Magnetic-plate laminated body and motor

• US 10,461,589 B2
• Filed: 02/07/2017
• Issued: 10/29/2019
• Est. Priority Date: 02/09/2016
• Status: Active Grant

• Current Assignee: Alps Alpine Co., Ltd., Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Tohoku Magnet Institute Co., Ltd.
• Inventors: Makino, Akihiro, Nishiyama, Nobuyuki, Nishikawa, Yukio, Kojima, Tohru, Ogawa, Takeshi
• Primary Examiner(s): Nguyen, Hanh N
• Application Number:
  US15/426,351
• Publication Number:
  US 20170229930A1
• Time in Patent Office: 994 Days
• Field of Search: 310216001-216137
• CPC Class Codes: H02K 1/02 characterised by the magnetic material
• CPC Class Codes: H02K 1/146 consisting of a generally annular yoke with salient poles
• CPC Class Codes: H02K 1/22 Rotating parts of the magnetic circuit
• CPC Class Codes: H02K 3/18 Windings for salient poles

Abstract

A magnetic-plate laminated body includes: a laminated part made up of a plurality of laminated soft magnetic ribbons; first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastening the laminated part by the first and second metal plates.

Claims

1. A magnetic-plate laminated body comprising:

a laminated part made up of a plurality of laminated soft magnetic ribbons;

first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and

a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastens the laminated part to the first and second metal plates,

wherein the soft magnetic ribbons have surfaces with wrinkles such that adjacent pairs of the soft magnetic ribbons locally contact each other and have clearances between the wrinkles where the soft magnetic ribbons contact each other.

2. The magnetic-plate laminated body according to claim 1, wherein the first and second metal plates have soft magnetic property.

3. The magnetic-plate laminated body according to claim 1, wherein the first and second metal plates have non-magnetic property.

4. The magnetic-plate laminated body according to claim 1, wherein a plate thickness of each of the first and second metal plates is at least six times as thick as each of the soft magnetic ribbons and is equal to or less than 20% of a thickness of the laminated body.

5. A motor comprising:

a rotor; and

a stator made up of the magnetic-plate laminated body according to claim 1, the stator having the rotor rotatably stored therein.

6. A magnetic-plate laminated body comprising:

a laminated part made up of a plurality of laminated soft magnetic ribbons;

first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and

a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastens the laminated part to the first and second metal plates,

wherein the first metal plate, the second metal plate and the laminated part have a same outer shape,

wherein the soft magnetic ribbons each have a thickness of 0.01 mm or more and 0.1 mm or less,

wherein the soft magnetic ribbons have surfaces with wrinkles such that adjacent pairs of the soft magnetic ribbons locally contact each other and have clearances between the wrinkles where the soft magnetic ribbons contact each other, and

wherein the soft magnetic ribbons have a space factor defined as a volume percentage equal to or greater than 70% relative to the laminated part with a balance being the clearances.

7. A magnetic-plate laminated body comprising:

a laminated part made up of a plurality of laminated soft magnetic ribbons;

first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part; and

a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastens the laminated part to the first and second metal plates,

wherein the first and second metal plates are formed by laminating two or more metal plates having a same outer shape.

8. The magnetic-plate laminated body according to claim 7, wherein at least one of the two or more metal plates of the first and second metal plates is an electromagnetic steel plate.

9. The magnetic-plate laminated body according to claim 7, wherein all of the two or more metal plates of the first and second metal plates are electromagnetic steel plates.

10. A magnetic-plate laminated body comprising:

a laminated part made up of a plurality of laminated soft magnetic ribbons;

first and second metal plates that sandwich the laminated part from upper and lower surfaces in a lamination direction of the laminated part;

a fastening mechanism that penetrates the first and second metal plates and the laminated part and fastens the laminated part to the first and second metal plates; and

a third metal plate provided between two of the plurality of laminated soft magnetic ribbons in the laminated part.