JPH10208947A - Iron core with gap for reactor - Google Patents
Iron core with gap for reactorInfo
- Publication number
- JPH10208947A JPH10208947A JP9041361A JP4136197A JPH10208947A JP H10208947 A JPH10208947 A JP H10208947A JP 9041361 A JP9041361 A JP 9041361A JP 4136197 A JP4136197 A JP 4136197A JP H10208947 A JPH10208947 A JP H10208947A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- core
- silicon steel
- iron core
- reactor
- 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
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- Regulation Of General Use Transformers (AREA)
Abstract
(57)【要約】
【課題】 軸方向鉄心締付力によって発生する磁歪の増
加を抑制し、これにより騒音の低減の図れるリアクトル
用ギャップ付鉄心を提供すること。
【解決手段】 方向性ケイ素鋼板を積層してブロック鉄
心２およびヨーク鉄心４、５を形成し、ブロック鉄心２
間にギャップ用の非磁性絶縁体３を挟んで脚鉄心１を形
成したリアクトル用ギャップ付鉄心において、前記方向
性ケイ素鋼板としてギャップにより発生する磁気吸引力
に１５Ｋｇ／ｃｍ２を加算した張力以上の内部張力を備
えてなる方向性ケイ素鋼板を用い、鉄心を締め付けたと
きの方向性ケイ素鋼板の軸方向にかかる圧縮力の作用を
低減して磁歪の急増をなくする。
(57) [Problem] To provide a reactor core with a gap which suppresses an increase in magnetostriction generated by an axial core tightening force and thereby reduces noise. A block core 2 and yoke cores 4 and 5 are formed by laminating grain-oriented silicon steel sheets.
In a reactor core with a gap, in which a leg iron core 1 is formed with a gap non-magnetic insulator 3 interposed therebetween, a tension equal to or greater than a magnetic attractive force generated by the gap as a result of the addition of 15 kg / cm 2 as the directional silicon steel plate. A directional silicon steel sheet having an internal tension is used, and the action of a compressive force applied in the axial direction of the directional silicon steel sheet when the iron core is tightened is reduced to prevent a sudden increase in magnetostriction.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リアクトル用ギャ
ップ付鉄心に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core with a gap for a reactor.
【０００２】[0002]
【従来の技術】図１は、分路リアクトルに代表されるギ
ャップ付の鉄心式リアクトルの鉄心構体の一例の概略正
面図で、１は脚鉄心、４は上部ヨーク鉄心、５は下部ヨ
ーク鉄心、６及び７は締付金具、８は締付スタッドであ
る。脚鉄心１は、方向性ケイ素鋼板を積層して構成され
るブロック鉄心２と、各ブロック鉄心２の間に挿入され
るギャップ用の非磁性絶縁体３とを交互に積み重ねて柱
状に構成される。2. Description of the Related Art FIG. 1 is a schematic front view of an example of a core structure of a core type reactor with a gap, represented by a shunt reactor, wherein 1 is a leg core, 4 is an upper yoke core, 5 is a lower yoke core, Reference numerals 6 and 7 denote fastening fittings, and reference numeral 8 denotes a fastening stud. The leg iron core 1 is formed in a columnar shape by alternately stacking a block iron core 2 formed by laminating directional silicon steel plates and a non-magnetic insulator 3 for a gap inserted between the block iron cores 2. .
【０００３】そして、鉄心構体は、脚鉄心１を、上部ヨ
ーク鉄心４の上面及び下部ヨーク鉄心５の下面に、締付
金具６、７をあてがい、両締付金具６、７にまたがって
その両端部に締付スタッド８を挿通し、これにナット９
を締め付けることにより、上下締付金具６、７間に締付
力を発生させ、これを上下ヨーク鉄心４、５を介して脚
鉄心１に伝達させている。[0003] In the iron core structure, fastening irons 6 and 7 are applied to the leg iron core 1 on the upper surface of the upper yoke iron core 4 and the lower surface of the lower yoke iron core 5. Insert the tightening stud 8 through the nut and insert the nut 9
, A tightening force is generated between the upper and lower fasteners 6 and 7 and transmitted to the leg core 1 via the upper and lower yoke cores 4 and 5.
