CN116344169A - Iron core structure for reducing stray loss of oil immersed transformer - Google Patents
Iron core structure for reducing stray loss of oil immersed transformer Download PDFInfo
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- CN116344169A CN116344169A CN202310307864.7A CN202310307864A CN116344169A CN 116344169 A CN116344169 A CN 116344169A CN 202310307864 A CN202310307864 A CN 202310307864A CN 116344169 A CN116344169 A CN 116344169A
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- iron core
- parts
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- splice
- immersed transformer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to the technical field of transformers, in particular to an iron core structure for reducing stray loss of an oil immersed transformer, which comprises the following components: stacking a plurality of layers of iron chips, wherein each layer of iron chips comprises a plurality of components, and the components are mutually spliced to form a set shape of a layer; the clamping piece is used for fixing the iron chips stacked into a plurality of layers; wherein, in the iron core piece of a plurality of levels along stacking direction, a plurality of parts splice dislocation each other. According to the invention, each layer of iron core sheet comprises a plurality of mutually spliced components, the mutually spliced components form the set shape of the layer, when the iron core sheet is stacked, the mutually spliced components in the iron core sheets of different layers are mutually staggered at the splicing position, so that the splicing seams of the iron cores are mutually staggered on the cross section, an electromagnetic field can be blocked by the iron core sheet at the next layer after passing through the splicing seams of the layer, a good magnetism isolating effect is achieved, magnetic leakage is reduced, stray loss is reduced, and the performance of the transformer is improved.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an iron core structure for reducing stray loss of an oil immersed transformer.
Background
The iron core is a main magnetic circuit part in the transformer, is generally formed by stacking hot-rolled or cold-rolled silicon steel sheets with high silicon content and insulating paint coated on the surfaces, and then is fixed through clamping pieces, the iron core and coils wound on the iron core form a complete electromagnetic induction system, and the transmission power of the power transformer depends on the material and the cross section area of the iron core. Therefore, the core structure is generally laminated.
Common oil-immersed transformer's among the prior art iron core structure stray loss is higher, influences oil-immersed transformer's function.
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 provides an iron core structure for reducing stray loss of an oil immersed transformer, and accordingly the problem in the background technology is effectively solved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an oil immersed transformer reduces stray loss's iron core structure, includes:
stacking a plurality of layers of iron core pieces, wherein each layer of iron core pieces comprises a plurality of components, and the components are mutually spliced to form a set shape of the layer;
the clamping piece is used for fixing the iron core chips stacked into a plurality of layers;
among the plurality of the hierarchical iron core slices along the stacking direction, the splicing positions of the plurality of the components are staggered.
Further, the parts are gradually staggered in the stacking direction at the splice positions, so that projections of the splice positions in the stacking direction are not overlapped.
Further, the parts are spliced and staggered along the stacking direction, so that projections of the spliced parts of two adjacent layers in the stacking direction are not overlapped.
Further, the parts are spliced and symmetrical along the stacking direction, and the spliced parts on any side of the symmetry center are gradually staggered progressively, so that the projections of the spliced parts on any side of the symmetry center in the stacking direction are not overlapped.
Further, the direction of mutual dislocation of the spliced parts of the components is parallel to the length extending direction of the spliced seam.
Further, the dislocation distance of the splicing parts of two adjacent layers is larger than the width of the splicing parts.
Further, the projection areas of the core pieces of the several layers in the stacking direction gradually decrease from the middle to the two sides.
Further, the clamping pieces are arranged at two ends of the core chip in the vertical direction of the plurality of layers.
The beneficial effects of the invention are as follows: according to the invention, the iron core structure is formed by arranging the iron core pieces and the clamping pieces which are stacked into a plurality of layers, each layer of iron core piece comprises a plurality of parts which are mutually spliced, the parts are mutually spliced to form the set shape of the layer, when the iron core structure is stacked, the mutually spliced parts in the iron core pieces of different layers are mutually staggered at the splicing position, so that the iron core is in cross section, the splicing seams are mutually staggered, an electromagnetic field can be blocked by the iron core piece at the next layer after passing through the splicing seams of the layer, a good magnetism isolating effect is achieved, magnetic leakage is reduced, stray loss is reduced, and the performance of the transformer is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
Fig. 1 is a side view of a core structure;
FIG. 2 is a schematic view of the structure of the stacked iron core pieces;
FIG. 3 is a schematic diagram of the dislocation mode in example 1;
FIG. 4 is a schematic diagram of the dislocation mode in example 2;
fig. 5 is a schematic diagram of the dislocation system in example 3.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be noted that the directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, or may be internal communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
as shown in fig. 1 to 3: the embodiment scheme comprises an iron core structure for reducing stray loss of an oil immersed transformer, and the iron core structure comprises:
the iron core pieces 1 are stacked into a plurality of layers, each layer of iron core pieces 1 comprises a plurality of components 11, and the components 11 are spliced with each other to form a set shape of the layer;
the clamping piece 2 is used for fixing the iron core pieces 1 stacked into a plurality of layers;
wherein, in the core segments 1 of several levels along the stacking direction, the joints of several components 11 are mutually dislocated.
