KR20160081493A - A core for transformer - Google Patents
A core for transformer Download PDFInfo
- Publication number
- KR20160081493A KR20160081493A KR1020140195419A KR20140195419A KR20160081493A KR 20160081493 A KR20160081493 A KR 20160081493A KR 1020140195419 A KR1020140195419 A KR 1020140195419A KR 20140195419 A KR20140195419 A KR 20140195419A KR 20160081493 A KR20160081493 A KR 20160081493A
- Authority
- KR
- South Korea
- Prior art keywords
- yoke
- steel plates
- transformer
- upper yoke
- iron core
- Prior art date
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Classifications
-
- 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
-
- 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
- H01F27/2455—Magnetic cores made from sheets, e.g. grain-oriented using bent laminations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The present invention relates to an iron core of a transformer, which is arranged horizontally with an upper yoke and an upper yoke, which are composed of a plurality of electrical steel plates laminated so that their longitudinal side faces are located on the same plane, A lower yoke formed of a plurality of electric steel plates laminated so as to be positioned on a plane, and a plurality of legs wound around the coil and vertically disposed between the upper yoke and the lower yoke, So that the coil wound on the legs is effectively supported and the manufacturing cost is reduced by reducing the overall weight and iron loss.
Description
The present invention relates to an iron core of a transformer, and more particularly, to an iron core of a transformer that reduces iron amount and iron loss through a change in the lamination structure of the electric steel sheet.
The transformer is a transformer that changes the magnitude of AC voltage and current by using electromagnetic induction phenomenon. The transformer generally comprises an upper yoke, a lower yoke, a plurality of legs, a coil wound on the legs, and a current generator providing a high frequency current to the coil.
In this case, the core of the transformer, that is, the iron core is constituted by coupling the upper yoke, the lower yoke, and the plurality of legs. The upper yoke, the lower yoke, and the plurality of legs are each formed of a laminate in which an electrical steel sheet is laminated.
Japanese Patent Laid-Open Publication No. 2005-056942 (Patent Document 1) and Korean Patent Laid-Open Publication No. 2013-0076930 (Patent Document 2), which is an election result of the present applicant, have been disclosed as prior art related to the core of a transformer.
1 is a perspective view showing an iron core of a conventional transformer.
Referring to FIG. 1, a conventional iron core of a transformer includes an
The
The
The
Specifically, the
In this case, since the iron core of the conventional transformer is circular in cross section (hereinafter referred to as lamination cross section) except for the
In addition, the weight of the iron core is unnecessarily increased because the
In addition, there has been a problem that the increase in the weight of the iron core accompanies the increase in the iron loss at the same time.
Further, the increase in the weight and iron loss of the iron core raises the manufacturing cost.
SUMMARY OF THE INVENTION In order to solve the above-described problems, it is an object of the present invention to provide an iron core for a transformer in which electrical steel plates are laminated so that the lamination cross section of the upper yoke and the lower yoke is laminated so as to effectively support coils wound on the legs.
In addition, the present invention provides an iron core for a transformer in which the legs are manufactured in accordance with the semi-elliptical laminated section of the upper yoke and the lower yoke, thereby reducing the overall weight.
In addition, the present invention provides an iron core for a transformer that reduces iron loss through overall weight reduction.
It is another object of the present invention to provide an iron core for a transformer that reduces the manufacturing cost by reducing the weight and iron loss of the iron core.
Further, it is an object of the present invention to provide an iron core for a transformer in which a predetermined escaping groove is formed at one side to provide insulation, lead out of a coil, or ease of manufacture of a wrought iron.
The iron core of the transformer according to the embodiment of the present invention is horizontally arranged with an upper yoke and an upper yoke which are made of a plurality of electric steel plates laminated such that their longitudinal side faces are located on the same plane, A lower yoke comprising a plurality of electrical steel sheets laminated so as to be positioned on the same plane, and a plurality of legs, each coil being wound and coupled to both ends of the upper yoke and the lower yoke, .
In this case, the electrical steel sheets of the upper yoke may have a semi-elliptical cross-section of the lamination.
At this time, it is preferable that the electrical steel plates of the upper yoke have individual widths in which the lamination section becomes circular when each of the steel plates is rearranged so that their center lines are aligned.
On the other hand, the electric steel sheets of the lower yoke may have a semi-elliptical shape in cross section.
