JP2003077747A - Method of manufacturing noise suppressing laminated core and noise suppressing structure electromagnetic steel plate - Google Patents
Method of manufacturing noise suppressing laminated core and noise suppressing structure electromagnetic steel plateInfo
- Publication number
- JP2003077747A JP2003077747A JP2001262308A JP2001262308A JP2003077747A JP 2003077747 A JP2003077747 A JP 2003077747A JP 2001262308 A JP2001262308 A JP 2001262308A JP 2001262308 A JP2001262308 A JP 2001262308A JP 2003077747 A JP2003077747 A JP 2003077747A
- Authority
- JP
- Japan
- Prior art keywords
- iron core
- noise
- electromagnetic steel
- electromagnetic
- laminated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Regulation Of General Use Transformers (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、騒音を抑制したい
電磁機器、特に騒音抑制積層鉄心の製造方法及び騒音抑
制構造電磁鋼板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic device for suppressing noise, and more particularly to a method for manufacturing a noise-suppressing laminated iron core and a noise-suppressing structure electromagnetic steel sheet.
【０００２】[0002]
【従来の技術】積層鉄心を使用した電磁機器、一般的に
は乾式，モールドおよび油入変圧器，リアクトル，電磁
攪拌装置等においては、磁歪により鉄心が振動して騒音
を発生する。変圧器，リアクトル等電磁機器の騒音発生
源は、主に鉄心及びコイルである。その中で、騒音発生
割合は鉄心が大半を占めるために、鉄心の騒音低減を行
うことで、電磁機器の騒音低減が図れる。これらの製品
の鉄心は、一般的に０．２３〜０．３５ｍｍ厚の電磁鋼
板を規定枚数積み重ねて構成するため、一枚ごとに磁歪
を起こし騒音を発生する。このため、この電磁鋼板を一
枚一枚樹脂で固着することにより、磁歪を抑制して騒音
低減を図っていた。2. Description of the Related Art In an electromagnetic device using a laminated iron core, generally a dry type, a mold and an oil-filled transformer, a reactor, an electromagnetic stirrer, etc., the iron core vibrates due to magnetostriction to generate noise. Noise sources of electromagnetic equipment such as transformers and reactors are mainly iron cores and coils. Among them, since the iron core occupies most of the noise generation rate, the noise of the electromagnetic equipment can be reduced by reducing the noise of the iron core. Since the iron cores of these products are generally formed by stacking a specified number of electromagnetic steel sheets having a thickness of 0.23 to 0.35 mm, magnetostriction occurs and noise is generated for each sheet. Therefore, by fixing the electromagnetic steel sheets one by one with resin, magnetostriction is suppressed to reduce noise.
【０００３】本発明者らは積層鉄心を構成する電磁鋼板
の積層端面に接着性樹脂を塗布し積層鉄心を固着するこ
とを試みた。図４を参照して、本発明者らが試みた例を
説明する。図４は変圧器の積層鉄心間の固着を説明する
模式図である。（ａ）は正面図、（ｂ）はＡ−Ａ’から
みた側面図、（ｃ）は電磁鋼板１枚における接着性樹脂
の浸透状況を示す。図中、１は電磁鋼板（例えば珪素鋼
板）、２は脚鉄心、３はヨーク鉄心、４は積層鉄心を締
めつけるバンド、５は接着性樹脂を表している。鉄心の
組み立ては、電磁鋼板１を周知の方法で積層して組み立
てた。その後、鉄心の積層端面に接着性樹脂を塗布し
た。The present inventors have tried to fix the laminated iron core by applying an adhesive resin to the laminated end faces of the magnetic steel sheets constituting the laminated iron core. An example that the present inventors have tried will be described with reference to FIG. FIG. 4 is a schematic diagram for explaining the adhesion between the laminated iron cores of the transformer. (A) is a front view, (b) is a side view seen from AA ', and (c) shows the permeation state of the adhesive resin in one magnetic steel sheet. In the figure, 1 is an electromagnetic steel plate (for example, silicon steel plate), 2 is a leg iron core, 3 is a yoke iron core, 4 is a band for fastening a laminated iron core, and 5 is an adhesive resin. The iron core was assembled by laminating the electromagnetic steel sheets 1 by a known method. Then, an adhesive resin was applied to the laminated end surface of the iron core.