In this embodiment, through setting up iron core piece 1 and the folder 2 of piling up into a plurality of levels, every layer of iron core piece 1 includes a plurality of parts 11 of mutual concatenation, constitute the settlement shape of this layer after a plurality of parts 11 splice each other, when piling up, the part 11 of mutual concatenation in the iron core piece 1 of different levels misplaces each other in the concatenation department, thereby the iron core is on the cross section, splice seam misplaced each other, the electromagnetic field can be blocked by iron core piece 1 at the next floor after passing the splice seam of this layer, play fine magnetism effect that separates, reduce the magnetic leakage, thereby reduce stray loss, promote the performance of transformer.
As shown in fig. 3, in the present embodiment, the splice of the plurality of members 11 is gradually shifted in the stacking direction so that projections of the splice in the stacking direction do not overlap.
By not overlapping the projections of the splice in the stacking direction, i.e. after the electromagnetic field passes through the splice joint there, the subsequent thickness direction is blocked by the iron chip 1, so that the magnetic leakage phenomenon is minimal, but in this way the operation is also troublesome when stacking the iron chip 1.
The direction of mutual dislocation of the spliced parts of the parts 11 is parallel to the length extending direction of the spliced joint, so that magnetic leakage can be effectively reduced, and the performance of the transformer is improved.
Preferably, in the above embodiment, the distance of the dislocation of the splice of two adjacent layers of the components 11 is greater than the width of the splice of the components 11. So that the electromagnetic field passing through the splice can be blocked by the core sheet 1 at the next layer, improving the transformer performance.
In the present embodiment, the projected areas of the core pieces 1 of several stages in the stacking direction gradually decrease from the middle to both sides.
The clamping pieces 2 are arranged at two ends of the core pieces 1 in the vertical direction of the layers.
Example 2:
as shown in fig. 4, unlike in embodiment 1, in the present embodiment, the splice of the several members 11 is staggered in the stacking direction so that the projections of the splice of the adjacent two layers in the stacking direction do not overlap.
By staggering the splice when stacking, i.e. after the electromagnetic field passes the splice at this point, it will be blocked by the next layer of core sheet 1, but due to the staggered arrangement, i.e. it will be blocked by half the thickness of the core sheet 1, the effect of reducing magnetic leakage is not as good as in embodiment 1, but this way is more convenient to operate when stacking the core sheets 1.
The direction of mutual dislocation of the spliced parts of the parts 11 is parallel to the length extending direction of the spliced joint, so that magnetic leakage can be effectively reduced, and the performance of the transformer is improved.
Preferably, in the above embodiment, the distance of the dislocation of the splice of two adjacent layers of the components 11 is greater than the width of the splice of the components 11. So that the electromagnetic field passing through the splice can be blocked by the core sheet 1 at the next layer, improving the transformer performance.
In this embodiment, through setting up iron core piece 1 and the folder 2 of piling up into a plurality of levels, every layer of iron core piece 1 includes a plurality of parts 11 of mutual concatenation, constitute the settlement shape of this layer after a plurality of parts 11 splice each other, when piling up, the part 11 of mutual concatenation in the iron core piece 1 of different levels misplaces each other in the concatenation department, thereby the iron core is on the cross section, splice seam misplaced each other, the electromagnetic field can be blocked by iron core piece 1 at the next floor after passing the splice seam of this layer, play fine magnetism effect that separates, reduce the magnetic leakage, thereby reduce stray loss, promote the performance of transformer.
Example 3:
as shown in fig. 5, unlike the solutions in embodiment 1 and embodiment 2, in the present embodiment, the splice points of the several components 11 are centrosymmetrically aligned along the stacking direction, and the splice points on either side of the symmetry center are progressively shifted so that the projections of the splice points on either side of the symmetry center in the stacking direction do not overlap.
By gradually dislocating the splice at any side of the center of symmetry, the magnetic flux leakage reduction effect and the stacking operation difficulty of the method are both between those of the embodiment 1 and the embodiment 2.
The direction of mutual dislocation of the spliced parts of the parts 11 is parallel to the length extending direction of the spliced joint, so that magnetic leakage can be effectively reduced, and the performance of the transformer is improved.
Preferably, in the above embodiment, the distance of the dislocation of the splice of two adjacent layers of the components 11 is greater than the width of the splice of the components 11. So that the electromagnetic field passing through the splice can be blocked by the core sheet 1 at the next layer, improving the transformer performance.