At this time, it is preferable that the electrical steel plates of the lower yoke have individual widths in which the lamination section becomes circular when the center lines of the steel plates are rearranged so as to coincide with each other.
The upper yoke may be further stacked with at least one auxiliary electrical steel sheet, which is located in a position different from the plane in which the longitudinal side faces of the electrical steel plates of the upper yoke are located, to form a predetermined escape groove.
The lower yoke may be further laminated with at least one auxiliary electrical steel sheet which is located in a position shifted from the plane in which the longitudinal side faces of the electrical steel plates of the lower yoke are positioned to form a predetermined escape groove.
As described above, the transformer iron core according to the present invention can effectively support the coils wound on the legs by stacking the electrical steel plates so that the cross section of the upper yoke and the lower yoke becomes semi-elliptical.
In addition, the iron core for a transformer according to the present invention is manufactured in accordance with the half-elliptical laminated section of the upper yoke and the lower yoke, and the overall weight is reduced.
In addition, the iron core for a transformer according to the present invention reduces iron loss through overall weight reduction.
Further, the iron core for a transformer according to the present invention reduces the manufacturing cost by reducing the weight and iron loss of the iron core.
Furthermore, the iron core for a transformer according to the present invention has a predetermined escape groove formed on one side thereof to facilitate the insulation, the lead portion of the coil, or the manufacture of the wrought iron.
1 is a perspective view showing an iron core of a conventional transformer.
FIG. 2 is a perspective view showing one of the electric steel plates constituting the upper yoke and the lower yoke of the iron core of the transformer according to the embodiment of the present invention.
3 is a perspective view illustrating an iron core of a transformer according to an embodiment of the present invention.
4 is a partial perspective view showing a state where the coil is wound on the transformer shown in Fig.
FIG. 5 is a graphical representation of the arrangement of electrical steel plates in an iron core of the transformer shown in FIG. 2; FIG.
6 is a partial perspective view of an iron core of a transformer according to another embodiment of the present invention.
The accompanying drawings in the present invention may be exaggerated for clarity, clarity, and descriptive convenience. In addition, since the following terms are defined in consideration of the functions of the present invention, they may vary depending on the intention or custom of the user, the operator, and the definitions of these terms should be based on the technical contents throughout this specification will be. On the contrary, the embodiments are merely illustrative of the constituent elements set forth in the claims of the present invention and do not limit the scope of the present invention, and the scope of the rights should be interpreted on the basis of technical ideas throughout the specification of the present invention .
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an iron core of a transformer, and more particularly, 4 is a partial perspective view showing a state where the coil is wound on the transformer shown in FIG. 2, and FIG. 5 is a diagram virtually changing the arrangement of electrical steel sheets in the iron core of the transformer shown in FIG.
2 to 5, an iron core of a transformer according to an embodiment of the present invention includes an
First, referring to FIG. 2, an electric steel plate constituting the
The height H and the width W of the individual electric steel sheets 1 (the auxiliary
In this case, when the electric steel plate 1 is coupled with the electric steel plate of the
On the other hand, the shape of the electric steel plate 1 may be variously formed because the number and shape of the leg
The
In this case, as shown in Fig. 3, it is preferable that the plurality of electrical steel sheets are laminated so that their one longitudinal side faces are coplanar.
As a result, the contact area with the coil wound on the
The
The electric steel plates of the
The
The
It is preferable that the plurality of electric steel plates constituting the
As a result, the iron core of the transformer according to the embodiment of the present invention is flattened in contact area with the coil wound on the
4, when the winding
The
As a result, as in the case where the lower yoke of the conventional transformer has a circular lamination section, the outer side of the
The electric steel plates of the
5, a plurality of electric steel plates constituting each of the
Therefore, the iron core of the transformer according to the embodiment of the present invention can reduce the production cost due to the overall weight of the iron core of the conventional transformer and the resulting iron loss reduction. Experimental results show that when the iron core of the present invention is compared with the conventional iron core by Naional Grid 275MV 240MVA, the iron amount is reduced from 44,483kg to 43,593kg (when the 3300 won per kg is applied, the manufacturing cost is reduced by 300,000 won) And 37.3 kW (US $ 6200 per kW, and KRW 1100 won, respectively).