【０００４】この時の塗布した接着性樹脂の積層面の浸
透状態は、図４（ｃ）のようであった。鉄心はバンド４
で締め付け加工されているため、積層面の電磁鋼板一枚
一枚の間に間隙がなく、塗布した接着性樹脂は内部に浸
透しにくいことを示している。接着性樹脂は積層面（端
面）のみに浸透して、その部分のみの固着に留まってい
る。そのため電磁鋼板の固着が充分でなく、磁歪を抑制
する効果が極めて少なく、騒音が抑制できる効果が少な
いという問題があった。The permeation state of the applied adhesive resin on the laminated surface at this time was as shown in FIG. 4 (c). Band 4
Since there is no space between the electromagnetic steel sheets on the laminated surface, the applied adhesive resin is unlikely to permeate into the interior since it is tightened by. The adhesive resin permeates only the laminated surface (end surface) and remains fixed only at that portion. Therefore, there is a problem that the magnetic steel sheet is not firmly fixed, the effect of suppressing magnetostriction is extremely small, and the effect of suppressing noise is small.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、大型の製造
装置を使用することなく、簡単な製造方法で、積層鉄心
の積層内の全面に接着性樹脂を供給し、電磁鋼板の一枚
一枚全面を接着させ、鉄心が一つの塊となるようにし
て、磁歪を抑制することを目的とする。SUMMARY OF THE INVENTION According to the present invention, an adhesive resin is supplied to the entire surface of a laminated core of a laminated iron core by a simple manufacturing method without using a large-sized manufacturing apparatus, and each of the electromagnetic steel sheets is The purpose is to suppress the magnetostriction by bonding the entire surfaces of the sheets so that the iron core becomes one lump.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を解
決するために、一枚の電磁鋼板の少なくとも片面に端面
まで通じる機械的な溝を一定間隔で加工した電磁鋼板、
及びこの電磁鋼板の溝加工されていない面同士が重なら
ないように電磁鋼板を積層して鉄心を組立て、積層端面
に接着性樹脂を塗布して、積層鉄心を製造する方法を提
供する。積層端面に塗布された接着性樹脂は上記加工溝
を伝わって供給され、毛細管現象により積層鉄心内部に
浸透していき、電磁鋼板一枚一枚が全面にわたって一様
に接着し、鉄心がいわば一つの塊となり磁歪を抑制す
る。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a magnetic steel sheet obtained by processing at least one surface of a single magnetic steel sheet with mechanical grooves extending to an end surface at regular intervals.
And a method of manufacturing a laminated iron core by laminating electromagnetic steel sheets so as not to overlap the non-grooved surfaces of the electromagnetic steel sheets to assemble an iron core and applying an adhesive resin to the laminated end faces. The adhesive resin applied to the laminated end surface is supplied through the above-mentioned processing groove and penetrates into the laminated iron core due to the capillary phenomenon, and the electromagnetic steel sheets are uniformly adhered to each other over the entire surface. It becomes one lump and suppresses magnetostriction.
【０００７】[0007]
【発明の実施の形態】図１〜図３を参照して本発明の実
施例を説明する。図１は本発明の製造方法によって製造
された変圧器鉄心を模式的に示す。（ａ）は正面図、
（ｂ）はＡ−Ａ’からみた側面図、（ｃ）は表面を溝加
工した電磁鋼板（例えば珪素鋼板）の２例、（ｄ）は鉄
心Ｂ−Ｂ’断面、（ｅ）は接着性樹脂の塗布状況を示
す。図中、６は加工溝、Ｓの矢印方向の端面は例示的に
示された接着性樹脂の塗布面を表す。電磁鋼板１は図１
（ｃ）のように、鋼板幅面に対して平行に又は角度をも
って、周知の加工手段で両側端面まで通じる溝６が加工
されている。なお、本明細書及び図面で同じ参照符号を
使用したものは、同一構成を表すので、説明を省略す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows a transformer core manufactured by the manufacturing method of the present invention. (A) is a front view,
(B) is a side view as seen from AA ', (c) is two examples of electromagnetic steel sheets (for example, silicon steel sheets) whose surface is grooved, (d) is an iron core BB' cross section, and (e) is adhesiveness. The application status of the resin is shown. In the figure, 6 is a processed groove, and the end surface of S in the direction of the arrow represents the adhesive resin application surface shown as an example. Magnetic steel sheet 1 is shown in Figure 1.
As shown in (c), the groove 6 communicating with both end faces is formed by a known processing means in parallel with or at an angle to the steel plate width surface. Note that the same reference numerals are used in the present specification and the drawings to indicate the same configurations, and thus the description thereof will be omitted.
