CN1897175A - Iron core for stationary apparatus and stationary apparatus - Google Patents
Iron core for stationary apparatus and stationary apparatus Download PDFInfo
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- CN1897175A CN1897175A CN 200610101725 CN200610101725A CN1897175A CN 1897175 A CN1897175 A CN 1897175A CN 200610101725 CN200610101725 CN 200610101725 CN 200610101725 A CN200610101725 A CN 200610101725A CN 1897175 A CN1897175 A CN 1897175A
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Abstract
This invention arranges electromagnetic steel sheets different in magnetic property at optional lamination thickness ratio in order to equalize magnetic flux distribution within an identical wound core, since a magnetic flux distribution within an iron core for stillness apparatus deviates in magnetic flux toward internal periphery side short in magnetic path with respect to all lamination thickness and small in magnetic resitance, and the internal periphery side concentrated by the magnetic flux increases in iron loss due to high magnetic flux density. A uniformity of the magnetic flux distribution within a cross section of iron core can be obtained by arranging the electromagnetic steel sheets inferior in magnetic property to that of external periphery side in the internal periphery side short in the magnetic path and small in the magnetic resistance, and the electromagnetic steel sheets superior in the magnetic property to that of internal periphery side in the external periphery side long in the magnetic path and big in the magnetic resistance for equalizing the magnetic flux distribution within the iron core for stillness apparatus.
Description
Technical field
The present invention relates to the volume iron core of stationary apparatus such as transformer and reactor, relate to laminated thickness distribution ratio arbitrarily the volume iron core of the electromagnetic steel plate that magnetic characteristic (following expression iron loss, permeability) is arranged of lamination and have the stationary apparatus of this volume iron core in same iron core.
Background technology
With rolling up in the iron core, lamination has the electromagnetic steel plate that has the identical type of identical magnetic characteristic in same iron core at transformer.In recent years, ring as the global warming countermeasure, for transformer develops and reduce iron loss (no-load losses) that takes place in the iron core or the copper loss (load loss) that takes place in coil to the direction of low lossization, the former is designed to like this: the input amount that increases electromagnetic steel plate, guarantee that the sectional area that increases iron core reduces magnetic flux density, perhaps use the low loss electromagnetic steel plate of high price, cause the increase of iron core maximization and cost.
In patent documentation 1 (Japanese patent laid-open 10-270263 communique), record in addition, in the shaping of amorphous sheet component materials, use the relatively poor material of magnetic characteristic inboard, material forms amorphous iron core at the amorphous sheet component materials in the outside preferably.
Summary of the invention
Stationary apparatus is with rolling up the interior magnetic flux distribution of iron core, and general known magnetic flux is partial to interior all sides that the length of magnetic path is short, magnetic resistance is little of the electromagnetic steel plate of lamination.So the magnetic flux density height of interior all sides of the volume iron core of flux concentrating, iron loss worsens, so in order to seek low lossization, it evenly is important making the magnetic flux distribution in the volume iron core.
The objective of the invention is to:, provide a kind of iron core for stationary apparatus that the different electromagnetic steel plate of magnetic characteristic is arranged with laminated thickness ratio arrangement arbitrarily in order in same volume iron core, to make magnetic flux distribution even.
In order to solve above-mentioned problem, in the present invention, short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, the electromagnetic steel plate of all sides in the outer circumferential side configuration magnetic characteristic long in the length of magnetic path, that magnetic resistance is big is better than, make the long-pending interior magnetic flux distribution of core section even thus, prevent that the magnetic flux density of rolling up all sides in the iron core from increasing, and improves iron loss.
In addition, use in the volume iron core at stationary apparatus of the present invention, it is characterized in that: short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, make lamination gross thickness 40% below of its thickness for the volume iron core, its outer circumferential side dispose magnetic characteristic be better than in the electromagnetic steel plate of all sides.
Moreover, it is characterized in that with rolling up in the iron core at stationary apparatus of the present invention: making the electromagnetic steel plate of all sides in the described volume iron core is the high orientation silicon steel plate, and the electromagnetic steel plate that makes its outer circumferential side is a magnetic domain control silicon steel plate.
In addition, in the three-phase three legs volume iron core that iron core, single leg outer iron core constitute in by both legs, it is characterized in that: with at least one leg in U leg, V leg, the W leg by the mode of the different electromagnetic steel plate of magnetic characteristic combination each iron core that is shaped, with in the lamination gross thickness of a leg, the magnetic material that magnetic characteristic is inferior is each iron core that is shaped of the mode below 50%.