In this embodiment, through setting up iron core piece 1 and the folder 2 of piling up into a plurality of levels, every layer of iron core piece 1 includes a plurality of parts 11 of mutual concatenation, constitute the settlement shape of this layer after a plurality of parts 11 splice each other, when piling up, the part 11 of mutual concatenation in the iron core piece 1 of different levels misplaces each other in the concatenation department, thereby the iron core is on the cross section, splice seam misplaced each other, the electromagnetic field can be blocked by iron core piece 1 at the next floor after passing the splice seam of this layer, play fine magnetism effect that separates, reduce the magnetic leakage, thereby reduce stray loss, promote the performance of transformer.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An oil immersed transformer reduces spurious losses's iron core structure, characterized in that includes:
stacking a plurality of layers of iron core pieces, wherein each layer of iron core pieces comprises a plurality of components, and the components are mutually spliced to form a set shape of the layer;
the clamping piece is used for fixing the iron core chips stacked into a plurality of layers;
among the plurality of the hierarchical iron core slices along the stacking direction, the splicing positions of the plurality of the components are staggered.
2. The iron core structure for reducing stray losses of an oil immersed transformer according to claim 1, wherein the splice parts of the plurality of parts are gradually staggered in the stacking direction so that projections of the splice parts in the stacking direction are not overlapped.
3. The iron core structure for reducing stray loss of an oil immersed transformer according to claim 1, wherein the splice parts of the plurality of parts are staggered along the stacking direction, so that projections of the splice parts of two adjacent layers in the stacking direction are not overlapped.
4. The iron core structure for reducing stray loss of an oil immersed transformer according to claim 1, wherein the spliced parts of the parts are centrally symmetrical along the stacking direction, and the spliced parts on either side of the symmetrical center are gradually staggered progressively so that the projections of the spliced parts on either side of the symmetrical center in the stacking direction are not overlapped.
5. An oil immersed transformer core structure for reducing stray losses according to any one of claims 2 to 4, wherein the direction of mutual misalignment of the component joints is parallel to the direction of extension of the length of the joint.
6. An oil immersed transformer core structure according to any one of claims 2 to 4, wherein the distance by which the splice of two adjacent layers of components is offset is greater than the width of the splice of components.
7. The core structure for reducing stray losses of an oil immersed transformer according to claim 1, wherein projected areas of the core sheets of several levels in a stacking direction are gradually reduced from the middle to both sides.
8. The iron core structure for reducing stray loss of an oil immersed transformer according to claim 1, wherein the clamping members are arranged at two ends of the iron core sheet in the vertical direction of the plurality of layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307864.7A CN116344169A (en) | 2023-03-27 | 2023-03-27 | Iron core structure for reducing stray loss of oil immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307864.7A CN116344169A (en) | 2023-03-27 | 2023-03-27 | Iron core structure for reducing stray loss of oil immersed transformer |
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| Publication Number | Publication Date |
|---|---|
| CN116344169A true CN116344169A (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310307864.7A Pending CN116344169A (en) | 2023-03-27 | 2023-03-27 | Iron core structure for reducing stray loss of oil immersed transformer |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884453Y (en) * | 2006-04-21 | 2007-03-28 | 苏州杭申星州变压器有限公司 | Non-crystalline alloy single-phase transformer |
| CN102110521A (en) * | 2009-12-25 | 2011-06-29 | 上海宝钢设备检修有限公司 | Bias seam method for laminated iron core of transformer |
| US20120146760A1 (en) * | 2009-11-20 | 2012-06-14 | Mitsubishi Electric Corporation | Transformer |
| TW201225117A (en) * | 2010-12-09 | 2012-06-16 | Shigenori Okada | Frame shaped core and method for assembling the same |
| CN109192466A (en) * | 2018-11-08 | 2019-01-11 | 山东电工电气集团智能电气有限公司 | transformer core and transformer |
| CN110299245A (en) * | 2019-05-05 | 2019-10-01 | 宁波易荣达智能科技有限公司 | A kind of transformer core stepping laminating method |
| CN113593846A (en) * | 2021-06-07 | 2021-11-02 | 广州市一变电气设备有限公司 | Low-loss dry-type transformer |
| CN115763041A (en) * | 2022-11-29 | 2023-03-07 | 吴江变压器有限公司 | Iron core lamination method |
-
2023
- 2023-03-27 CN CN202310307864.7A patent/CN116344169A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884453Y (en) * | 2006-04-21 | 2007-03-28 | 苏州杭申星州变压器有限公司 | Non-crystalline alloy single-phase transformer |
| US20120146760A1 (en) * | 2009-11-20 | 2012-06-14 | Mitsubishi Electric Corporation | Transformer |
| CN102110521A (en) * | 2009-12-25 | 2011-06-29 | 上海宝钢设备检修有限公司 | Bias seam method for laminated iron core of transformer |
| TW201225117A (en) * | 2010-12-09 | 2012-06-16 | Shigenori Okada | Frame shaped core and method for assembling the same |
| CN109192466A (en) * | 2018-11-08 | 2019-01-11 | 山东电工电气集团智能电气有限公司 | transformer core and transformer |
| CN110299245A (en) * | 2019-05-05 | 2019-10-01 | 宁波易荣达智能科技有限公司 | A kind of transformer core stepping laminating method |
| CN113593846A (en) * | 2021-06-07 | 2021-11-02 | 广州市一变电气设备有限公司 | Low-loss dry-type transformer |
| CN115763041A (en) * | 2022-11-29 | 2023-03-07 | 吴江变压器有限公司 | Iron core lamination method |
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