JPH01241104A - Attractive electromagnet - Google Patents
Attractive electromagnetInfo
- Publication number
- JPH01241104A JPH01241104A JP6910788A JP6910788A JPH01241104A JP H01241104 A JPH01241104 A JP H01241104A JP 6910788 A JP6910788 A JP 6910788A JP 6910788 A JP6910788 A JP 6910788A JP H01241104 A JPH01241104 A JP H01241104A
- Authority
- JP
- Japan
- Prior art keywords
- armature
- yoke
- attractive
- force
- electromagnet
- 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.)
- Pending
Links
- 238000001179 sorption measurement Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 abstract description 13
- 230000004907 flux Effects 0.000 abstract description 6
- 239000000696 magnetic material Substances 0.000 abstract description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Electromagnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔分野の概要〕
本発明は、原子炉に使用される安全装置を接続する吸着
電磁石に係り、特に、ヨークに吸着された、安全装置を
接続するアーマチュアを、電磁吸着力を解放時、速やか
にヨークから解放するのに好都合な吸着電磁石の構造に
関するものである。[Detailed Description of the Invention] [Overview of the Field] The present invention relates to an adsorption electromagnet for connecting a safety device used in a nuclear reactor. This invention relates to a structure of an adsorption electromagnet that is convenient for quickly releasing force from a yoke when the force is released.
従来この種の吸着電磁石は第２図に示すように、コイル
を内部に有するヨーク１と、吸着されるアーマチュア２
が吸着面を介して接触しているが、高い吸着力を得るた
めにヨークとアーマチュアが接する吸着面を平坦にし、
吸着面に生じる空隙によりコイルの起磁力によって発生
するヨークとアーマチュア内の磁束の減少を最小にし、
かつ吸着力のばらつきをおさえる構造としていた。この
ような構造は吸着力は高くなるが、吸着力の解放時に材
料の残留磁束が高くなり、残留吸着力が大きく解放時間
が長くなるという欠点を有していた。Conventionally, this type of attracting electromagnet consists of a yoke 1 having a coil inside and an armature 2 to be attracted, as shown in FIG.
are in contact through the suction surface, but in order to obtain high suction force, the suction surface where the yoke and armature contact is made flat.
The air gap created on the attraction surface minimizes the decrease in magnetic flux within the yoke and armature caused by the magnetomotive force of the coil.
It also has a structure that suppresses variations in adsorption power. Although such a structure has a high adsorption force, it has the disadvantage that the residual magnetic flux of the material increases when the adsorption force is released, and the residual adsorption force is large and the release time becomes long.
また、この欠点を除去するため、特に吸着力解放時間を
短くするためにヨークとアーマチュアの材料を保持力（
Ｈｃ）の小さな高価な材質、例えば７８％ＮｉＦｅ合金
を用いるなどの対策がおこなわれているが、保持力の小
さな材料は一般に鉄系材料に比べて飽和磁束密度（Ｂｓ
）が低くなり最大吸着力も低下するなどの問題があった
。In order to eliminate this drawback, we have also modified the material of the yoke and armature with a holding force (
Measures have been taken to use expensive materials with a low coercive force (Bs
) and the maximum adsorption force also decreased.
従って、抗磁力の小さな磁性材料を使用するときは電磁
石は大型となり高価なものとなる欠点があった。Therefore, when a magnetic material with a small coercive force is used, the electromagnet becomes large and expensive.
本発明はこれらの欠点を除去するためなされたもので、
ヨークに吸着されたアーマチュアが規定の電流値のとき
は必要な吸着力を保持し、保持電流を解放したときには
短時間に解放されるよう安価な吸着電磁石を提供するこ
とを目的としたものである。The present invention was made to eliminate these drawbacks.
The purpose of this invention is to provide an inexpensive attracting electromagnet that maintains the necessary attracting force when the armature attracted to the yoke has a specified current value, and is released in a short time when the holding current is released. .