【０００８】図２は本発明の製造方法を説明するフロー
図を示す。ステップＳ１で、電磁鋼板の片面の幅方向
に、一定間隔で両側端面まで通じる深さ１３μｍ程度の
機械的加工溝６を施す（図１（ｃ）参照）。ステップＳ
２で、溝加工を施さない面同士が重ならないように規定
枚数積み上げる。ステップＳ３で、締付けバンド４によ
り積み上げた電磁鋼板を固定し、鉄心を形成する。ステ
ップＳ４で、スプレー又は刷毛により積層端面に接着性
樹脂を塗布する。接着性樹脂は、硬化時間が数時間（常
温）の接着性を有する樹脂を使用し、耐絶縁性があり比
較的低粘度（常温）の方が浸透し易いので好都合であ
る。ステップＳ５で、鉄心を１００°Ｃ程度に加温して
おけば接着性樹脂の浸透性はより向上し、作業時間が短
縮する。ステップＳ４において、鉄心の上側端面を塗布
する場合は、接着性樹脂は重力も作用し、電磁鋼板間の
全面に更に浸透し易くなる。それゆえ、小型電磁機器の
場合は電磁機器を回転することにより、浸透をより効果
的にすることができる。FIG. 2 shows a flow chart for explaining the manufacturing method of the present invention. In step S1, mechanically machined grooves 6 having a depth of about 13 μm are formed at regular intervals in the width direction of one surface of the electromagnetic steel sheet (see FIG. 1C). Step S
In step 2, stack the specified number of sheets so that the ungrooved surfaces do not overlap. In step S3, the electromagnetic steel plates stacked by the tightening band 4 are fixed to form an iron core. In step S4, an adhesive resin is applied to the laminated end surface by spraying or brushing. As the adhesive resin, a resin having an adhesive property with a curing time of several hours (at room temperature) is used, and it is advantageous that it has insulation resistance and relatively low viscosity (at room temperature) because it is easy to penetrate. If the iron core is heated to about 100 ° C. in step S5, the permeability of the adhesive resin is further improved and the working time is shortened. In step S4, when the upper end surface of the iron core is applied, the adhesive resin also acts on gravity, and is more likely to penetrate into the entire surface between the electromagnetic steel plates. Therefore, in the case of a small electromagnetic device, the penetration can be made more effective by rotating the electromagnetic device.
【０００９】図１の実施例では、接着性樹脂として、ス
リーボンド社製二液性エポキシ配合樹脂（本剤：＃２０
２３Ｂ，硬化剤：＃２１０５Ｐ）を本剤対硬化剤の配合
比を１００：６０で使用した。積層端面塗布の際、塗布
作業は鉄心の組み立て作業完了状態のままで、下面以外
の３面を塗布することで毛細管現象により電磁鋼板間全
面に鉄心接着性樹脂が十分浸透する。加工溝の大きさ、
間隔、角度は、塗布する接着性樹脂の浸透度及び製造ス
テップＳ５の温度及び時間によって決定される。他の実
施例として一端面のみに通じる溝でも、又加工溝を電磁
鋼板の両面に設けるようにしても良い。In the embodiment of FIG. 1, as an adhesive resin, a two-component epoxy compound resin (this agent: # 20) manufactured by ThreeBond Co., Ltd.
23B, curing agent: # 2105P) was used at a compounding ratio of this agent to the curing agent of 100: 60. At the time of applying the laminated end faces, the iron core adhesive resin sufficiently penetrates between the magnetic steel sheets by the capillary phenomenon by applying the three faces other than the lower face while the iron core assembly work is completed in the coating work. Size of processing groove,
The interval and the angle are determined by the penetration of the adhesive resin to be applied and the temperature and time of the manufacturing step S5. As another embodiment, a groove that communicates only with one end surface or a processed groove may be provided on both surfaces of the electromagnetic steel sheet.
【００１０】図３は、本発明を採用した場合とそうでな
い場合についてＨＶＣ（ＨｉｇｈｔＶｏｌｔａｇｅ Ｃ
ｏｎｔｒｏｌ）用多重変圧器（特開２０００−２６９０
４６号公報参照）における騒音測定結果の比較例を示
す。図３の（１）はタンクに収納されていない鉄心単器
における周辺の位置〜 での平均騒音測定結果を、
図の（２）はＨＶＣ用多重変圧器における周辺の位置
〜 での平均騒音測定結果を示す。鉄心単器では１
５ｄＢ，ＨＶＣ用多重変圧器では１１ｄＢ騒音は低減さ
れている。FIG. 3 shows HVC (High Voltage C) for cases where the present invention is adopted and cases where it is not.
multiple transformer for control (Japanese Patent Laid-Open No. 2000-2690)
A comparative example of the noise measurement result in Japanese Patent No. 46) is shown. Fig. 3 (1) shows the average noise measurement results at the surrounding positions in the iron core unit not stored in the tank,
(2) in the figure shows the surrounding position in the HVC multiple transformer
The average noise measurement results at are shown. 1 for an iron core unit
In the 5dB, HVC multiple transformer, 11dB noise is reduced.