In addition, in the stationary apparatus of volume iron core with lamination electromagnetic steel plate formation, it is characterized in that: possess short in the length of magnetic path, that magnetic resistance is little interior all sides and dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, the outer circumferential side long in the length of magnetic path, that magnetic resistance is big dispose magnetic characteristic be better than in the volume iron core of electromagnetic steel plate of all sides.
In addition, in above-mentioned stationary apparatus, it is characterized in that: possess short in the length of magnetic path, that magnetic resistance is little interior all sides and dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, make lamination gross thickness 40% below of its thickness for the volume iron core, its outer circumferential side dispose magnetic characteristic be better than in the volume iron core of electromagnetic steel plate of all sides.
In addition, in above-mentioned stationary apparatus, it is characterized in that: possess and make that the electromagnetic steel plate of all sides is the high orientation silicon steel plate in this volume iron core, the electromagnetic steel plate that makes its outer circumferential side is the iron core of magnetic domain control silicon steel plate.
In addition, in the three-phase three legs volume iron core that iron core, single leg outer iron core constitute in by both legs, it is characterized in that: with at least one leg in U leg, V leg, the W leg by the mode of the different electromagnetic steel plate of magnetic characteristic combination each iron core that is shaped, with in the lamination gross thickness of a leg, the magnetic material that magnetic characteristic is inferior is the be shaped three-phase three legs volumes iron core of each iron core of the mode below 50%.
Description of drawings
Fig. 1 is the stereogram of coiled core of the present invention.
Fig. 2 is the stereogram of existing coiled core.
Fig. 3 is the flux distribution in the existing volume iron core.
Fig. 4 is the front view of property verification of the present invention with iron core.
Fig. 5 represents the checking result of iron loss characteristic of the present invention.
Fig. 6 is the iron loss characteristic comparison diagram of 1.70T of the present invention.
Fig. 7 is the front view of an embodiment of expression three-phase three legs volume of the present invention iron core.
Fig. 8 is the front view of an embodiment of expression three-phase three legs volume of the present invention iron core.
Fig. 9 is the front view of an embodiment of expression three-phase three legs volume of the present invention iron core.
Figure 10 represents to be equipped with the stationary apparatus (transformer) of volume iron core of the present invention.
Embodiment
Below, with reference to the embodiment of description of drawings coiled core of the present invention.
So far, as shown in Figure 2, the congener electromagnetic steel plate lamination that will have the same magnetic characteristic in same iron core gets up to make transformer with the volume iron core, the magnetic flux distribution in this volume iron core 4 as shown in Figure 3, interior all sides that magnetic circuit is short, magnetic resistance is little of the electromagnetic steel plate of magnetic flux deflection lamination.So interior all sides of the volume iron core of flux concentrating, magnetic flux density increases, and iron loss increases.
In volume iron core of the present invention, the electromagnetic steel plate that magnetic characteristic is inferior is configured in the short interior all sides of the length of magnetic path, and the electromagnetic steel plate of all sides was configured in the long outer circumferential side of the length of magnetic path in magnetic characteristic was better than, and makes the magnetic flux distribution in the sectional area of iron core even.
[embodiment 1]
Fig. 1 is the volume iron core of being made by two kinds of different electromagnetic steel plates of magnetic characteristic 1, is the interior all sides that high orientation silicon steel plate 2 are configured in volume iron core 1, and the magnetic domain that magnetic characteristic is better than high orientation silicon steel plate 2 is controlled the volume iron core that silicon steel plate 3 is configured in outer circumferential side.Here so-called high orientation silicon steel plate, be magnetic flux pass through the direction silicon steel plate consistent with the rolling direction of material.So-called magnetic domain control silicon steel plate, be with the high orientation silicon steel plate as raw material, constitute shallow slot in its surface, with the silicon steel plate of magnetic domain sectionalization, its magnetic characteristic is better than the high orientation silicon steel plate.In this coiled core, the No.1～No.4 among Fig. 4 represents the different electromagnetic steel plate of laminated thickness ratio of each electromagnetic steel plate 2,3.The volume iron core of No.1 is in order to carry out the comparison of iron loss characteristic, only to control the volume iron core that silicon steel plate 3 is made by magnetic domain among Fig. 4.Different therewith, the volume iron core of No.2 is all sides in high orientation silicon steel plate 2 is configured in, making its laminated thickness ratio is 25%, and the magnetic domain control silicon steel plate b that magnetic characteristic is better than high orientation silicon steel plate 2 is configured in outer circumferential side, and making the laminated thickness ratio is 75% volume iron core.In the volume iron core of No.3, No.4, be configured to identically with No.2, the laminated thickness ratio of the high orientation silicon steel plate 2 of interior all sides is respectively 50%, 75%.Below explanation is rolled up the result that the iron loss characteristic in iron cores is verified to these.