本発明は、ヨークに吸着されるアーマチュアのヨークと
対面する吸着面の内径側に、０．１ないし０、５ｍｍの
微少空隙を設け、アーマチュア外周にリング状にヨーク
との密着面を設けるよう構成したもので、ヨーク側のコ
イル電流を切り吸着力を解放した時（コイル電流停止時
）、ヨークからアーマチュアが速やかに解放されるよう
構成したことを特徴とする。The present invention is configured such that a minute gap of 0.1 to 0.5 mm is provided on the inner diameter side of the suction surface facing the yoke of the armature that is suctioned to the yoke, and a ring-shaped contact surface with the yoke is provided on the outer periphery of the armature. The armature is characterized by being configured so that when the coil current on the yoke side is cut off and the attraction force is released (when the coil current is stopped), the armature is quickly released from the yoke.
即ち本発明は内部に電磁吸着力を発生させるコイルを収
納したヨークと、該ヨークと吸着面を有するアーマチュ
アからなる吸着電磁石において、アーマチュアまたはヨ
ークの吸着面に、外径と同心円状に内面をくり抜いて微
少空隙を設けたことを特徴とする吸着電磁石。That is, the present invention provides an attraction electromagnet consisting of a yoke that houses a coil that generates an electromagnetic attraction force inside, and an armature that has an attraction surface for the yoke. An adsorption electromagnet characterized by having micro-gaps formed therein.
本発明の内容を実施例に基づき説明する。 The content of the present invention will be explained based on examples.
第２図は従来型吸着電磁石の一例の断面図である。コイ
ル３に通電するとヨーク１とアーマチュアとの吸着面４
は電磁力により密着しまた従来型吸着電磁石では吸着面
のヨークとアーマチュアには空隙部分は設けられていな
い。FIG. 2 is a sectional view of an example of a conventional attracting electromagnet. When the coil 3 is energized, the attraction surface 4 between the yoke 1 and the armature
are in close contact with each other due to electromagnetic force, and in conventional attracting electromagnets, there is no gap between the yoke and armature of the attracting surface.
第１図は本発明の吸着電磁石の一例を示す断面図である
。コイルに通電するとヨーク１とアーマチュアとの吸着
面は電磁力が作用し吸着する。第１図において、ヨーク
とアーマチュアとの吸着面は外径がヨークとアーマチュ
ア共９０ｍｍφであり、使用磁性材料は飽和磁束密度（
Ｂｓ）が高く保持力（Ｈｅ）の低い５０％ＮｉＦｅ合金
を使用しており、吸着面のアーマチュア内径部には外径
に同心円状の径が７２ｍｍで、０．１ｍｍないし０．５
ｍｍの空隙を設けている。FIG. 1 is a sectional view showing an example of the attraction electromagnet of the present invention. When the coil is energized, electromagnetic force acts on the attraction surfaces of the yoke 1 and the armature, causing them to attract each other. In Fig. 1, the outer diameter of the attraction surface between the yoke and the armature is 90 mmφ, and the magnetic material used has a saturation magnetic flux density (
A 50% NiFe alloy with high Bs) and low holding force (He) is used, and the inner diameter of the armature on the suction surface has a diameter of 72 mm concentric with the outer diameter, and a diameter of 0.1 mm to 0.5 mm.
A gap of mm is provided.
