WO2017116211A1 - 변압기나 리액터용 철심 - Google Patents
변압기나 리액터용 철심 Download PDFInfo
- Publication number
- WO2017116211A1 WO2017116211A1 PCT/KR2016/015576 KR2016015576W WO2017116211A1 WO 2017116211 A1 WO2017116211 A1 WO 2017116211A1 KR 2016015576 W KR2016015576 W KR 2016015576W WO 2017116211 A1 WO2017116211 A1 WO 2017116211A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leg
- legs
- yoke
- steel sheet
- iron core
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 95
- 239000010959 steel Substances 0.000 claims abstract description 95
- 230000004907 flux Effects 0.000 claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 238000004804 winding Methods 0.000 claims description 45
- 238000010030 laminating Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
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
- H01F27/26—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
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/02—Cores, Yokes, or armatures made from sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
Definitions
- the present invention relates to iron cores for transformers or reactors, and more particularly, to iron cores for transformers or reactors which are formed by stacking a plurality of steel sheets and form a magnetic path for magnetic flux generated by current applied to a winding.
- magnetic flux is generated when a current flows in a primary winding wound around a leg of an iron core, whereby the secondary winding is induced with an electromotive force in a direction to prevent the change of the magnetic flux.
- a high permeability silicon steel sheet having a specific permeability of several tens to tens of thousands is laminated to produce an iron core having a predetermined shape.
- direct current magnetic flux occurs in the iron core.
- the direct current magnetic flux does not generate organic electromotive force through electromagnetic induction in the opposite winding, there is no magnetic flux that cancels the generated direct current magnetic flux from the iron core so that the iron core is saturated.
- the core is saturated since there is no counter winding to cancel the alternating magnetic flux caused by the alternating current of the winding.
- a converter transformer or a reactor into which a direct current flows is used to design a low velocity density or to form a void in the iron core to prevent saturation of the iron core.
- the size of the iron core is increased, which causes a problem of increasing the size of the transformer or reactor.
- An object of the present invention is to solve the conventional problems as described above, and to provide an iron core for a transformer or a reactor in which magnetic saturation does not occur even when a DC current is mixed.
- Another object of the present invention is to provide a relatively miniaturized iron core for a transformer or reactor without magnetic saturation.
- the present invention is at least two legs made of at least one of the width direction rolled steel sheet or the non-oriented steel sheet is laminated, the winding is wound and arranged side by side, and And a first yoke connecting one end of the legs to allow the magnetic flux to pass between the legs, and a second yoke connecting the other ends of the legs to the magnetic flux between the legs.
- the leg includes a first leg in which a first winding is wound and a second leg disposed in parallel with the first leg and in which a second winding is wound.
- the leg includes a first leg in which a first winding is wound, a second leg disposed in parallel with the first leg and a second winding, and a third leg disposed in parallel with the second leg and winding in a third winding. It includes.
- the length of the legs has a predetermined value and the length of the yoke corresponding to the legs is shorter than the length of the legs.
- At least one of an unoriented steel plate, a width direction steel plate, or a longitudinal direction steel plate is used for the said 1st yoke and the 2nd yoke.
- the present invention is at least two legs are made by stacking the steel sheet is wound and the winding is arranged side by side, the first yoke for connecting the ends of the legs to pass the magnetic flux between the legs, and And a second yoke for connecting the other ends of the legs to allow magnetic flux to pass between the legs, wherein at least one of the legs, the first yoke, and the second yoke must use at least one of a widthwise rolled steel sheet and a non-directional steel sheet, and the rest of the legs. Any one or more of widthwise rolled steel sheet, non-directional steel sheet, longitudinal rolled steel sheet is used.
- the length of the legs has a predetermined value and the length of the yoke corresponding to the legs is shorter than the length of the legs.
- the roll or the yoke wound around the winding uses a widthwise rolled steel sheet or a non-directional steel sheet to increase the magnetic resistance. It works.
- the length of the yoke is made shorter than the length of the legs of the iron core.
- the length of the yoke within the range that can secure the insulation distance between the windings wound on the leg, it is possible to miniaturize the transformer configuration as a whole.
- FIG. 1 is a partial perspective view showing the configuration of a preferred embodiment of the iron core for a transformer or a reactor according to the present invention.
- Figure 2 is a plan view showing that the winding is wound around the iron core of the embodiment shown in FIG.
- 3 is a B-H curve showing the characteristics of the steel sheet used in the iron core.
- Figure 4 is a partial perspective view showing the configuration of another embodiment of the present invention.
- FIG. 5 is a plan view showing that the winding is wound around the iron core of the embodiment shown in FIG.
- Figure 6 is a partial perspective view showing the configuration of another embodiment of the present invention.