The excitation property result of the test of the iron loss of each iron core of the No.1～No.4 in Fig. 5 presentation graphs 4, transverse axis is a magnetic flux density, the longitudinal axis is the relative value of iron loss.Magnetic flux density is when 1.55T changes to 1.85T as can be known in Fig. 5, and the characteristic of iron loss is according to the order of No.2, No.1, No.3, No.4 deterioration successively.
In addition, Fig. 6 is the comparison of each core loss value of magnetic flux density when being 1.70T, and expression is with the core loss value of the No.1 relative value (the mensuration frequency is 50Hz) as each iron loss of 100% o'clock.In Fig. 6, what present best core loss value is No.2 volume iron core, is under the 1.70T in magnetic flux density, has approximately improved 2% than the core loss value of the volume iron core that only is made of magnetic domain control silicon steel plate 3 of No.1.If the laminated thickness ratio of the high orientation silicon steel plate 2 of interior all sides reaches more than 50% in addition, then iron loss presents the tendency of increase.
Generally speaking known, the magnetic flux in the volume iron core is partial to the little interior all sides of the short magnetic resistance of magnetic circuit for whole laminated thickness.In this checking by high orientation silicon steel plate 2 is configured in the volume iron core interior all sides, with magnetic characteristic be better than high orientation silicon steel plate 2, be that the high magnetic domain of permeability control silicon steel plate 3 is configured in outer circumferential side, make the magnetic flux distribution in the sectional area of iron core even, improved iron loss.But, even can confirm all sides in the high orientation silicon steel plate 2 that magnetic characteristic is more inferior than outer circumferential side is configured in by this result of the test, its laminated thickness ratio has been reached in the volume iron core more than 50%, and the input amount that presents high orientation silicon steel plate 2 increases, the tendency that iron loss increases.As known from the above, be configured in the laminated thickness ratio of the magnetic characteristic of all sides high orientation silicon steel plate b more inferior than outer circumferential side preferably below 40%.
The long-pending iron loss of obtaining iron core with the intrinsic iron loss of each electromagnetic steel plate (W/Kg) characteristic and service quality (Kg).Even lamination has under the situation of the different electromagnetic steel plate of magnetic characteristic in same iron core, in theory also consider iron loss long-pending and that obtain iron core with the intrinsic iron loss of each electromagnetic steel plate (W/Kg) characteristic and service quality (Kg).But, with magnetic characteristic than the inferior electromagnetic steel plate of outer circumferential side with the interior all side of suitable laminated thickness ratio arrangement at the volume iron core, can verify that also the magnetic flux distribution in the sectional area of iron core is even, can obtain the core loss value littler than above-mentioned iron loss theoretical value.Therefore, even use the cheap inferior electromagnetic steel plate of magnetic characteristic, also can make the volume iron core of the low price that has suppressed the iron loss increment rate in interior all sides of volume iron core.
[embodiment 2]
Fig. 7 is by two inboard volume iron core 5a and surrounds the three-phase three legs volume iron core that outside volume iron core 6a constitutes of their configurations, be that grain-oriented silicon steel sheet 7a, 9a are configured in interior all sides of respectively rolling up iron core, magnetic characteristic is better than the high orientation silicon steel plate 8a of grain-oriented silicon steel sheet, the volume iron core that 10a is configured in outer circumferential side.Three-phase three legs among Fig. 7 volume iron core is that the laminated thickness ratio of grain-oriented silicon steel sheet 7a, the 9a of inboard iron core 5a, outside iron core 6a interior all sides of all disposing the rolling iron core is 25% three-phase three legs volume iron core.The overall laminated thickness ratio of U leg, V leg, W leg in three-phase among Fig. 7 three legs volumes iron core is in any one leg in addition, and grain-oriented silicon steel sheet all is 25%.