【００１１】[0011]
【発明の効果】（１）鉄心固着用樹脂を積層鉄心の内部
まで一様に浸透させることができ、磁歪による振動を効
果的に抑制できる。
（２）他の騒音低減方法に比べ、比較的低コストで高い
騒音低減効果が期待できる。
（３）積層鉄心を使用している大半の電磁機器に使用で
き、汎用性がある。(1) The resin for fixing the iron core can be uniformly permeated into the laminated iron core, and vibration due to magnetostriction can be effectively suppressed. (2) As compared with other noise reduction methods, a high noise reduction effect can be expected at a relatively low cost. (3) It can be used for most electromagnetic devices using laminated iron cores and has versatility.
【００１２】更に、次の効果も有する。
（４）接着性樹脂を電磁鋼板一枚毎に塗布し積み上げて
組み立てる必要がなく、バンド等により固定加工した状
態で端面塗布することにより十分な固着ができるので、
作業性が良く、しかも、真空含浸設備、高温加熱装置等
など大型で高価な設備が不要である。
（５）電磁機器の騒音低減方法として、防音壁・防音タ
ンクの採用、鉄心磁束密度の低減、鉄心のステップラッ
プ積み方式及び防振ゴムがある。これらの騒音抑制方式
に加え本発明の方法を併用することにより、コスト低減
が可能となる効果を有する。Further, it also has the following effects. (4) It is not necessary to apply the adhesive resin to each of the electromagnetic steel sheets, stack and assemble them, and the application of the end face in a state of being fixedly processed with a band or the like allows sufficient fixation,
It has good workability and does not require large and expensive equipment such as vacuum impregnation equipment and high temperature heating equipment. (5) As a method of reducing noise of electromagnetic equipment, there are a soundproof wall and a soundproof tank, reduction of the magnetic flux density of the iron core, a step lap stacking method of the iron core, and an anti-vibration rubber. By using the method of the present invention together with these noise suppression methods, it is possible to reduce the cost.
【図１】本発明を適用した変圧器鉄心例を示す。FIG. 1 shows an example of a transformer core to which the present invention is applied.
【図２】本発明の製造方法を説明するフロー図を示す。FIG. 2 shows a flow chart for explaining the manufacturing method of the present invention.
【図３】本発明を適用した場合とそうでない場合につい
てＨＶＣ用多重変圧器の騒音測定結果を示す図である。FIG. 3 is a diagram showing noise measurement results of an HVC multiple transformer with and without application of the present invention.
【図４】従来方法で製造された変圧器鉄心例を示す。FIG. 4 shows an example of a transformer core manufactured by a conventional method.
１ 電磁鋼板 ２ 脚鉄心 ３ ヨーク鉄心 ４ バンド ５ 接着性樹脂 ６ 加工溝 Ｓ 塗布面 1 Magnetic steel sheet 2 legs iron core 3 York iron core 4 bands 5 Adhesive resin 6 Processing groove S coated surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中田 ▲よし▼也 広島県広島市南区大州４丁目４番32号 中 国電機製造株式会社内 (72)発明者 岩井 圭三 広島県広島市南区大州４丁目４番32号 中 国電機製造株式会社内 (72)発明者 山本 紀宏 福岡県北九州市戸畑区飛幡町１番１号 新 日本製鐵株式会社八幡製鐵所内 Ｆターム(参考） 5E058 AA25 5E062 AA01 AC01 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Nakata ▲ Yoshi ▼ ya Hiroshima Prefecture Hiroshima City Minami-ku 4-34 Oshu Kuniki Manufacturing Co., Ltd. (72) Inventor Keizo Iwai Hiroshima Prefecture Hiroshima City Minami-ku 4-34 Oshu Kuniki Manufacturing Co., Ltd. (72) Inventor Norihiro Yamamoto No. 1-1 Tobatacho, Tobata-ku, Kitakyushu City, Fukuoka Prefecture New Nippon Steel Co., Ltd., Yawata Works F-term (reference) 5E058 AA25 5E062 AA01 AC01
Claims (2)
磁鋼板を少なくとも溝を加工しない面同士が重ならない
ように積層し、固定具で締めつけ固定した後、積層端面
に樹脂等の接着剤を塗布し、溝を伝わって鉄心内部まで
固着させることを特徴とする騒音抑制積層鉄心の製造方
法。1. An electromagnetic steel sheet having a mechanical groove extending to the end face is laminated so that at least the faces not to be grooved do not overlap each other, and the components are fastened and fixed with a fixture, and then an adhesive such as resin is attached to the laminated end face. A method for manufacturing a noise-suppressing laminated iron core, which comprises applying and fixing the iron through the groove to the inside of the iron core.