- the present invention aims to prevent magnetic saturation from occurring in a reactor using alternating current or a transformer in which a direct current is mixed. For this purpose, a magnetic resistance is relatively increased to design a transformer or a reactor core.
- the magnitude of the magnetoresistance R may be varied according to the specific permeability ⁇ r .
- the specific permeability ( ⁇ r ) is determined according to the B / H value. Referring to the graph shown in FIG. 3, the relative permeability of the non-oriented steel plate or the widthwise steel plate ( ⁇ r ) is longer than that of the longitudinal steel plate. You can see that it is small. Comparing the non-oriented steel sheet with the width-wise steel sheet, it can be seen that the width steel sheet is smaller. Therefore, the use of the widthwise steel plate or the non-oriented steel plate rather than the longitudinal steel plate can increase the magnetoresistance R, thereby preventing the magnetic saturation of the iron core for the transformer or the reactor into which the DC current is mixed.
- the iron core of the present exemplary embodiment includes a first leg 10, a second leg 12, and a third leg 14 arranged side by side, and the first leg 10, the second leg 12, and the third leg ( There is a first yoke 16 to connect one ends of the 14 and a second yoke 18 to connect the other ends of the first leg 10, the second leg 12 and the third leg 14. There is.
- These legs 10, 12, 14 and yokes 16, 18 are all made of a plurality of steel sheets are stacked.
- a first winding 10 ′ including a primary side and a secondary side is wound around the first leg 10
- a second winding 12 including a primary side and a secondary side is wound around the second leg 12.
- ') Is wound around the third leg 14, and the third winding 14' including the primary side and the secondary side is wound.
- the iron core is made by stacking a plurality of steel sheets, for example, silicon steel sheets.
- the first leg 10, the second leg 12 and the third leg 14 are all made by stacking the widthwise rolled steel sheet (11).
- the width direction rolling steel plate 11 means that the rolling direction of the steel plate became the width direction of these 1st leg 10, the 2nd leg 12, and the 3rd leg 14. As shown in FIG. That is, although the steel plate is made by rolling, it is the width direction rolling steel plate 11 which became the width direction as shown by the arrow a in FIG. 1 or FIG.
- first yoke 16 and the second yoke 18 uses a longitudinally rolled steel plate 17, which is rolled in the longitudinal direction as indicated by an arrow b in FIG. 1 or FIG. 2.
- the first yoke 16 and the second yoke 18 allow the magnetic flux to pass through between the legs 10, 12, 14.
- both the leg and the yoke are made using longitudinally rolled steel sheet.
- the characteristic curve associated with the widthwise rolled steel sheet 11 is a curve connecting triangles
- the characteristic curve associated with the longitudinal rolled steel sheet 17 is a curve connecting circles
- the characteristic curve associated with the non-oriented steel sheet 19 is a square. Is a curve connecting.
- the steel sheet of the transformer in the region where the slope becomes low while the slope becomes low, that is, the A saturation region indicated by the dotted circle in FIG. 3.
- the steel sheet of the transformer in the region where the slope is very large before.
- the inclination of the magnetic field strength H is large in a region larger than that of the longitudinally rolled steel sheet 17. That is, in the case of the widthwise rolled steel sheet 11, the strength of the magnetic field is in the range of 200 to 300 [A / m], and in the case of the non-oriented steel sheet 19, the strength of the magnetic field is in the range of 100 to 200 [A / m]. In contrast, in the case of the longitudinally rolled steel sheet 17, it is 10 to 30 [A / m].
- the widthwise rolled steel sheet 11 and the non-oriented steel sheet 19 rather than using the longitudinally rolled steel sheet 17, it is possible to increase the magnetic resistance of the iron core. Therefore, even if the direct current is mixed to increase the intensity value of the magnetic field, the widthwise rolled steel sheet 11 and the non-oriented steel sheet 19 can be sufficiently accommodated.
- the iron core includes a first leg 110, a second leg 112, and a third leg 114 arranged side by side, and the first leg 110, the second leg 112, and the third leg ( There is a first yoke 116 to connect one end of the 114, and a second yoke 118 to connect the other ends of the first leg 110, the second leg 112, and the third leg 114. There is.
- These legs 110, 112, 114 and yokes 116, 118 are all made of a plurality of steel sheets are stacked.
- the non-oriented steel sheet 19 is used in the first leg 110, the second leg 112 and the third leg 114.
- the first yoke 116 and the second yoke 118 use a longitudinally rolled steel sheet 17 as in the above embodiment.
- first winding 110 ′ including the primary side and the secondary side is wound around the first leg 110
- second winding 112 including the primary side and the secondary side is wound around the second leg 112.
- Is wound around the third leg 114 is wound around the third winding 114' including the primary side and the secondary side.
- the non-oriented steel sheet 19 is used, which means a steel sheet without a rolling direction. Accordingly, the non-oriented steel sheet 19 is not arrowed in the drawings of this embodiment.