Three-phase three legs volume iron core among Fig. 8 is made of an outside volume iron core 6b of two inboard volume iron core 5b and their configurations of encirclement, be the interior all sides that grain-oriented silicon steel sheet 7b are configured in inboard volume iron core 5b, 8b is configured in outer circumferential side with the high orientation silicon steel plate, high orientation silicon steel plate 10b is configured in interior all sides that iron core 6b is rolled up in the outside, grain-oriented silicon steel sheet 9b is configured in the three-phase three legs volume iron core of outer circumferential side.Three-phase three legs among Fig. 8 volume iron core is that to make the laminated thickness ratio of the grain-oriented silicon steel sheet 7b of the interior all sides that are configured in inboard volume iron core 5b be 25%, and the laminated thickness ratio that makes the grain-oriented silicon steel sheet 9b of the outer circumferential side that is configured in outside volume iron core 6b is 25% three-phase three legs volume iron core.In addition, the overall laminated thickness ratio of U leg, V leg, the W leg in the three-phase three legs shown in Figure 8 volume iron core is in leg arbitrarily, and grain-oriented silicon steel sheet all is 25%.
Three-phase three legs volume iron core among Fig. 9 is made of an outside volume iron core 6c of two inboard volume iron core 5c and their configurations of encirclement, be the interior all sides that grain-oriented silicon steel sheet 7c are configured in inboard volume iron core 5c, 8c is configured in outer circumferential side with the high orientation silicon steel plate, and three-phase three legs that all high orientation silicon steel plate 10c are configured among the volume iron core 6c of the outside are rolled up iron core.In addition, the laminated thickness ratio of the grain-oriented silicon steel sheet 7c of all sides was 50% in this inboard volume iron core 5c was configured to make and is configured in.The overall laminated thickness ratio of U leg, V leg, W leg in the three-phase three legs volume iron core shown in Figure 9 in addition, with regard to the laminated thickness ratio of grain-oriented silicon steel sheet, the U leg is 25%, and the V leg is 50%, and the W leg is 25%.
The long-pending iron loss of obtaining iron core with the intrinsic iron loss of each electromagnetic steel plate (W/Kg) characteristic and service quality (Kg).Even lamination has under the situation of the different electromagnetic steel plate of magnetic characteristic in same iron core, in theory also consider iron loss long-pending and that obtain iron core with the intrinsic iron loss of each electromagnetic steel plate (W/Kg) characteristic and service quality (Kg).
But, according to the present invention, with magnetic characteristic than the inferior electromagnetic steel plate of outer circumferential side with laminated thickness ratio arrangement arbitrarily in interior all sides of volume iron core, also can obtain the core loss value littler than above-mentioned iron loss theoretical value, even use the inferior electromagnetic steel plate of cheap magnetic characteristic, also can make the low volume iron core of price that has suppressed the iron loss increment rate.
[embodiment 3]
Figure 10 represents to have above-mentioned volume iron core, promptly have the electromagnetic steel plate that magnetic characteristic is more inferior than outer circumferential side and be configured in interior all sides that the length of magnetic path is short, magnetic resistance is little, the electromagnetic steel plate of all sides was configured in the stationary apparatus 11 of the volume iron core of the outer circumferential side that the length of magnetic path is long, magnetic resistance is big in magnetic characteristic was better than.
In addition, in above-mentioned stationary apparatus, expression has, and interior all sides short in the length of magnetic path, that magnetic resistance is little dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, and make lamination gross thickness 40% below of its thickness for the volume iron core, its outer circumferential side dispose magnetic characteristic be better than in the stationary apparatus 11 of volume iron core of electromagnetic steel plate of all sides.
In addition, in above-mentioned stationary apparatus, expression has makes that the electromagnetic steel plate of all sides is the high orientation silicon steel plate in this volume iron core, and the electromagnetic steel plate that makes its outer circumferential side is the stationary apparatus 11 that magnetic domain is controlled the volume iron core of silicon steel plate.
In addition, in the stationary apparatus of the three-phase three legs volume iron core that iron core, single leg outer iron core constitute in having by both legs, expression has each iron core of such formation, be that at least one leg is combined by the different electromagnetic steel plate of magnetic characteristic in U leg, V leg, the W leg, in the lamination gross thickness of a leg, the magnetic material that magnetic characteristic is inferior is the stationary apparatus 11 of the three-phase three legs volume iron core below 50%.