【０００４】このように構成された鉄心構体では、ギャ
ップ３があるためブロック鉄心２間に、Ｆ＝Ｂｍ２×１
０−４／２×μ０×９．８（Ｋｇ／ｃｍ２）の磁気吸引
力Ｆ、例えば磁束密度Ｂｍを１．５Ｔ（テスラ）とする
と、１．５２×１０−４／２×４π×１０−７×９．８
＝９．１（Ｋｇ／ｃｍ２）の磁気吸引力Ｆが働く。その
ためこの磁気吸引力で脚鉄心１が緩まないように、この
力以上のいわゆる軸方向鉄心締付力と称される力で脚鉄
心１は上下ヨーク鉄心４、５により締め付けられてい
る。[0004] In the iron core structure thus configured, since there is a gap 3, F = Bm 2 × 1 between the block iron cores 2.
Assuming that the magnetic attraction force F of 0 −4 / 2 × μ 0 × 9.8 (Kg / cm 2 ), for example, the magnetic flux density Bm is 1.5 T (tesla), 1.5 2 × 10 −4 / 2 × 4π. × 10 −7 × 9.8
= 9.1 (Kg / cm 2 ). For this reason, the leg core 1 is tightened by the upper and lower yoke cores 4 and 5 with a force that is greater than this force and is called a so-called axial core tightening force so that the leg core 1 is not loosened by the magnetic attraction force.
【０００５】すなわち、鉄心は磁束の流れから磁気抵抗
の少ない方向性ケイ素鋼板のロール方向（圧延方向）を
その軸方向とされているので、この軸方向鉄心締付力
は、ケイ素鋼板のロール方向の圧縮力として加えられる
ことになる。That is, since the core has its axial direction set in the roll direction (rolling direction) of the directional silicon steel sheet having low magnetic resistance from the flow of magnetic flux, the axial core clamping force is determined by the roll direction of the silicon steel sheet. Will be applied as a compression force.
【０００６】[0006]
【発明が解決しようとする課題】ところで、ギャップ付
の鉄心式リアクトルは騒音が比較的に大きいと云う問題
があり、この騒音を低減することが望まれている。この
騒音の発生要因の１つにケイ素鋼板の磁歪現象がある。
磁歪とはケイ素鋼板に磁束を流すとケイ素鋼板がが伸縮
する現象で、この磁歪と方向性ケイ素鋼板に加えられる
力との間には、図２に示すような関係、すなわち方向性
ケイ素鋼板に張力が加えられていると磁歪が小さく、ま
た張力の増大に対して磁歪の変化も小さいが、張力が１
５Ｋｇ／ｃｍ２以下になると磁歪が増大し、方向性ケイ
素鋼板に加えられる力の向きが変わり圧縮力の領域にな
ると磁歪が急増するという関係がある。そのため、リア
クトルの騒音が大きいのは軸方向鉄心締付力によって磁
歪が増加していることが要因の１つと考えられる。The iron core reactor with a gap has a problem that the noise is relatively large, and it is desired to reduce the noise. One of the causes of the noise is a magnetostriction phenomenon of a silicon steel sheet.
Magnetostriction is a phenomenon in which a silicon steel sheet expands and contracts when a magnetic flux flows through the silicon steel sheet. The relationship between this magnetostriction and the force applied to the directional silicon steel sheet is as shown in FIG. The magnetostriction is small when tension is applied, and the change in magnetostriction is small with an increase in tension.
When the pressure is 5 kg / cm 2 or less, the magnetostriction increases, and the direction of the force applied to the grain-oriented silicon steel sheet changes. For this reason, it is considered that one of the factors that the reactor noise is large is that the magnetostriction is increased due to the axial core tightening force.
