Novel stacking structure of high-capacity converter transformer iron core

Abstract

The invention discloses a novel lamination structure of a high-capacity converter transformer iron core, and particularly relates to the field of large transformer equipment, the high-capacity converter transformer iron core comprises an iron core lamination assembly, the iron core lamination assembly is composed of a core column lamination assembly, a side column lamination assembly and an iron yoke lamination assembly, the side column lamination assemblies are located on the outer side of the core column lamination assembly, the two iron yoke lamination assemblies are arranged corresponding to the top and the bottom of the core column lamination assembly, and the core column lamination assembly, the side column lamination assemblies and the iron yoke lamination assemblies each comprise a single lamination layer. According to the invention, the lamination structure is changed from one-time alternation of every two single-layer lamination layers in the prior art into one-time alternation of every single-layer lamination layer, so that the loss can be relatively reduced by 5%-10%, the operation efficiency is improved, the defects that the lamination operation of the existing high-capacity converter transformer iron core is complicated, time-consuming and labor-consuming are overcome, and the production cost is reduced. The device has the advantages of reliable structure, easiness in operation, time saving and labor saving, and is beneficial to rapid development of the transformer technology.

Description

Technical Field

[0001] The present invention relates to the technical field of large transformer equipment, and more specifically, to a novel stacking structure of the core of a large-capacity converter transformer. Background Art

[0002] A converter transformer is a power transformer used in a high-voltage direct-current power transmission system. Its main function is to convert alternating current electrical energy into direct current electrical energy, or convert direct current electrical energy into alternating current electrical energy, so as to efficiently transmit electrical energy between different power systems.

[0003] To form a complete iron core structure, it is usually necessary to stack multiple insulated iron core laminations of the converter transformer together and connect them through joints. In the prior art, the iron core joints of the converter transformer alternate every two layers. When stacking the iron core laminations, in order to overlap the joints of each layer between adjacent layers, an alternating lamination method is adopted to obtain a smaller no-load current and higher mechanical stability.

[0004] Since some magnetic flux lines in each layer bypass the joint air gap and penetrate into the adjacent layer, the reactive component of the no-load current is reduced compared with the case where the magnetic flux only flows in the same plane. However, due to the eddy current loss caused by the magnetic flux lines leaving the silicon steel sheet, the active component in the no-load current increases. Therefore, the structure with an alternating arrangement every two layers of the iron core joints of the converter transformer has high losses. Summary of the Invention

[0005] The novel stacking structure of the core of a large-capacity converter transformer provided by the present invention aims to solve the problem that the structure with an alternating arrangement every two layers of the iron core joints of the existing converter transformer has high losses.

[0006] To achieve the above object, the present invention provides the following technical solution: A novel stacking structure of the core of a large-capacity converter transformer. The core of the large-capacity converter transformer includes a total assembly of core laminations, which is composed of a core column lamination assembly, a side column lamination assembly, and a yoke lamination assembly. The side column lamination assembly is located outside the core column lamination assembly, and two sets of yoke lamination assemblies are provided corresponding to the top and bottom of the core column lamination assembly. The core column lamination assembly, the side column lamination assembly, and the yoke lamination assembly all include a single-layer lamination layer, and the single-layer lamination layers of the core column lamination assembly, the side column lamination assembly, and the yoke lamination assembly are located on the same layer.

[0007] In a preferred embodiment, the single-layer lamination layer of the core column lamination assembly is composed of two middle column whole pieces, and the two middle column whole pieces are located on the same layer. Each single middle column whole piece includes three middle column split pieces, and the three middle column split pieces are located on the same layer.

[0008] In a preferred embodiment, a single-layer laminated sheet layer of the side-column laminated sheet assembly is composed of two side-column laminated sheets, and the two side-column laminated sheets are located on the same layer.

[0009] In a preferred embodiment, a single-layer laminated sheet layer of the yoke laminated sheet assembly is composed of six yoke laminated sheets, and the six yoke laminated sheets are located on the same layer.

[0010] In a preferred embodiment, positioning holes are provided on the central-column patch, side-column laminated sheet, and yoke laminated sheet.

[0011] The beneficial effects of the present invention are as follows:

[0012] By changing the lamination structure from alternating every two single-layer laminated sheet layers in the prior art to alternating every single-layer laminated sheet layer, the present invention can relatively reduce the loss by 5% - 10% and improve the operation efficiency, solving the deficiencies of the cumbersome, time-consuming, and laborious core lamination operation of the existing large-capacity converter transformer, and having the advantages of reliable structure, easy operation, time-saving, and labor-saving, which is beneficial to the rapid development of transformer technology. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the core lamination structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the core-column laminated sheet and yoke laminated sheet structure of the present invention.

