a second core back portion; and a second tooth portion; the mounting portion includes projecting portions that project on two circumferential sides from the first core back portion; and the first core segments and the second core segments that are adjacent to each other are fixed in a state in which facing side surfaces between the first core back portions and the second core back portions contact each other, and inner circumferential surfaces of the projecting portions and outer circumferential surfaces of the second core back portions are in contact.

Claims

1. An armature comprising:

an annular armature core; and

an armature winding that is mounted to said armature core, wherein;

said armature core is configured by arranging into an annular shape;

at least one first core segment that comprises;

a circular arc-shaped first core back portion;

a first tooth portion that extends radially inward from an inner circumferential surface of said first core back portion;

a mounting portion that is formed on an outer circumferential portion of said first core back portion; and

a penetrating aperture that passes axially through said mounting portion; and

a plurality of second core segments that comprise;

a circular arc-shaped second core back portion; and

a second tooth portion that extends radially inward from an inner circumferential surface of said second core back portion;

said mounting portion comprises projecting portions that project on two circumferential sides from said first core back portion; and

said first core segments and said second core segments that are adjacent to each other are fixed in a state in which facing side surfaces between said first core back portions and said second core back portions contact each other, and inner circumferential surfaces of said projecting portions and outer circumferential surfaces of said second core back portions are in contact.

2. The armature according to claim 1, wherein:

an interfitting protruding portion is formed on a first side surface of facing side surfaces of said first core back portions and said second core back portions, and an interfitting recess portion that fits together with said interfitting protruding portion is formed on a second side surface of said facing side surfaces of said first core back portions and said second core back portions; and

surfaces of said interfitting protruding portion and said interfitting recess portion that face each other in a radial direction are in contact.

3. The armature according to claim 1, wherein:

an interfitting protruding portion is formed on an inner circumferential surface of said projecting portions, and an interfitting recess portion that fits together with said interfitting protruding portion is formed on an outer circumferential surface of said second core back portions; and

surfaces of said interfitting protruding portion and said interfitting recess portion that face each other in a circumferential direction are in contact.

4. The armature according to claim 1, wherein said first core back portions and said second core back portions that are adjacent to each other overlap axially.

5. The armature according to claim 1, wherein said first core back portions and said second core back portions that are adjacent to each other are welded.

6. The armature according to claim 1, wherein an annular end plate is disposed on an axial end portion of said first core segments and said second core segments that are arranged in an annular shape.

7. The armature according to claim 1, wherein a filler is inserted into at least a portion between said first tooth portions and said second tooth portions that are adjacent to each other, between said first core back portions and said second core back portions that are adjacent to each other, and between said second core back portions that are adjacent to each other.

8. The armature according to claim 1, wherein a circumferential width B1 of said mounting portion is configured so as to satisfy:

B1>

π

×

D/N

where D is a diameter of said second core back portion, N is a total number of said first core segments and said second core segments, and circumferential widths of said first core back portion and said second core back portions are equal.

9. The armature according to claim 2, wherein said first core back portions and said second core back portions that are adjacent to each other overlap axially.

10. The armature according to claim 2, wherein said first core back portions and said second core back portions that are adjacent to each other are welded.

11. The armature according to claim 2, wherein an annular end plate is disposed on an axial end portion of said first core segments and said second core segments that are arranged in an annular shape.

12. The armature according to claim 2, wherein a filler is inserted into at least a portion between said first tooth portions and said second tooth portions that are adjacent to each other, between said first core back portions and said second core back portions that are adjacent to each other, and between said second core back portions that are adjacent to each other.

13. The armature according to claim 2, wherein a circumferential width B1 of said mounting portion is configured so as to satisfy:

B1>

π

×

D/N

where D is a diameter of said second core back portion, N is a total number of said first core segments and said second core segments, and circumferential widths of said first core back portion and said second core back portions are equal.

14. The armature according to claim 3, wherein said first core back portions and said second core back portions that are adjacent to each other overlap axially.

15. The armature according to claim 3, wherein said first core back portions and said second core back portions that are adjacent to each other are welded.

16. The armature according to claim 3, wherein an annular end plate is disposed on an axial end portion of said first core segments and said second core segments that are arranged in an annular shape.

17. The armature according to claim 3, wherein a filler is inserted into at least a portion between said first tooth portions and said second tooth portions that are adjacent to each other, between said first core back portions and said second core back portions that are adjacent to each other, and between said second core back portions that are adjacent to each other.

18. The armature according to claim 3, wherein a circumferential width B1 of said mounting portion is configured so as to satisfy:

B1>

π

×

D/N

where D is a diameter of said second core back portion, N is a total number of said first core segments and said second core segments, and circumferential widths of said first core back portion and said second core back portions are equal.