平行又は角度をもって溝加工処理したことを特徴とする
騒音抑制用電磁鋼板。2. A noise-suppressing electromagnetic steel sheet, characterized in that a groove is processed in parallel or at an angle to the end surface of the width surface of the electromagnetic steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001262308A JP3799252B2 (en) | 2001-08-30 | 2001-08-30 | Manufacturing method of noise-suppressing laminated iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001262308A JP3799252B2 (en) | 2001-08-30 | 2001-08-30 | Manufacturing method of noise-suppressing laminated iron core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003077747A true JP2003077747A (en) | 2003-03-14 |
| JP3799252B2 JP3799252B2 (en) | 2006-07-19 |
Family
ID=19089223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001262308A Expired - Fee Related JP3799252B2 (en) | 2001-08-30 | 2001-08-30 | Manufacturing method of noise-suppressing laminated iron core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3799252B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004289136A (en) * | 2003-03-06 | 2004-10-14 | Nippon Steel Corp | Electromagnetic steel sheet for core |
| KR20180097229A (en) * | 2017-02-23 | 2018-08-31 | 현대일렉트릭앤에너지시스템(주) | Core of transformer |
| WO2018181831A1 (en) | 2017-03-30 | 2018-10-04 | Ｊｆｅスチール株式会社 | Transformer iron core |
| WO2019189857A1 (en) | 2018-03-30 | 2019-10-03 | Ｊｆｅスチール株式会社 | Iron core for transformer |
| WO2019189859A1 (en) | 2018-03-30 | 2019-10-03 | Ｊｆｅスチール株式会社 | Iron core for transformer |
| KR20200125706A (en) | 2018-03-30 | 2020-11-04 | 제이에프이 스틸 가부시키가이샤 | Iron core for transformer |
| KR20200125705A (en) | 2018-03-30 | 2020-11-04 | 제이에프이 스틸 가부시키가이샤 | Iron core for transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725138A (en) * | 1980-07-21 | 1982-02-09 | Mitsui Haitetsuku:Kk | Manufacture of laminated core |
| JPH04121718U (en) * | 1991-04-17 | 1992-10-30 | サンケン電気株式会社 | laminated core |
| JPH05121224A (en) * | 1991-10-24 | 1993-05-18 | Kawasaki Steel Corp | Grain oriented electromagnetic steel sheet small in iron loss and its production |
| JPH06271997A (en) * | 1993-03-22 | 1994-09-27 | Kawasaki Steel Corp | Silicon steel sheet for laminated iron core excellent in end face weldability |
| JP2000260631A (en) * | 1999-03-11 | 2000-09-22 | Kawasaki Steel Corp | Winding transformer with small building factor and low iron loss of actual machine |
-
2001
- 2001-08-30 JP JP2001262308A patent/JP3799252B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725138A (en) * | 1980-07-21 | 1982-02-09 | Mitsui Haitetsuku:Kk | Manufacture of laminated core |
| JPH04121718U (en) * | 1991-04-17 | 1992-10-30 | サンケン電気株式会社 | laminated core |
| JPH05121224A (en) * | 1991-10-24 | 1993-05-18 | Kawasaki Steel Corp | Grain oriented electromagnetic steel sheet small in iron loss and its production |
| JPH06271997A (en) * | 1993-03-22 | 1994-09-27 | Kawasaki Steel Corp | Silicon steel sheet for laminated iron core excellent in end face weldability |
| JP2000260631A (en) * | 1999-03-11 | 2000-09-22 | Kawasaki Steel Corp | Winding transformer with small building factor and low iron loss of actual machine |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4663249B2 (en) * | 2003-03-06 | 2011-04-06 | 新日本製鐵株式会社 | Magnetic steel sheet for iron core |
| JP2004289136A (en) * | 2003-03-06 | 2004-10-14 | Nippon Steel Corp | Electromagnetic steel sheet for core |
| KR102278954B1 (en) | 2017-02-23 | 2021-07-19 | 현대일렉트릭앤에너지시스템(주) | Core of transformer |
| KR20180097229A (en) * | 2017-02-23 | 2018-08-31 | 현대일렉트릭앤에너지시스템(주) | Core of transformer |
| WO2018181831A1 (en) | 2017-03-30 | 2018-10-04 | Ｊｆｅスチール株式会社 | Transformer iron core |
| KR20190110129A (en) | 2017-03-30 | 2019-09-27 | 제이에프이 스틸 가부시키가이샤 | Transformer iron core |
| US11430599B2 (en) | 2017-03-30 | 2022-08-30 | Jfe Steel Corporation | Transformer iron core |
| RU2724649C1 (en) * | 2017-03-30 | 2020-06-25 | ДжФЕ СТИЛ КОРПОРЕЙШН | Transformer core |