このような構造とすることによりヨーク側のコイル電流
を切ったとき、電流をきってから吸着面からアーマチュ
アが離れるまでの時間は、第２図に示す従来構造では１
００ｍ５ｅｃであったのに対し、第１図に示す本発明の
構造とすることにより、５０ｍ５ｅｃ以下とすることが
出来た。一方、吸着力は前記吸着面寸法とするときコイ
ル電流が０．４ｍＡのとき５０Ｋｇ、 ０．６ｍＡのと
き１００Ｋｇを保証することができ、目的とする特性が
確保された。この時のコイル電流と吸着力の関係を第３
図に示す。１１は従来型吸着電磁石、１２はヨーク及び
アーマチュア材料に保持力の小さい材質を使用した従来
型吸着電磁石、１３は本発明による吸着磁石の特性を示
す。コイル電流を０としたときの空隙を含む見かけ上の
磁束密度は、従来型〉低Ｈｅ材料型〉本発明となり、従
って残留吸着力は従来型〉低Ｈｅ材料型〉本発明となる
ことを示す。With this structure, when the coil current on the yoke side is cut off, the time from when the current is cut until the armature separates from the attraction surface is reduced to 1 in the conventional structure shown in Figure 2.
00m5ec, but by using the structure of the present invention shown in FIG. 1, it was possible to reduce it to 50m5ec or less. On the other hand, with the above-mentioned attraction surface dimensions, the attraction force could be guaranteed to be 50 kg when the coil current was 0.4 mA and 100 kg when the coil current was 0.6 mA, and the desired characteristics were ensured. The relationship between the coil current and the adsorption force at this time is expressed as
As shown in the figure. Reference numeral 11 indicates a conventional attracting electromagnet, 12 indicates a conventional attracting electromagnet using materials with low holding force for the yoke and armature materials, and 13 indicates characteristics of an attracting magnet according to the present invention. This shows that the apparent magnetic flux density including the air gap when the coil current is 0 is the conventional type > low He material type > the present invention, and the residual adsorption force is the conventional type > low He material type > the present invention. .
本発明において、ヨークのコイル電流を切った後アーマ
チュアがヨーク面を離れるまでの時間は、アーマチュア
の内側に同心円状に設けた空隙の大きさと、空隙の深さ
が深いほど短くなるが、一方、ヨークとアーマチュアと
の吸着力は、同じコイル電流の値でも空隙を設けるとき
はその値が低（なることから、本発明の目的に対しては
アーマチュアに設ける空隙は、アーマチュア内面に外径
に対し同心円に面積比で０．５ないし０．８．空隙の深
さは０、１ｍｍないし０．５ｍｍの間で組合せ用いると
き目的とする特性が得られた。In the present invention, the time it takes for the armature to leave the yoke surface after the yoke coil current is cut off becomes shorter as the size of the gap provided concentrically inside the armature and the depth of the gap become deeper. The attraction force between the yoke and the armature is lower when a gap is provided even if the coil current is the same. Therefore, for the purpose of the present invention, the gap provided in the armature is The desired characteristics were obtained when the concentric circles were used in combination with an area ratio of 0.5 to 0.8 and a void depth of 0.1 mm to 0.5 mm.
尚、本発明ではアーマチュア側に空隙を設けた例で説明
したが、ヨーク側吸着面にはヨーク外径に同心円状の吸
着面内側にくり抜いた空隙を設けた構造としても本発明
の実施例と同様な特性が得られることは当然である。Although the present invention has been explained using an example in which a gap is provided on the armature side, the embodiment of the present invention may also have a structure in which a gap is hollowed out on the inside of the suction surface in a concentric circle around the outer diameter of the yoke on the yoke side suction surface. Naturally, similar characteristics can be obtained.
以上説明したように本発明による微少空隙を有する吸着
磁石は残留吸着力が小さくなり、高価な材料を使用する
ことなくアーマチュア解放時間を短くするという優れた
効果がある。As explained above, the attracting magnet having minute voids according to the present invention has a small residual attracting force, and has the excellent effect of shortening the armature release time without using expensive materials.
本発明は原子炉制御棒吸着用等、瞬時に物体を落下させ
る目的で使用する吸着電磁石に応用できる。The present invention can be applied to an adsorption electromagnet used for the purpose of instantly dropping objects, such as for adsorption of nuclear reactor control rods.