- the non-oriented steel sheet 19 is used in the first, second and third legs (110, 112, 114).
- the non-oriented steel sheet 19 has a characteristic corresponding to about halfway between the longitudinally rolled steel sheet 17 and the widthwise rolled steel sheet 11 in view of the magnetic field strength. Therefore, the magnetoresistance may be relatively lower than that of the embodiment illustrated in FIG. 1.
- the iron core is made of three legs 10, 12, 14 (110, 112, 114) and two yokes 16, 18 (116, 118), but in FIG. 6, the iron core has two legs 210, 212. And two yokes 216 and 218, the length of legs 210 and 212 being longer than the lengths of the yokes 216 and 218.
- This length relationship is the same in the above two embodiments.
- the lengths of the yokes 16, 18, 116, 118 in the above embodiments are, for example, between the first leg 10 and the second leg 12 and the second leg 12 and the third leg 14. The value between).
- the first leg 210 and the second leg 212 of the two legs 210 and 212 each use a longitudinally rolled steel sheet 211.
- the first yoke 216 and the second yoke 218 each use a non-oriented steel sheet 217.
- the magnets 210 and 212 and the yokes 216 and 218 can each have a larger magnetoresistance compared to using a longitudinally rolled steel sheet, so that even if DC current is continuously mixed, the magnetic saturation does not occur and the function of the transformer can be achieved. This can be done.
- This embodiment does not describe the winding of the windings (not shown) on the legs 210 and 212.
- the first winding 10 ' is attached to the first leg 10, the second winding 12' is attached to the second leg 12, and the third winding is attached to the third leg 14. 14 ') is wound.
- the first yoke 16 and the second yoke 18 allow the magnetic flux to pass through between the legs 10, 12, 14.
- the first yoke 16 and the second yoke 18 used a longitudinally rolled steel sheet 17, but the first leg 10 and the second leg 12 used a widthwise rolled steel sheet 11. Therefore, when the magnetoresistance is obtained as a whole, the magnetoresistance becomes relatively large so that no magnetic saturation occurs even if a DC current is mixed.
- the legs (110.112, 114) are made of an unoriented steel plate 19
- the yoke (116, 118) is a longitudinally rolled steel sheet (17). Therefore, the total magnetoresistance value becomes relatively large compared to using only the longitudinally rolled steel sheet 17, so that no magnetic saturation occurs even if a DC current is mixed.
- legs 10, 12, and 14 and two legs 210 and 212 are shown, but the entire plane becomes square while having multiple legs such as five legs. There may be iron cores.
- One of the illustrated embodiments is made of the legs 10, 12, 14 made of the widthwise rolled steel sheet 11, the other is made of a non-oriented steel sheet 19, they may be mixed with each other.
- the first leg 10 is made of a widthwise rolled steel sheet 11
- the second leg 10 is made of an unoriented steel sheet 19
- the third leg 10 is made of a widthwise rolled steel sheet ( 11) can be made in various combinations. That is, the legs and yokes must be at least one of the widthwise rolled steel sheet and the non-directional steel sheet, and the rest of the legs and yokes can be formed using one or more of the widthwise rolled steel sheet, the non-directional steel sheet, and the longitudinally rolled steel sheet. To manufacture.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
Claims (7)
- 폭방향 압연강판 또는 무방향 강판중 적어도 어느 하나가 적층되어 만들어지고 권선이 감아지며 나란히 배치되는 적어도 2개의 레그와,상기 레그들의 일단부를 연결하여 레그 사이에서 자속을 통과시키는 제1 요크와,상기 레그들의 타단부를 연결하여 레그 사이에서 자속을 통과시키는 제2 요크를 포함하는 변압기나 리액터용 철심.
- 제 1 항에 있어서, 상기 레그는 제1권선이 감아지는 제1 레그와 상기 제1 레그와 나란히 배치되고 제2권선이 감아지는 제2 레그를 포함하는 변압기나 리액터용 철심.
- 제 1 항에 있어서, 상기 레그는 제1권선이 감아지는 제1 레그와, 상기 제1 레그와 나란히 배치되고 제2권선이 감아지는 제2 레그와, 상기 제2 레그와 나란히 배치되고 제3권선이 감아지는 제3 레그를 포함하는 변압기나 리액터용 철심.
- 제 1 항에 있어서, 상기 레그들의 길이는 소정의 값을 가지고 상기 레그들 사이에 해당되는 상기 요크의 길이는 상기 레그의 길이보다 짧게 형성되는 변압기나 리액터용 철심.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 제1 요크와 제2 요크는 무방향 강판, 폭방향 강판 또는 길이방향 강판중 적어도 어느 하나가 사용되는 변압기나 리액터용 철심.