| WO2019189859A1 (en) | 2018-03-30 | 2019-10-03 | Ｊｆｅスチール株式会社 | Iron core for transformer |
| KR20200125705A (en) | 2018-03-30 | 2020-11-04 | 제이에프이 스틸 가부시키가이샤 | Iron core for transformer |
| RU2744690C1 (en) * | 2018-03-30 | 2021-03-15 | ДжФЕ СТИЛ КОРПОРЕЙШН | Iron core of transformer |
| KR20200125706A (en) | 2018-03-30 | 2020-11-04 | 제이에프이 스틸 가부시키가이샤 | Iron core for transformer |
| WO2019189857A1 (en) | 2018-03-30 | 2019-10-03 | Ｊｆｅスチール株式会社 | Iron core for transformer |
| US11961647B2 (en) | 2018-03-30 | 2024-04-16 | Jfe Steel Corporation | Iron core for transformer |
| US11961659B2 (en) | 2018-03-30 | 2024-04-16 | Jfe Steel Corporation | Iron core for transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3799252B2 (en) | 2006-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI744743B (en) | Laminated iron core and rotating electric machine | |
| TWI717154B (en) | Laminated iron core and rotating electric machine | |
| JP7207429B2 (en) | Adhesive laminated core, manufacturing method thereof, and rotary electric machine | |
| JP7311791B2 (en) | Laminated core and rotating electric machine | |
| US11915860B2 (en) | Laminated core and electric motor | |
| JP2001527375A (en) | Internal damping stator, rotor and transformer, and manufacturing method | |
| WO2020129936A1 (en) | Stacked core and rotary electric machine | |
| KR20210083337A (en) | Adhesive laminated cores for stators and rotating electric machines | |
| KR20210087069A (en) | Adhesive laminated cores for stators and rotating electric machines | |
| CN113228479A (en) | Bonded laminated core for stator, method for manufacturing same, and rotating electrical machine | |
| JPWO2020129942A1 (en) | Laminated core and rotary electric machine | |
| JP2004088970A (en) | Stacked iron core and rotating electric machine and transformer using the same | |
| KR20210088643A (en) | Laminated Core and Rotating Electric Machines | |
| JP2003077747A (en) | Method of manufacturing noise suppressing laminated core and noise suppressing structure electromagnetic steel plate | |
| JP2002151335A (en) | Laminated iron core having superior iron loss characteristics, and its manufacturing method | |
| CN110326068B (en) | Transformer core | |
| KR102493101B1 (en) | Electrical Steel, Laminated Cores and Rotating Electrical Appliances | |
| CN112005465A (en) | Electric motor with skewed stator and/or rotor comprising at least one layer of composite material | |
| JP2003282330A (en) | Adhesive-fixed laminated iron core and its manufacturing method | |
| JP2006013294A (en) | Reactor | |
| JP2003163121A (en) | Low noise transformer and reactor | |
| JP7515403B2 (en) | Adhesive laminated core for stator, manufacturing method thereof, and rotating electric machine | |
| US20220209592A1 (en) | Core block, laminated core, and electric motor | |
| JPH09320860A (en) | Magnetic shield device | |
| JPH08107022A (en) | Lamination core and wound core of low noise wherein high silicon steel plate is used |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050628 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050809 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050929 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060411 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060424 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 3799252 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110428 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120428 Year of fee payment: 6 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130428 Year of fee payment: 7 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130428 Year of fee payment: 7 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130428 Year of fee payment: 7 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130428 Year of fee payment: 7 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130428 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140428 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |