Stationary induction apparatus core

Patent metadata

Field	Value
Publication number	US-10665381-B2
Application number	US-201815861731-A
Country	US
Kind code	B2
Filing date	Jan 4, 2018
Priority date	Jan 19, 2017
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

An object of the present invention is to improve a mechanical strength and to ensure a low magnetic loss without using a supporting member even when amorphous ribbons are used for an inner core. To attain the object, a stationary induction apparatus core of the present invention includes an inner core formed from the amorphous ribbons and outer cores formed from silicon steel sheets, the outer cores being disposed on two sides of the inner core in a depth direction as opposed to a standing direction of the inner core in such a manner as to sandwich the inner core therebetween.

First claim

What is claimed is:

1. A stationary induction apparatus core, comprising:
an inner core formed from amorphous ribbons; and
outer cores formed from silicon steel sheets, the outer cores being disposed on two sides of the inner core in a depth direction as opposed to a standing direction of the inner core in such a manner as to sandwich the inner core therebetween and on a side of the inner core in a lateral direction of the inner core.

2. The stationary induction apparatus core according to claim 1 , wherein
the inner core is a wound core obtained by winding up the amorphous ribbons, and
the outer cores are each a stacked core obtained by stacking the silicon steel sheets while being offset stepwise by a constant amount.

3. The stationary induction apparatus core according to claim 2 , wherein
an outer peripheral side of each corner portion of the stacked core is allowed to have a curvature or the corner portion of the stacked core is partially cut off.

4. The stationary induction apparatus core according to claim 2 , wherein
an insulating material lies between the wound core and the stacked core.

5. The stationary induction apparatus core according to claim 2 , wherein
a silicon steel sheet is disposed between an outermost periphery of the stacked core and an innermost periphery of the wound core.

6. The stationary induction apparatus core according to claim 2 , wherein
a yoke section that is the stacked core is divided into two, and a gap is provided in a core joint section formed by dividing the yoke section into two.

7. The stationary induction apparatus core according to claim 2 , wherein
a load distribution guide is provided between the wound core and the stacked core.

8. The stationary induction apparatus core according to claim 2 , wherein
a step-lap joint section is formed in each corner portion of the stacked core.

9. The stationary induction apparatus core according to claim 8 , wherein
a gap formed between the silicon steel sheets in the step-lap joint section has a gap length at which a magnetic resistance of the wound core is equal to a magnetic resistance of the stacked core.

10. The stationary induction apparatus core according to claim 2 , wherein a protective material is disposed between the stacked core and the wound core.

11. The stationary induction apparatus core according to claim 10 , wherein the protective material is a silicon steel sheet.

12. The stationary induction apparatus core according to claim 11 , wherein the protective material is disposed between an outermost periphery of the stacked core and an innermost periphery of the wound core.

Assignees

• Hitachi Ltd

Inventors

• Kobayashi Chie
• Kurita Naoyuki
• Yamagishi Akira

Classifications

• H01F27/263

  Fastening parts of the core together · CPC title

• H01F3/02

  made from sheets · CPC title

• H01F27/25 Primary

  made from strips or ribbons (H01F27/26 takes precedence) · CPC title

• H01F2003/106

  Magnetic circuits using combinations of different magnetic materials · CPC title

• H01F41/0226

  from amorphous ribbons · CPC title