Core for stationary induction apparatus

Patent metadata

Field	Value
Publication number	US-10978237-B2
Application number	US-201815879055-A
Country	US
Kind code	B2
Filing date	Jan 24, 2018
Priority date	Feb 13, 2017
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

The invention provides a core for a stationary induction apparatus including an amorphous core formed of an amorphous thin magnetic strip arranged inside the core, a silicon steel sheet core formed of a silicon steel sheet arranged on a side surface of the amorphous core, a wear plate arranged on the outermost peripheral surface of the silicon steel sheet core, an amorphous core frame arranged around the amorphous core including a space between the amorphous core and the silicon steel sheet core, and a support frame which supports and fixes the amorphous core and the silicon steel sheet core via the wear plate.

First claim

What is claimed is:

1. A core for a stationary induction apparatus comprising:
an amorphous core with a rectangular cross section formed of an amorphous thin magnetic strip arranged inside the core,
a silicon steel sheet core formed of a silicon steel sheet arranged so as to face only a pair of opposite side surfaces of the amorphous core with the rectangular cross section,
a wear plate arranged on the outermost peripheral surface of the silicon steel sheet core,
an amorphous core frame arranged around the amorphous core including a space between the amorphous core and the silicon steel sheet core, and
a support frame which supports and fixes the amorphous core and the silicon steel sheet core via the wear plate,
wherein the amorphous core is an amorphous wound core in which an amorphous thin magnetic strip is wound in a roughly rectangular shape, a minimum unit of the amorphous wound core being formed by dividing the amorphous magnetic strip into a plurality of bundles and arranging them vertically and horizontally when the amorphous core is horizontally cross-sectioned and viewed from a plan view,
the silicon steel sheet core is a silicon steel-stacked block core formed by stacking the silicon steel sheets and forming a step-lap joint structure at a corner, and
the amorphous core frame is made of iron and has openings at the top and bottom through which the amorphous core passes, and an insulator is interposed between the amorphous core frame made of iron and the amorphous core.

2. The core for a stationary induction apparatus according to claim 1 ,
wherein the silicon steel-stacked block core is configured such that a width decreases sequentially from the amorphous core side toward the wear plate side.

3. The core for a stationary induction apparatus according to claim 1 ,
wherein the support frame is arranged in a transverse direction on an upper portion and a lower portion of an outer peripheral surface of the wear plate, and the support frame arranged in the transverse direction supports and fixes the amorphous core and the silicon steel sheet core via the wear plate.

4. The core for a stationary induction apparatus according to claim 3 ,
wherein the support frame arranged in a transverse direction on an upper portion and a lower portion of the outer peripheral surface of the wear plate is connected by a second support frame arranged between the upper and the lower sides of the support frame.

5. The core for a stationary induction apparatus according to claim 1 ,
wherein the support frame is made of a nonmagnetic material or a magnetic material, and when the support frame is made of a magnetic material, a nonmagnetic material is interposed in a part of the magnetic material.

6. The core of a stationary induction apparatus according to claim 1 ,
wherein the wear plate is a quadrangle where a portion equivalent to a window of the core is cut out corresponding to the shape of the silicon steel sheet core.

7. The core for a stationary induction apparatus according to claim 1 ,
wherein the wear plate is integrally formed or divided into a plurality of parts.

8. The core for a stationary induction apparatus according to claim 1 ,
wherein the wear plate is made of iron or a nonmagnetic material, and when the wear plate is made of iron, a slit is provided in the wear plate.

9. The core for a stationary induction apparatus according to claim 1 ,
wherein the amorphous core frame is made of a nonmagnetic material or a magnetic material, and when the amorphous core frame is made of a magnetic material, a nonmagnetic material is interposed in a part of the magnetic material.

Assignees

• Hitachi Ltd

Inventors

• Kobayashi Chie
• Nishimizu Akira
• Kurita Naoyuki
• Yamagishi Akira

Classifications

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F27/263

  Fastening parts of the core together · CPC title

• H01F3/10

  Composite arrangements of magnetic circuits · CPC title

• H01F27/30

  Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support · CPC title

• H01F2003/106

  Magnetic circuits using combinations of different magnetic materials · CPC title