Manufacturing method of core for rotary electric machine

Patent metadata

Field	Value
Publication number	US-11482912-B2
Application number	US-201816637913-A
Country	US
Kind code	B2
Filing date	Sep 28, 2018
Priority date	Sep 29, 2017
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A manufacturing method of a core for a rotary electric machine including forming a bridge portion, forming a stator side hole portion in at least a first portion of a portion of an electric steel plate in which a slot portion is formed. Then forming a rotor side hole portion in at least a part of a portion of the electric steel plate in which a hole portion is formed; and forming a rotor plate member and a stator plate member by blanking the electric steel plate.

First claim

The invention claimed is:

1. A manufacturing method of a core for a rotary electric machine comprising the steps of:
forming a rotor core by stacking a plurality of rotor plate members each having a hole portion;
forming a stator core by stacking a plurality of stator plate members each having a slot portion,
wherein in the forming of the rotor core and the stator core, each rotor plate member of the plurality of rotor plate members, and each stator plate member of the plurality of stator plate members are formed by a method comprising;
forming a bridge portion including forming a stator side hole portion in at least a first portion of a portion of an electric steel plate in which the slot portion is to be formed, and forming a rotor side hole portion in at least a part of a portion of the electric steel plate radially adjacent the stator side hole portion; and
forming a corresponding one of each of the rotor plate members and each of the stator plate members by blanking the electric steel plate, after the forming the bridge portion,
wherein the corresponding rotor plate member formed includes the bridge portion, and the corresponding stator plate member formed includes the slot portion obtained after the blanking from a same piece of the electric steel plate.

2. The manufacturing method of a core for a rotary electric machine according to claim 1 , wherein
the forming the stator side hole portion comprises forming the stator side hole portion by blanking the electric steel plate in a first direction so as to shear the electric steel plate in the first direction, and
the forming the rotor side hole portion comprises forming the rotor side hole portion by blanking the electric steel plate in the first direction so as to shear the electric steel plate in the first direction.

3. The manufacturing method of a core for a rotary electric machine according to claim 2 , wherein the forming the rotor plate member comprises forming the rotor plate member by blanking the electric steel plate in a second direction that is an opposite direction to the first direction so as to shear the rotor plate member in the first direction.

4. The manufacturing method of a core for a rotary electric machine according to claim 3 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the first portion and a connecting portion between a portion in which the bridge portion is formed and a portion in which the slot portion is formed.

5. The manufacturing method of a core for a rotary electric machine according to claim 4 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the connecting portion and the first portion so that the connecting portion and the first portion have at least one shape of a U shape, an L shape, or an I shape when viewed in plan.

6. The manufacturing method of a core for a rotary electric machine according to claim 2 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the first portion and a connecting portion between a portion in which the bridge portion is formed and a portion in which the slot portion is formed.

7. The manufacturing method of a core for a rotary electric machine according to claim 6 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the connecting portion and the first portion so that the connecting portion and the first portion have at least one shape of a U shape, an L shape, or an I shape when viewed in plan.

8. The manufacturing method of a core for a rotary electric machine according to claim 6 , wherein the forming the stator side hole portion comprises s forming the stator side hole portion by integrally blanking the connecting portion and the first portion while a width of the first portion in a circumferential direction is larger than a width of the connecting portion in a radial direction.

9. The manufacturing method of a core for a rotary electric machine according to claim 8 , wherein the forming the stator side hole portion comprises forming the stator side hole portion so that the width of the connecting portion in the radial direction is equal to or more than 0.4 mm and equal to or less than 0.8 mm.

10. The manufacturing method of a core for a rotary electric machine according to claim 1 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the first portion and a connecting portion between a portion in which the bridge portion is formed and a portion in which the slot portion is formed.

11. The manufacturing method of a core for a rotary electric machine according to claim 10 , wherein the forming the stator side hole portion comprises forming the stator side hole portion by integrally blanking the connecting portion and the first portion so that the connecting portion and the first portion have at least one shape of a U shape, an L shape, or an I shape when viewed in plan.

12. The manufacturing method of a core for a rotary electric machine according to claim 11 , wherein the forming the stator side hole portion comprises forming the stator side hole portion so that the width of the connecting portion in the radial direction is equal to or more than 0.4 mm and equal to or less than 0.8 mm.

13. The manufacturing method of a core for a rotary electric machine according to claim 10 , wherein the forming the stator side hole portion comprises forming the stator side hole portion so that the width of the connecting portion in the radial direction is equal to or more than 0.4 mm and equal to or less than 0.8 mm.

14. The manufacturing method of a core for a rotary electric machine according to claim 13 , wherein the forming the stator side hole portion comprises forming the stator side hole portion so that the width of the connecting portion in the radial direction is equal to or more than 0.4 mm and equal to or less than 0.7 mm.

15. The manufacturing method of a core for a rotary electric machine according to claim 1 , wherein the forming the stator side hole portion comprises forming the stator side hole portion in the first portion having a width in the circumferential direction that is smaller than a width of the slot portion in the circumferential direction.

16. The manufacturing method of a core for a rotary electric machine according to claim 1 , wherein the method forming each rotor plate member and each stator plate member further comprises blanking a second portion of the electric steel plate after the forming the stator side hole portion and before the forming the rotor plate member, the second portion including the stator side hole portion and being at least a part of a portion of the electric steel plate in which the slot portion is formed.

17. The manufacturing method of a core for a rotary electric machine according to claim 16 , wherein the blanking the second portion comprises integrally blanking the second portion that is at least a part of a portion in which a plurality of the slot portions are formed.

18. The manufacturing method of a core for a rotary electric machine according to claim 17 , wherein the forming the rotor plate member and the stator plate member comprises blanking the stator plate member from the electric steel plate after blanking the rotor plate member from the electric steel plate by cutting off a portion, which is different from the stator side hole portion and the second

Assignees

• Aisin Corp

Inventors

• Maki Masayuki
• Matsubara Tetsuya

Classifications

• H02K15/03 Primary

  having permanent magnets · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• B21D28/26

  in sheets or flat parts · CPC title

• H02K1/165

  Shape, form or location of the slots · CPC title