Claims (8)
1. an iron core for stationary apparatus is the stationary apparatus volume iron core that the electromagnetic steel plate lamination is constituted, and it is characterized in that:
Short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, the outer circumferential side long in the length of magnetic path, that magnetic resistance is big dispose magnetic characteristic be better than in the electromagnetic steel plate of all sides.
2. stationary apparatus according to claim 1 is characterized in that with rolling up iron core:
Short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, make lamination gross thickness 40% below of its thickness for the volume iron core, its outer circumferential side dispose magnetic characteristic be better than in the electromagnetic steel plate of all sides.
3. stationary apparatus according to claim 1 is characterized in that with rolling up iron core:
Making the electromagnetic steel plate of all sides in the described volume iron core is the high orientation silicon steel plate, and the electromagnetic steel plate that makes its outer circumferential side is a magnetic domain control silicon steel plate.
4. three-phase three a legs volume iron core is made of the interior iron core of both legs, the outer iron core of single leg, it is characterized in that:
With at least one leg in U leg, V leg, the W leg by the mode of the different electromagnetic steel plate of magnetic characteristic combination each iron core that is shaped,
With in the lamination gross thickness of a leg, the magnetic material that magnetic characteristic is inferior is each iron core that is shaped of the mode below 50%.
5. stationary apparatus has the lamination electromagnetic steel plate and the volume iron core that constitutes, it is characterized in that possessing:
Short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, the outer circumferential side long in the length of magnetic path, that magnetic resistance is big dispose magnetic characteristic be better than in the volume iron core of electromagnetic steel plate of all sides.
6. stationary apparatus according to claim 5 is characterized in that possessing:
Short in the length of magnetic path, that magnetic resistance is little interior all sides dispose the magnetic characteristic electromagnetic steel plate more inferior than outer circumferential side, make lamination gross thickness 40% below of its thickness for the volume iron core, its outer circumferential side dispose magnetic characteristic be better than in the volume iron core of electromagnetic steel plate of all sides.
7. stationary apparatus according to claim 5 is characterized in that possessing:
Making the electromagnetic steel plate of all sides in this volume iron core is the high orientation silicon steel plate, and the electromagnetic steel plate that makes its outer circumferential side is the iron core of magnetic domain control silicon steel plate.
8. a stationary apparatus possesses the three-phase three legs volume iron core that is made of iron core, single leg outer iron core in the both legs, it is characterized in that possessing:
With at least one leg in U leg, V leg, the W leg by the mode of the different electromagnetic steel plate of magnetic characteristic combination each iron core that is shaped,
With in the lamination gross thickness of a leg, the magnetic material that magnetic characteristic is inferior is the be shaped three-phase three legs volumes iron core of each iron core of the mode below 50%.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005199545 | 2005-07-08 | ||
| JP2005199545 | 2005-07-08 | ||
| JP2005-199545 | 2005-07-08 | ||
| JP2005289510A JP4959170B2 (en) | 2005-07-08 | 2005-10-03 | Iron core for stationary equipment |
| JP2005-289510 | 2005-10-03 | ||
| JP2005289510 | 2005-10-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1897175A true CN1897175A (en) | 2007-01-17 |
| CN1897175B CN1897175B (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101017255A Expired - Fee Related CN1897175B (en) | 2005-07-08 | 2006-07-07 | Iron core for stationary apparatus and stationary apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JP5286292B2 (en) |