【０００７】本発明は、このような実情に鑑みなされた
もので、軸方向鉄心締付力によって発生する磁歪の増加
を抑制し、これにより騒音の低減の図れるリアクトル用
ギャップ付鉄心を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a reactor core with a gap, which suppresses an increase in magnetostriction caused by an axial core clamping force, thereby reducing noise. With the goal.
【０００８】[0008]
【課題を解決するための手段】本発明の目的は、方向性
ケイ素鋼板が積層され、磁路中にギャップを有するリア
クトル用ギャップ付鉄心において、前記方向性ケイ素鋼
板としてギャップにより発生する磁気吸引力に１５Ｋｇ
／ｃｍ２を加算した張力以上の内部張力を備えてなる方
向性ケイ素鋼板を用いてなることを特徴とすることによ
って達成される。SUMMARY OF THE INVENTION It is an object of the present invention to provide a reactor with a gap having a gap in a magnetic path, in which a directional silicon steel sheet is laminated and a magnetic attractive force generated by the gap as the directional silicon steel sheet. 15kg
This is achieved by using a directional silicon steel sheet having an internal tension equal to or higher than the tension obtained by adding / cm 2 .
【０００９】本発明の特徴によれば、鉄心構体に組まれ
たときに発生する磁気吸引力に１５Ｋｇ／ｃｍ２を加算
した張力以上の内部張力を持たせて形成された方向性ケ
イ素鋼板が用いられるので、磁気吸引力で緩まないよう
に締め付けても、方向性ケイ素鋼板はほぼ１５Ｋｇ／ｃ
ｍ２の張力が維持されて磁歪は小さく、この磁歪により
発生する騒音は低減される。According to a feature of the present invention, a directional silicon steel sheet formed by giving an internal tension equal to or greater than a tension obtained by adding 15 kg / cm 2 to a magnetic attraction force generated when assembled in an iron core structure is used. Therefore, even if it is tightened so that it is not loosened by the magnetic attraction force, the grain-oriented silicon steel sheet is almost 15 kg / c.
The tension of m 2 is maintained and the magnetostriction is small, and the noise generated by this magnetostriction is reduced.
【００１０】[0010]
【発明の実施の形態】本発明に係るリアクトル用ギャッ
プ付鉄心の実施の形態について説明する。なお、リアク
トル用ギャップ付鉄心の鉄心構体は図１に示して説明し
た鉄心構体と同様に構成されるのでその説明は省略す
る。この実施の形態に係る鉄心は、厚さ０．２３ｍｍの
方向性ケイ素鋼板の表面にセラミックコーティングを施
し、このセラミックコーティングにより鉄心構体に組ま
れたときに発生する磁気吸引力に１５Ｋｇ／ｃｍ２を加
算した張力以上の内部張力を持たせて形成された方向性
ケイ素鋼板を積層して構成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a reactor core with a gap according to the present invention will be described. The core structure of the reactor core with a gap is configured in the same manner as the core structure shown and described in FIG. The iron core according to the present embodiment has a surface of a grain-oriented silicon steel sheet having a thickness of 0.23 mm coated with a ceramic coating, and 15 Kg / cm 2 is applied to a magnetic attraction force generated when the core is assembled by the ceramic coating. It is configured by laminating directional silicon steel sheets formed with an internal tension equal to or higher than the added tension.
【００１１】このように構成された鉄心で、鉄心重量４
５Ｋｇのモデルリアクトルを従来と同様の鉄心の軸方向
締付け力で締め付けて製作し、５０Ｈｚ、１．９Ｔ（テ
スラ）で騒音試験を行った。その時の騒音測定結果は４
４．１ｄｂである。同様に従来の鉄心重量４５Ｋｇのリ
アクトルを、５０Ｈｚ、１．９Ｔ（テスラ）で騒音試験
を行った。その時の騒音測定結果は５０．０ｄｂであっ
た。[0011] With the iron core thus configured, the iron core weight 4
A model reactor of 5 kg was tightened with the same axial tightening force of the iron core as before, and a noise test was performed at 50 Hz and 1.9 T (tesla). The noise measurement result at that time was 4
4.1 db. Similarly, a noise test was performed on a conventional reactor having a core weight of 45 kg at 50 Hz and 1.9 T (tesla). The noise measurement result at that time was 50.0 db.
