Amorphous core transformer

Patent metadata

Field	Value
Publication number	US-9514877-B2
Application number	US-201314417209-A
Country	US
Kind code	B2
Filing date	Jun 14, 2013
Priority date	Jul 27, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

During the assembly process of an amorphous core transformer, when an offset has arisen between a coil and the amorphous core, and when an offset has arisen between the coil and the core due to a shock resulting from unloading or vibrations during transport, there has been the risk of breakage of an insulating member between an amorphous core and a coil, causing amorphous fragments to be scattered. The object of the present invention is to prevent scattering of amorphous fragments. The amorphous core transformer, which results from assembling a coil and an amorphous core having a joint section, is characterized by folding an insulating member having a rectangular cylinder and flanges, inserting the folded insulating member into the hole of the coil, expanding the cylinder and the flanges of the insulating member, disconnecting the joint section of the amorphous core, inserting the open-ended amorphous core into the cylinder of the insulating member placed within the coil, lapping the disconnected joint section of the amorphous core, and covering/wrapping yokes of the amorphous core with the flanges of the insulating member.

First claim

The invention claimed is:

1. A method for assembling an insulating member, an amorphous core, and a coil of an amorphous core transformer, the insulating member having a rectangular cylinder and flanges and having a first dimension, the amorphous core having a joint section, and the coil having a hole, wherein the method comprises:
folding the rectangular cylinder and flanges of the insulating member, the folded insulating member having a second dimension smaller than the first dimension;
inserting the folded insulating member into the hole of the coil;
expanding the rectangular cylinder and the flanges of the folded insulating member;
disconnecting the joint section of the amorphous core;
inserting an open-ended portion of the amorphous core into the rectangular cylinder of the expanded insulating member within the coil;
lapping the disconnected joint section of the amorphous core; and
covering yokes of the amorphous core with the flanges of the insulating member.

2. The method of claim 1 , wherein
each of the flanges has at a center thereof an x-shaped cut fitting within an opening of the rectangular cylinder, and further comprising adhering resultant triangular flaps to both ends of the rectangular cylinder.

3. The method of claim 2 , wherein
the triangular flaps of the flange disposed on the side through which the amorphous core is inserted are stuck to inner or outer surfaces of the rectangular cylinder, while the triangular flaps of the flange disposed on the side from which the amorphous core comes out are stuck to the outer surfaces of the rectangular cylinder.

4. The method of claim 2 , wherein the step of folding further comprises:
making a valley fold at each of the short-side centers of the rectangular cylinder such that both parts adjacent to the valley fold are folded in a direction perpendicular to an axial direction of the rectangular cylinder;
making a valley fold at each of the short-side centers of the flanges, and flattening the cylinder and the flanges;
bending the flanges disposed at both ends inward; and
folding the rectangular cylinder and the flanges along a line being in a symmetrical position.

5. The method of claim 1 , wherein the step of expanding the rectangular cylinder of the folded insulating member in the core of the coil comprises:
inserting an airbag into the rectangular cylinder; and
expanding the airbag by feeding air to the airbag, thereby making the cylinder.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Homma Toru
• Takahashi Toshiaki
• Mikoshiba Ryosuke
• Sato Tatsunori

Classifications

• H01F27/26 Primary

  Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) · CPC title

• H01F27/324

  Insulation between coil and core, between different winding sections, around the coil; Other insulation structures · CPC title

• H01F41/0226

  from amorphous ribbons · CPC title

• H01F27/32 Primary

  Insulating of coils, windings, or parts thereof · CPC title

• H01F27/25

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