第１図は、本発明による吸着電磁石の縦断面図で、（ａ
）はヨーク、（ｂ）はアーマチュア。
第２図は、従来構造の吸着電磁石の縦断面図で、（ａ）
はヨーク、（ｂ）はアーマチュア。
第３図は、各種の材料を用いたときの吸着電磁石のコイ
ル電流と吸着力との関係を示す図で、（ｄ）は従来構造
の吸着電磁石、（ｅ）は保持力（Ｈｅ）が小さく飽和磁
束密度も低い材料を使用した吸着電磁石、（ｆ）は本発
明による吸着電磁石。
１・・・ヨーク、２．５・・・アーマチュア。
３・・・励磁コイル。４・・・吸着面。１０・・・空隙
。
１１・・・従来型吸着電磁石。
１２・・・ヨーク及びアーマチュア材料に保持力の小さ
い材料を使用し従来型吸着電磁石。
１３・・・本発明による吸着電磁石。
以下余白
第１図FIG.
) is the yoke, (b) is the armature. Fig. 2 is a vertical cross-sectional view of an adsorption electromagnet with a conventional structure, and (a)
is the yoke, and (b) is the armature. Figure 3 is a diagram showing the relationship between the coil current and adsorption force of the adsorption electromagnet when using various materials, (d) is an adsorption electromagnet with a conventional structure, and (e) is a small holding force (He). An adsorption electromagnet using a material with a low saturation magnetic flux density, (f) is an adsorption electromagnet according to the present invention. 1... Yoke, 2.5... Armature. 3... Excitation coil. 4...Adsorption surface. 10...Void. 11... Conventional adsorption electromagnet. 12... Conventional adsorption electromagnet using materials with low holding force for the yoke and armature materials. 13...Adsorption electromagnet according to the present invention. Figure 1 in the margin below
Claims (1)
と、該ヨークと吸着面を有するアーマチュアからなる吸
着電磁石において、アーマチュアまたはヨークの吸着面
に、外径と同心円状に内面をくり抜いて微少空隙を設け
たことを特徴とする吸着電磁石。In an adsorption electromagnet consisting of a yoke that houses a coil that generates an electromagnetic adsorption force inside, and an armature that has an adsorption surface for the yoke, the inner surface of the armature or the yoke is hollowed out concentrically with the outer diameter to form a minute gap. An adsorption electromagnet characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6910788A JPH01241104A (en) | 1988-03-22 | 1988-03-22 | Attractive electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6910788A JPH01241104A (en) | 1988-03-22 | 1988-03-22 | Attractive electromagnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01241104A true JPH01241104A (en) | 1989-09-26 |
Family
ID=13393074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6910788A Pending JPH01241104A (en) | 1988-03-22 | 1988-03-22 | Attractive electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01241104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025062A1 (en) * | 1996-12-01 | 1998-06-11 | Fujikin Inc. | Fluid control valve and fluid supply/exhaust system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827909B2 (en) * | 1978-06-16 | 1983-06-13 | 株式会社日立製作所 | Coil gradient magnetic bubble memory module |
| JPS5846412B2 (en) * | 1974-11-28 | 1983-10-17 | エア− インダストリ− | Funmatsuzairiyounonagarebunkatsusouchi |
-
1988
- 1988-03-22 JP JP6910788A patent/JPH01241104A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846412B2 (en) * | 1974-11-28 | 1983-10-17 | エア− インダストリ− | Funmatsuzairiyounonagarebunkatsusouchi |
| JPS5827909B2 (en) * | 1978-06-16 | 1983-06-13 | 株式会社日立製作所 | Coil gradient magnetic bubble memory module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025062A1 (en) * | 1996-12-01 | 1998-06-11 | Fujikin Inc. | Fluid control valve and fluid supply/exhaust system |
| US6193212B1 (en) | 1996-12-01 | 2001-02-27 | Tadahiro Ohmi | Fluid control valve and fluid supply/exhaust system |
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