[0015] The reference numerals are: 1, total assembly of core laminations; 2, core-column laminated sheet assembly; 3, side-column laminated sheet assembly; 4, yoke laminated sheet assembly. Detailed Description of the Invention

[0016] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0017] Referring to the attached drawings Figure 1 and Figure 2 , a novel lamination structure of a large-capacity converter transformer core, the large-capacity converter transformer core includes a total assembly of core laminations 1, the total assembly of core laminations 1 is composed of a core-column laminated sheet assembly 2, a side-column laminated sheet assembly 3, and a yoke laminated sheet assembly 4. The side-column laminated sheet assembly 3 is located outside the core-column laminated sheet assembly 2, and two sets of yoke laminated sheet assemblies 4 are provided corresponding to the top and bottom of the core-column laminated sheet assembly 2. The core-column laminated sheet assembly 2, the side-column laminated sheet assembly 3, and the yoke laminated sheet assembly 4 all include single-layer laminated sheet layers, and the single-layer laminated sheet layers of the core-column laminated sheet assembly 2, the side-column laminated sheet assembly 3, and the yoke laminated sheet assembly 4 are located on the same layer.

[0018] It should be noted that the attached Figure 1 is a diagram after stacking is completed. There are two sets of central column lamination assemblies 2. The yoke lamination assembly 4 is divided into an upper yoke and a lower yoke corresponding to the top and bottom of the central column lamination assembly 2. The single-layer lamination layers of the two side column lamination assemblies 3 are respectively located on both sides of the single-layer lamination layer of the central column lamination assembly 2.

[0019] Furthermore, the single-layer lamination layer of the central column lamination assembly 2 is composed of two central column whole sheets, and the two central column whole sheets are located on the same layer. A single central column whole sheet includes three central column splicing pieces, and the three central column splicing pieces are located on the same layer.

[0020] Furthermore, the single-layer lamination layer of the side column lamination assembly 3 is composed of two side column laminations, and the two side column laminations are located on the same layer.

[0021] Furthermore, the single-layer lamination layer of the yoke lamination assembly 4 is composed of six yoke laminations, and the six yoke laminations are located on the same layer.

[0022] Furthermore, positioning holes are provided on the central column splicing pieces, side column laminations and yoke laminations.

[0023] In this embodiment, the implementation scenario is specifically as follows: The silicon steel sheet material is sheared according to the requirements of the design drawing to obtain central column splicing pieces, side column laminations and yoke laminations. Then, a punching device is used to punch the central column splicing pieces, side column laminations and yoke laminations to obtain positioning holes, which are convenient for positioning and limiting during stacking, thereby improving efficiency. Finally, the single-layer lamination layer is assembled. Two central column whole sheets are assembled into the single-layer lamination layer of the central column lamination assembly 2, two side column laminations are assembled into the single-layer lamination layer of the side column lamination assembly 3, and six yoke laminations are separated into three for each of the upper yoke and the lower yoke. When starting to stack the single-layer lamination layer, first place a single-layer lamination layer of the central column lamination assembly 2, then alternately place the single-layer lamination layers of the side column lamination assembly 3, and finally alternately place the single-layer lamination layers of the yoke lamination assembly 4. After stacking is completed, the remaining frame structures are assembled. As a whole, the stacking structure is changed from alternating every two single-layer lamination layers in the prior art to alternating every single-layer lamination layer, which can relatively reduce the loss by 5%-10% and improve the operation efficiency, solving the deficiencies of the cumbersome, time-consuming and laborious core stacking operation of the existing large-capacity converter transformer, and having the advantages of reliable structure, easy operation, time-saving and labor-saving, which is beneficial to the rapid development of transformer technology.

[0024] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A novel stacking structure of a large-capacity converter transformer core, characterized in that: The large-capacity converter transformer core comprises a core lamination assembly (1), wherein the core lamination assembly (1) comprises a core column lamination assembly (2), a side column lamination assembly (3) and an iron yoke lamination assembly (4), wherein the side column lamination assembly (3) is located outside the core column lamination assembly (2), and the iron yoke lamination assembly (4) is provided with two groups corresponding to the top and bottom of the core column lamination assembly (2), wherein the core column lamination assembly (2), the side column lamination assembly (3) and the iron yoke lamination assembly (4) all comprise a single-layer lamination layer, and the single-layer lamination layer of the core column lamination assembly (2), the single-layer lamination layer of the side column lamination assembly (3) and the single-layer lamination layer of the iron yoke lamination assembly (4) are located on the same layer; A single-layer laminate of the core column laminate assembly (2) is composed of two center column whole sheets, and the two center column whole sheets are located in the same layer, and a single center column whole sheet includes three center column pieces, and the three center column pieces are located in the same layer.

2. According to claim 1, the novel stacking structure of a large-capacity converter transformer core is characterized in that: The single-layer laminated layer of the side-column laminated assembly (3) is composed of two side-column laminated layers, and the two side-column laminated layers are located in the same layer.

3. The novel stacking structure of a large-capacity converter transformer core according to claim 2 is characterized in that: The single-layer lamination layer of the iron yoke lamination assembly (4) consists of six iron yoke laminations, and the six iron yoke laminations are located in the same layer.

4. The novel stacking structure of a large-capacity converter transformer core according to claim 3 is characterized in that: Positioning holes are provided on the center column pieces, the side column pieces and the iron yoke pieces.

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