Power-generating magnetostrictive element and magnetostrictive power generation device

Patent metadata

Field	Value
Publication number	US-12588420-B2
Application number	US-202017788746-A
Country	US
Kind code	B2
Filing date	Dec 24, 2020
Priority date	Dec 25, 2019
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Task of the present invention is to provide a power-generating magnetostrictive element and a magnetostrictive power generation device equipped with the same, which are capable of achieving the same or a greater magnetostrictive power generation amount compared to conventional technology while employing materials lower in cost compared to conventional magnetostrictive materials. The task is achieved by providing a magnetostrictive element comprising a magnetostrictive part formed of an electromagnetic metal sheet. The present invention also provides a power-generating magnetostrictive element and a power-generating magnetostrictive element having high voltage with little variation. The task is achieved by providing a magnetostrictive element comprising a magnetostrictive part formed from a magnetostrictive material and a stress control part formed from an elastic material, the materials each having a Young's modulus and a sheet thickness simultaneously satisfying specific relationships.

First claim

The invention claimed is:

1 . A magnetostrictive element for power generation comprising a magnetostrictive part formed of a grain-oriented electrical steel having a {110} <100> GOSS texture and a stress control part formed of an elastic material laminated to the grain-oriented electrical steel sheet.

2 . The magnetostrictive element for power generation according to claim 1 , wherein, when the grain-oriented electrical steel sheet has a Young's modulus Em [GPa] and a sheet thickness tm [mm], and the elastic material has a Young's modulus Es [GPa] and a sheet thickness ts [mm], the magnetostrictive element simultaneously satisfies the relationships of the following Equations (1) and (2):

Em
<
Es

(
1
)

1.1
≤

Es
×

ts
2

Em
×

tm
2

.

(
2
)

3 . The magnetostrictive element for power generation according to claim 2 , wherein the elastic material is a non-magnetic material.

4 . The magnetostrictive element for power generation according to claim 1 , wherein the elastic material is a non-magnetic material.

5 . A magnetostrictive power generation device comprising:
the magnetostrictive element according to claim 1 having the magnetostrictive part formed of the grain-oriented electrical steel sheet having a {110} <100> GOSS texture and the stress control part formed of the elastic material; and a frame continuous with the magnetostrictive element for power generation, wherein at least a part of the frame is composed of a laminate comprising the grain-oriented electrical steel sheet extending from the magnetostrictive part and the elastic material extending from the stress control part.

6 . The magnetostrictive power generation device according to claim 5 , wherein whole of the frame is formed integrally with the grain-oriented electrical steel sheet extending from the magnetostrictive part.

7 . The magnetostrictive power generation device according to claim 5 , wherein whole of the frame is formed integrally with the elastic material extending from the stress control part.

8 . The magnetostrictive power generation device according to claim 5 , wherein whole of the frame is formed integrally with the magnetostrictive element for power generation.

9 . The magnetostrictive power generation device according to claim 5 , wherein the frame has a shape with at least one bent portion, and wherein, in the frame and the magnetostrictive element for power generation, the grain-oriented electrical steel sheet is positioned at an inner side of the magnetostrictive power generation device and the elastic material is positioned at an outer side of the magnetostrictive power generation device.

10 . The magnetostrictive power generation device according to claim 5 , wherein the frame has a shape with at least one bent portion, and wherein, in the frame and the magnetostrictive element for power generation, the elastic material is positioned at an inner side of the magnetostrictive power generation device and the grain-oriented electrical steel sheet is positioned at an outer side of the magnetostrictive power generation device.

11 . The magnetostrictive power generation device according to claim 5 , wherein:
the grain-oriented electrical steel sheet is configured such that a bias magnetic field is applied in <100> direction thereof.

12 . A magnetostrictive power generation device comprising a magnetostrictive element for power generation,
wherein magnetostrictive element comprises a magnetostrictive part formed of a grain-oriented electrical steel having a {110} <100> GOSS texture, and the grain-oriented electrical steel sheet is configured such that a bias magnetic field is applied in <100> direction thereof.

Assignees

• Nippon Steel Chemical & Mat Co Ltd

Inventors

• Sakamoto Hiroaki
• Tanabe Masao

Classifications

• H10N35/80

  Constructional details · CPC title

• H10N35/85

  Magnetostrictive active materials · CPC title

• C22C38/02

  containing silicon · CPC title

• H10N35/101 Primary

  with mechanical input and electrical output, e.g. generators, sensors · CPC title

• H02N2/186 Primary

  Vibration harvesters · CPC title