CN112635176A

CN112635176A - Noise reduction method for amorphous alloy iron core

Info

Publication number: CN112635176A
Application number: CN202011374202.4A
Authority: CN
Inventors: 陈杨; 张志键; 顾伟; 施闻博; 田野; 郝柱; 杨建平
Original assignee: Shanghai Zhixin Rigang Electric Co ltd; Shanghai Zhixin Electric Co Ltd
Current assignee: Shanghai Zhixin Rigang Electric Co ltd; Shanghai Zhixin Electric Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-09

Abstract

The invention discloses a noise reduction method for an amorphous alloy iron core in the technical field of transformer iron cores, and aims to solve the problems that the noise of the amorphous alloy iron core is difficult to control and more fragments exist in the prior art. The method is characterized in that two protective layers are adhered to an inner frame of an iron core in a welding or bonding mode, and the protective layers are smooth metal sheets so as to reduce the friction force between a coil and the iron core. According to the invention, the iron core inner frame is wrapped in the amorphous alloy transformer through the two protective layers, so that the amorphous alloy transformer can play a role in protecting the amorphous alloy iron core inner frame, when the amorphous alloy transformer is in short circuit, the two protective layers wrapped by the amorphous alloy iron core inner frame are in direct contact with the winding, iron core fragments are reduced, and the problem of overlarge noise caused by self stress of the iron core can be avoided. The method is simple and convenient, saves cost and is easy to realize.

Description

Noise reduction method for amorphous alloy iron core

Technical Field

The invention relates to a noise reduction method for an amorphous alloy iron core, and belongs to the technical field of transformer iron cores.

Background

The transformer adopting the amorphous alloy iron core has been widely used at present due to the remarkable energy-saving and environment-friendly properties. The amorphous alloy iron core has the advantages of low loss and the disadvantages of high noise and more scraps.

The amorphous alloy iron core is an iron core with a novel structure, and is formed by rolling an amorphous alloy strip with a soft magnetic characteristic, the amorphous alloy has the characteristics of high resistivity, thin thickness, sensitivity to mechanical profit and the like, the noise of the amorphous alloy is difficult to control due to the special characteristics of the amorphous alloy, more fragments are generated, and particularly, the fragments of the iron core after short circuit easily cause unqualified insulation resistance.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a noise reduction method for an amorphous alloy iron core.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme:

a noise reduction method for an amorphous alloy iron core is suitable for a lap joint type rectangular iron core, and the method is characterized in that two protective layers are adhered to an inner frame of the iron core in a welding or bonding mode, and the protective layers are smooth metal sheets so as to reduce friction force between a coil and the iron core.

The protective layer can be a silicon steel sheet, the thickness of the protective layer is 0.2-0.5 mm, and the preferable thickness is 0.27 mm.

The first layer of the protective layer is close to the inner frame of the iron core and extends for a section of stacking section after surrounding a circle; the second layer of the protective layer is close to the first layer, and extends for a section of stacking section after encircling a circle, so that the iron core can be completely wrapped; the overlapping section is welded and fastened in a spot welding mode, and the firmness of the protective layer is improved.

Furthermore, the starting end and the tail end of the first layer and the second layer are both located at an iron yoke part of the rectangular iron core, generally located at an upper yoke of the iron core and opposite to the lap joint of the iron core, and the length of the overlapping section is smaller than the width of the inner frame of the iron core.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the iron core inner frame is wrapped in the amorphous alloy transformer through the two protective layers, so that the amorphous alloy transformer can play a role in protecting the amorphous alloy iron core inner frame, when the amorphous alloy transformer is in short circuit, the two protective layers wrapped by the amorphous alloy iron core inner frame are in direct contact with the winding, iron core fragments are reduced, and the problem of overlarge noise caused by self stress of the iron core can be avoided. The method is simple and convenient, saves cost and is easy to realize.

Drawings

Fig. 1 is a schematic structural diagram of an amorphous alloy iron core to which a protective layer is attached according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a first layer of a protection layer according to an embodiment of the present invention, and a second layer surrounds the first layer in the same manner.

Fig. 3 is a schematic diagram of a stack of protective layers according to an embodiment of the present invention.

In the figure: 1-iron core, 2-protective layer, 21-first layer, 22-second layer, and 3-stacking section.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Examples

A noise reduction method of an amorphous alloy iron core is used for a lap joint type rectangular iron core, and two protective layers 2 are pasted on an inner frame of an iron core 1 in a welding mode, as shown in figure 1. The protective layer 2 is a silicon steel sheet, and the thickness is 0.27 mm. The first layer 21 of the protective layer 2 is close to the inner frame of the iron core 1, and extends a section of the overlapping section 3 after surrounding a circle, as shown in fig. 2; the second layer 22 of the protective layer 2 is close to the first layer 21 and extends for a section of the overlapping section 3 after encircling one circle; and the overlapping section 3 is welded and fastened in a spot welding mode.

In this embodiment, the starting end and the tail end of the first layer 21 and the second layer 22 are both located on the upper yoke of the rectangular iron core 1 and opposite to the lap joint of the iron core 1, as shown in fig. 3, the length of the overlapping section 3 is smaller than the width of the inner frame of the iron core 1.

In the embodiment, the length of the inner frame of the rectangular iron core 1 is a, the width of the inner frame of the rectangular iron core 1 is B, and the size of the first layer 21 is the same as that of the inner frame of the iron core 1, namely, the length of the first layer is a, and the width of the first layer is B; the second layer 22 has a length of A-0.81mm and a width of B-0.54 mm; the length of the superposed section 3 of the two layers of silicon steel sheets is B-20mm, namely the distance between the starting end and the tail end is 10mm from the two sides of the inner frame.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A noise reduction method of an amorphous alloy iron core is suitable for a lap joint type rectangular iron core and is characterized in that two protective layers (2) are adhered to an inner frame of the iron core (1) in a welding or bonding mode, and the protective layers (2) are smooth metal sheets.

2. The method of claim 1, wherein the protective layer (2) is a silicon steel sheet with a thickness of 0.2-0.5 mm.

3. The method of claim 2, wherein the silicon steel sheet has a thickness of 0.27 mm.

4. The method of claim 1, wherein the first layer (21) of the protective layer (2) is close to the inner frame of the iron core (1) and extends a segment of the overlapping section (3) after surrounding a circle; the second layer (22) of the protective layer (2) is adjacent to the first layer (21) and extends a section of the overlapping section (3) after encircling one circle.

5. The method of claim 4, wherein the starting end and the end of the first layer (1) and the second layer (2) are both located at the iron yoke portion of the rectangular iron core (1), and the length of the stacking section (3) is smaller than the width of the inner frame of the iron core (3).

6. The method of reducing noise of amorphous alloy iron core according to claim 5, wherein the overlapping section (3) is welded and fastened by spot welding.