【００１２】両者のリアクトルの騒音測定結果から明ら
かなように、この実施の形態のリアクトルでは、従来の
リアクトルよりも５．９ｄｂ低い騒音となっている。な
お、５．９ｄｂ差は磁歪に換算すると０．２６倍（１０
−０．５９＝０．２６倍）であり、約４分の１に減少し
ている。As is clear from the noise measurement results of both reactors, the reactor of this embodiment has a noise of 5.9 db lower than that of the conventional reactor. Note that the 5.9 db difference is 0.26 times (10
-0.59 = 0.26 times), which is a reduction of about one fourth.
【００１３】[0013]
【発明の効果】以上説明したように本発明によれば、鉄
心を締め付けたとしても磁歪の急増はなく、したがって
低騒音のリアクトルを提供することができる。As described above, according to the present invention, even if the iron core is tightened, there is no sudden increase in magnetostriction, and therefore a low-noise reactor can be provided.
【図１】ギャップ付の鉄心式リアクトルの鉄心構体の一
例の概略正面図である。FIG. 1 is a schematic front view of an example of an iron core structure of an iron core reactor with a gap.
【図２】方向性ケイ素鋼板の力と磁歪の関係を示す特性
図である。FIG. 2 is a characteristic diagram showing a relationship between force and magnetostriction of a grain-oriented silicon steel sheet.
１ 脚鉄心 ２ ブロック鉄心 ３ ギャップ用の非磁性絶縁体 ４ 上部ヨーク鉄心 ５ 下部ヨーク鉄心 ６、７ 締付金具 ８ 締付スタッド ９ ナット DESCRIPTION OF SYMBOLS 1 Leg iron core 2 Block iron core 3 Non-magnetic insulator for gap 4 Upper yoke iron core 5 Lower yoke iron core 6, 7 Tightening bracket 8 Tightening stud 9 Nut
Claims (1)
ギャップを有するリアクトル用ギャップ付鉄心におい
て、前記方向性ケイ素鋼板としてギャップにより発生す
る磁気吸引力に１５Ｋｇ／ｃｍ２を加算した張力以上の
内部張力を備えてなる方向性ケイ素鋼板を用いてなるこ
とを特徴とするリアクトル用ギャップ付鉄心。A directional silicon steel sheet is laminated, and in a reactor core with a gap having a gap in a magnetic path, a tension equal to or greater than a magnetic attractive force generated by the gap plus 15 kg / cm 2 as the directional silicon steel sheet. A gapped iron core for a reactor, characterized by using a grain-oriented silicon steel sheet having an internal tension as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04136197A JP3823418B2 (en) | 1997-01-20 | 1997-01-20 | Core with gap for reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04136197A JP3823418B2 (en) | 1997-01-20 | 1997-01-20 | Core with gap for reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10208947A true JPH10208947A (en) | 1998-08-07 |
| JP3823418B2 JP3823418B2 (en) | 2006-09-20 |
Family
ID=12606347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04136197A Expired - Fee Related JP3823418B2 (en) | 1997-01-20 | 1997-01-20 | Core with gap for reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3823418B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118623A (en) * | 2015-08-21 | 2015-12-02 | 昆山市特种变压器制造有限公司 | Iron core electric reactor of inner pull plate clamping structure |
| JP2023088364A (en) * | 2021-12-15 | 2023-06-27 | 日本製鉄株式会社 | reactor core |
-
1997
- 1997-01-20 JP JP04136197A patent/JP3823418B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118623A (en) * | 2015-08-21 | 2015-12-02 | 昆山市特种变压器制造有限公司 | Iron core electric reactor of inner pull plate clamping structure |
| JP2023088364A (en) * | 2021-12-15 | 2023-06-27 | 日本製鉄株式会社 | reactor core |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3823418B2 (en) | 2006-09-20 |
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