- 강판이 적층되어 만들어지고 권선이 감아지며 나란히 배치되는 적어도 2개의 레그와,상기 레그들의 일단부를 연결하여 레그 사이에서 자속을 통과시키는 제1요크와,상기 레그들의 타단부를 연결하여 레그 사이에서 자속을 통과시키는 제2 요크를 포함하고,상기 레그, 제1요크, 제2요크중 적어도 하나를 폭방향 압연강판과 무방향 강판중 하나를 반드시 사용하고 나머지를 폭방향 압연강판, 무방향 강판, 길이방향 압연강판 중 어느 하나 이상을 사용하는 변압기나 리액터용 철심.
- 제 6 항에 있어서, 상기 레그들의 길이는 소정의 값을 가지고 상기 레그들 사이에 해당되는 상기 요크의 길이는 상기 레그의 길이보다 짧게 형성되는 변압기나 리액터용 철심.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/067,526 US20190013138A1 (en) | 2015-12-30 | 2016-12-30 | Core for transformer or reactor |
KR1020187018533A KR20180082601A (ko) | 2015-12-30 | 2016-12-30 | 변압기나 리액터용 철심 |
EP16882163.5A EP3399530A4 (en) | 2015-12-30 | 2016-12-30 | CORE OF TRANSFORMER OR REACTOR |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20150190321 | 2015-12-30 | ||
KR10-2015-0190321 | 2015-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017116211A1 true WO2017116211A1 (ko) | 2017-07-06 |
Family
ID=59225293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2016/015576 WO2017116211A1 (ko) | 2015-12-30 | 2016-12-30 | 변압기나 리액터용 철심 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20190013138A1 (ko) |
EP (1) | EP3399530A4 (ko) |
KR (1) | KR20180082601A (ko) |
WO (1) | WO2017116211A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200279683Y1 (ko) * | 2002-03-08 | 2002-06-26 | 현대중공업 주식회사 | 전력용 변압기의 철심구조 |
KR20020054024A (ko) * | 2000-12-27 | 2002-07-06 | 주식회사 아이티씨 | 저손실 철심구조의 변압기 |
KR20040055905A (ko) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | 자성이 우수한 무방향성 전기강판 및 그 제조방법 |
JP2004332042A (ja) * | 2003-05-07 | 2004-11-25 | Nippon Steel Corp | 圧延方向とその板面内垂直方向磁気特性の優れた無方向性電磁鋼板の製造方法 |
JP2014086597A (ja) * | 2012-10-24 | 2014-05-12 | Jfe Steel Corp | 鉄損に優れた変圧器鉄心の製造方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63265409A (ja) * | 1987-04-23 | 1988-11-01 | Toshiba Corp | 相間リアクトル |
US6100783A (en) * | 1999-02-16 | 2000-08-08 | Square D Company | Energy efficient hybrid core |
US6562473B1 (en) * | 1999-12-03 | 2003-05-13 | Kawasaki Steel Corporation | Electrical steel sheet suitable for compact iron core and manufacturing method therefor |
JP4818577B2 (ja) * | 2003-08-08 | 2011-11-16 | 新日本製鐵株式会社 | 変圧器 |
JP5414420B2 (ja) * | 2009-08-21 | 2014-02-12 | ジェコー株式会社 | 電流センサ及びその製造方法 |
-
2016
- 2016-12-30 US US16/067,526 patent/US20190013138A1/en not_active Abandoned
- 2016-12-30 WO PCT/KR2016/015576 patent/WO2017116211A1/ko active Application Filing
- 2016-12-30 EP EP16882163.5A patent/EP3399530A4/en not_active Withdrawn
- 2016-12-30 KR KR1020187018533A patent/KR20180082601A/ko not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020054024A (ko) * | 2000-12-27 | 2002-07-06 | 주식회사 아이티씨 | 저손실 철심구조의 변압기 |
KR200279683Y1 (ko) * | 2002-03-08 | 2002-06-26 | 현대중공업 주식회사 | 전력용 변압기의 철심구조 |
KR20040055905A (ko) * | 2002-12-23 | 2004-06-30 | 주식회사 포스코 | 자성이 우수한 무방향성 전기강판 및 그 제조방법 |
JP2004332042A (ja) * | 2003-05-07 | 2004-11-25 | Nippon Steel Corp | 圧延方向とその板面内垂直方向磁気特性の優れた無方向性電磁鋼板の製造方法 |
JP2014086597A (ja) * | 2012-10-24 | 2014-05-12 | Jfe Steel Corp | 鉄損に優れた変圧器鉄心の製造方法 |
Non-Patent Citations (1)
Title |
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See also references of EP3399530A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20190013138A1 (en) | 2019-01-10 |
EP3399530A4 (en) | 2019-08-21 |
KR20180082601A (ko) | 2018-07-18 |
EP3399530A1 (en) | 2018-11-07 |
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