| CN (1) | CN1897175B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735843A (en) * | 2014-11-25 | 2018-02-23 | 艾普伦 | For the magnetic core of the infrastructure component of power transformer magnetic core, including the infrastructure component, the method for the magnetic core and the transformer including the magnetic core are manufactured |
| CN112313762A (en) * | 2018-10-03 | 2021-02-02 | 日本制铁株式会社 | Roll iron core and transformer |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897175B (en) * | 2005-07-08 | 2012-07-18 | 株式会社日立产机*** | Iron core for stationary apparatus and stationary apparatus |
| WO2011158290A1 (en) | 2010-06-16 | 2011-12-22 | 株式会社日立製作所 | Static electromagnetic apparatus |
| CN102136358B (en) | 2011-01-13 | 2012-12-19 | 上海诺雅克电气有限公司 | Power supply current transformer for electronic protection |
| JP2012204745A (en) * | 2011-03-28 | 2012-10-22 | Kitashiba Electric Co Ltd | Iron core reactor |
| US11984249B2 (en) | 2018-01-31 | 2024-05-14 | Jfe Steel Corporation | Grain-oriented electrical steel sheet, wound transformer core using the same, and method for producing wound core |
| WO2023007953A1 (en) | 2021-07-30 | 2023-02-02 | Ｊｆｅスチール株式会社 | Wound core and wound core manufacturing method |
| KR20240021277A (en) | 2021-07-30 | 2024-02-16 | 제이에프이 스틸 가부시키가이샤 | Winding iron core and manufacturing method of the winding iron core |
| WO2023007952A1 (en) | 2021-07-30 | 2023-02-02 | Ｊｆｅスチール株式会社 | Wound core and wound core manufacturing method |
| KR20240021276A (en) | 2021-07-30 | 2024-02-16 | 제이에프이 스틸 가부시키가이샤 | Winding iron core and manufacturing method of the winding iron core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6028129B2 (en) * | 1978-10-13 | 1985-07-03 | 株式会社日立製作所 | Wound core for transformer |
| US4205288A (en) * | 1978-10-27 | 1980-05-27 | Westinghouse Electric Corp. | Transformer with parallel magnetic circuits of unequal mean lengths and loss characteristics |
| JPS5926221U (en) * | 1982-08-09 | 1984-02-18 | 三菱電機株式会社 | wound iron core |
| JPS59175110A (en) * | 1983-03-24 | 1984-10-03 | Hitachi Ltd | Wound core type stationary induction electric apparatus |
| JPS6115309A (en) * | 1984-07-02 | 1986-01-23 | Kawasaki Steel Corp | Wound core for transformer with low iron loss |
| JPH03268311A (en) * | 1990-03-19 | 1991-11-29 | Toshiba Corp | Iron core of transformer |
| JPH03198312A (en) * | 1989-12-27 | 1991-08-29 | Tamura Seisakusho Co Ltd | Iron core for swinging choke coil and its manufacture |
| JPH06120044A (en) * | 1991-04-17 | 1994-04-28 | Nippon Steel Corp | Low-noise transformer core |
| JPH05101943A (en) * | 1991-05-08 | 1993-04-23 | Toshiba Corp | Three-phase wound core |
| JP2003142318A (en) * | 2001-11-01 | 2003-05-16 | Hitachi Ltd | Gas-insulated transformer |
| JP2006185999A (en) * | 2004-12-27 | 2006-07-13 | Nippon Steel Corp | Method of manufacturing low-building factor iron core for transformer and reactor |
| CN1897175B (en) * | 2005-07-08 | 2012-07-18 | 株式会社日立产机*** | Iron core for stationary apparatus and stationary apparatus |
| JP4959170B2 (en) * | 2005-07-08 | 2012-06-20 | 株式会社日立産機システム | Iron core for stationary equipment |
-
2006
- 2006-07-07 CN CN2006101017255A patent/CN1897175B/en not_active Expired - Fee Related
-
2010
- 2010-01-18 JP JP2010007698A patent/JP5286292B2/en active Active
-
2012
- 2012-05-11 JP JP2012109075A patent/JP5544393B2/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735843A (en) * | 2014-11-25 | 2018-02-23 | 艾普伦 | For the magnetic core of the infrastructure component of power transformer magnetic core, including the infrastructure component, the method for the magnetic core and the transformer including the magnetic core are manufactured |
| CN107735843B (en) * | 2014-11-25 | 2021-01-05 | 艾普伦 | Base assembly for a magnetic core of a power transformer, magnetic core comprising such a base assembly, method for manufacturing such a magnetic core and transformer comprising such a magnetic core |
| CN112313762A (en) * | 2018-10-03 | 2021-02-02 | 日本制铁株式会社 | Roll iron core and transformer |
| CN112313762B (en) * | 2018-10-03 | 2024-02-09 | 日本制铁株式会社 | Coiled iron core and transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5544393B2 (en) | 2014-07-09 |
| JP2012169666A (en) | 2012-09-06 |
| JP2010087536A (en) | 2010-04-15 |
| CN1897175B (en) | 2012-07-18 |
| JP5286292B2 (en) | 2013-09-11 |
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