The
In this case, the
The
Referring to FIG. 6, the iron core of the transformer according to another embodiment of the present invention may include the laminated structure of the electric steel sheet of the
As shown in FIG. 6, the
That is, the auxiliary
In order to explain the features of the present invention separately, the electric steel plate of the
As described above, the transformer iron core according to the present invention effectively supports the coils wound on the legs, reduces the manufacturing cost by reducing the overall weight and the iron loss, further enhances insulation, leads the coils, .
As described above, the present invention has been described with reference to the embodiments shown in the drawings. However, it should be understood that the present invention is by way of example only and that various modifications and equivalent embodiments are possible on the basis of common knowledge in the art . Therefore, the true technical protection scope of the present invention should be determined based on the specific contents of the above-mentioned invention in accordance with the claims to be described below.
The present invention relates to an iron core of a transformer and is applicable to an industrial field related to a transformer.
1:
1b:
100: upper yoke 110: leg coupling portion
200: lower yoke 210: leg coupling portion
220: escape home
300: legs 310: outer legs
320:
400:
Claims (7)
A lower yoke consisting of a plurality of electrical steel plates arranged horizontally to the upper yoke and stacked such that their longitudinal side faces are coplanar; And
A plurality of legs wound around the coils and coupled at both ends to the upper yoke and the lower yoke so as to be vertically disposed between the upper yoke and the lower yoke;
And an iron core of the transformer.
And the laminated section is semi-elliptical.
And each of the steel plates has an individual width in which the lamination section becomes circular when the center lines of the steel plates are rearranged to coincide with each other.
And the laminated section is semi-elliptical.
And each of the steel plates has an individual width in which the lamination section becomes circular when the center lines of the steel plates are rearranged to coincide with each other.
Wherein at least one auxiliary electrical steel sheet is formed by further laminating at least one auxiliary electrical steel sheet whose longitudinal side face is located at a position shifted from a plane where longitudinal side faces of the electrical steel plates of the upper yoke are located to form predetermined escape grooves.
Wherein at least one auxiliary electrical steel sheet is further laminated, the longitudinal side surface of which is located in a position shifted from a plane where the longitudinal side faces of the electrical steel plates of the lower yoke are located, thereby forming a predetermined escape groove.
Priority Applications (1)
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KR1020140195419A KR20160081493A (en) | 2014-12-31 | 2014-12-31 | A core for transformer |
Applications Claiming Priority (1)
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KR1020140195419A KR20160081493A (en) | 2014-12-31 | 2014-12-31 | A core for transformer |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107369534A (en) * | 2017-07-14 | 2017-11-21 | 合肥天威众元电气有限公司 | A kind of three-phase solid laminated core transformer |
KR101855039B1 (en) * | 2017-04-11 | 2018-06-14 | 엘에스산전 주식회사 | Device for reducing noise of core structure for transformer |
WO2018117483A1 (en) * | 2016-12-20 | 2018-06-28 | 주식회사 효성 | Transformer iron core |
KR102368210B1 (en) | 2021-12-17 | 2022-03-02 | 주식회사 케이피일렉트릭 | Core for transformer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005056942A (en) | 2003-08-08 | 2005-03-03 | Nippon Steel Corp | Transformer |
KR20130076930A (en) | 2011-12-29 | 2013-07-09 | 주식회사 효성 | Core for transformer |
-
2014
- 2014-12-31 KR KR1020140195419A patent/KR20160081493A/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005056942A (en) | 2003-08-08 | 2005-03-03 | Nippon Steel Corp | Transformer |
KR20130076930A (en) | 2011-12-29 | 2013-07-09 | 주식회사 효성 | Core for transformer |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018117483A1 (en) * | 2016-12-20 | 2018-06-28 | 주식회사 효성 | Transformer iron core |
US11488759B2 (en) | 2016-12-20 | 2022-11-01 | Hyosung Heavy Industries Corporation | Transformer iron core |
KR101855039B1 (en) * | 2017-04-11 | 2018-06-14 | 엘에스산전 주식회사 | Device for reducing noise of core structure for transformer |
CN107369534A (en) * | 2017-07-14 | 2017-11-21 | 合肥天威众元电气有限公司 | A kind of three-phase solid laminated core transformer |
CN107369534B (en) * | 2017-07-14 | 2024-04-12 | 合肥天威众元电气有限公司 | Three-phase three-dimensional iron core transformer that stacks |
KR102368210B1 (en) | 2021-12-17 | 2022-03-02 | 주식회사 케이피일렉트릭 | Core for transformer |
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