JPH1186641A - Cable - Google Patents
CableInfo
- Publication number
- JPH1186641A JPH1186641A JP24567497A JP24567497A JPH1186641A JP H1186641 A JPH1186641 A JP H1186641A JP 24567497 A JP24567497 A JP 24567497A JP 24567497 A JP24567497 A JP 24567497A JP H1186641 A JPH1186641 A JP H1186641A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- resin
- magnetic
- cable
- conductor
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気機器の電力供
給あるいは電気的接続に用いられる配線用等として使用
されるケーブルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable used for wiring or the like used for power supply or electrical connection of electric equipment.
【０００２】[0002]
【従来の技術】近年電子機器が高度化し、かつ多数用い
られるようになったために、漏れ磁界や電磁雑音等によ
る機器の誤動作が問題となっている。電気機器を接続す
るケーブルにおいてもその内部を流れる電流によって発
生する漏れ磁界等により、周辺機器の誤動作を引き起こ
す原因となることがある。これに対し、樹脂シートの間
に軟磁性粉末を均一に分散させて作製したシート材をケ
ーブルの外周に巻き付けることで、磁気シールド効果が
得られることが特開平８−３１２３７号で示されてい
る。2. Description of the Related Art In recent years, as electronic devices have become more sophisticated and have been used in large numbers, malfunctions of the devices due to leakage magnetic fields, electromagnetic noise, and the like have become a problem. Even in a cable connecting an electric device, a leakage magnetic field or the like generated by a current flowing through the cable may cause a malfunction of a peripheral device. On the other hand, JP-A-8-31237 discloses that a magnetic shield effect can be obtained by winding a sheet material prepared by uniformly dispersing soft magnetic powder between resin sheets around a cable. .
【０００３】[0003]
【発明が解決しようとする課題】上述したケーブルの外
周にシールド材を巻き付ける方法は、巻装後両端を閉じ
あわせるため、接合部が存在する。従ってケーブルに近
接した電子機器に対する接合部からの漏洩磁界の影響が
懸念される。また、本発明者の検討によれば、パーマロ
イあるいは純鉄の粉末では十分な磁気シールド効果が得
られないという問題が生じた。そこで磁気特性に優れる
Ｃｏ系のアモルファス合金の粉末を用いた。その結果、
上記素材に比べ磁気シールド効果は改善されたが、経時
変化が大きく、長期の使用に問題があることが判明し
た。本発明の目的は上述した問題点を解決するために、
磁気シールド効果を十分に発揮できる新しい構成のケー
ブルを提供することである。In the above-described method of winding the shield material around the outer periphery of the cable, a joint exists because both ends are closed after winding. Therefore, there is a concern about the influence of the leakage magnetic field from the joint on the electronic device close to the cable. Further, according to the study of the present inventors, there has been a problem that a permalloy or a powder of pure iron cannot provide a sufficient magnetic shielding effect. Therefore, powder of a Co-based amorphous alloy having excellent magnetic properties was used. as a result,
Although the magnetic shielding effect was improved as compared with the above materials, the change with time was large, and it was found that there was a problem in long-term use. The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a cable having a new configuration capable of sufficiently exhibiting a magnetic shielding effect.
【０００４】[0004]
【課題を解決するための手段】本発明者は上記問題点を
検討し、パーマロイや純鉄よりも、磁性体としての磁気
特性に優れ、Ｃｏ系アモルファス合金よりも経時変化の
少ないナノ結晶磁性体の粉末と樹脂を混合し、継ぎ目の
ないチューブ状に成形したものを導体に被覆すること
で、十分な磁気シールド効果が得られ経時変化も少ない
ことを見出し、本発明に到達した。Means for Solving the Problems The present inventor has studied the above problems and has found that a nanocrystalline magnetic material which has better magnetic properties as a magnetic material than permalloy or pure iron and has less change with time than a Co-based amorphous alloy. The present inventors have found that a sufficient magnetic shielding effect can be obtained and a change with time is small by coating the conductor with a seamless tube formed by mixing the powder and the resin, and reaching the present invention.
【０００５】すなわち本発明は、導体とそれを被覆する
樹脂を有するケーブルであって、前記樹脂内部にはナノ
結晶磁性粉末が分散していることを特徴とするケーブル
である。また本発明において、磁性粉末は樹脂の重量の
１５倍以下であり、その粒径は５００μｍ以下であるこ
とが好ましい。That is, the present invention relates to a cable having a conductor and a resin covering the conductor, wherein the nanocrystalline magnetic powder is dispersed in the resin. In the present invention, the magnetic powder is not more than 15 times the weight of the resin, and the particle diameter is preferably not more than 500 μm.
【０００６】[0006]
【発明の実施の形態】上述したように、本発明の重要な
特徴はナノ結晶磁性粉末を樹脂と混合し、チューブ状に
成形したものを導体に被覆したことにある。樹脂に混合
する磁性粉末として、パーマロイあるいはアモルファス
合金よりも磁気特性に優れるナノ結晶磁性材料を適用す
ることは、磁気シールドとしてより漏洩磁束が少なくな
るという点で有利である。また導体に被覆する樹脂をチ
ューブ状に成形することは、前述したようなシート状の
シールド材をケーブルに巻き、両端を接合するという工
程が省略できるという点でも有効である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, an important feature of the present invention resides in that a nanocrystalline magnetic powder is mixed with a resin and formed into a tube and coated with a conductor. Applying a nanocrystalline magnetic material having better magnetic properties than permalloy or an amorphous alloy as the magnetic powder to be mixed with the resin is advantageous in that the leakage magnetic flux is reduced as a magnetic shield. Forming the resin for covering the conductor into a tube shape is also effective in that the step of winding the above-mentioned sheet-shaped shield material around a cable and joining both ends can be omitted.
【０００７】本発明において樹脂と混合するナノ結晶磁
性粉末の重量を樹脂の１５倍としたのは、１５倍以上で
は樹脂が少ないために成形性が悪くなるからである。ま
た、本発明において適用される樹脂としては、ポリエチ
レン樹脂、ポリプロピレン樹脂、ポリウレタン樹脂、塩
化ビニル樹脂などがある。In the present invention, the weight of the nanocrystalline magnetic powder to be mixed with the resin is set to 15 times that of the resin, because if it is 15 times or more, the resin is small and the moldability is deteriorated. Examples of the resin applied in the present invention include a polyethylene resin, a polypropylene resin, a polyurethane resin, and a vinyl chloride resin.
【０００８】本発明でいうナノ結晶磁性粉末というの
は、実質的に１００ｎｍ以下の微細結晶粒で構成される
粉末である。具体的には、Ｆｅ−Ｃｕ−Ｎｂ−Ｓｉ−Ｂ
系やＦｅ−Ｚｒ−Ｂ系に代表されるｂｃｃＦｅの微細結
晶からなる材料である。The nanocrystalline magnetic powder referred to in the present invention is a powder substantially composed of fine crystal grains of 100 nm or less. Specifically, Fe-Cu-Nb-Si-B
This is a material composed of fine crystals of bccFe typified by Fe-Zr-B system.
【０００９】本発明のケーブルは次のような方法で製造
することができる。まず水アトマイズ法などにより、ア
モルファス合金の粉末を作製する。次いで、結晶化温度
以上で加熱処理し微結晶化させる。ナノ結晶磁性粉末の
平均粒径が５００μｍを越えたものは、粉末製造時に均
質なアモルファスとなり難く、その後の加熱処理で結晶
化した時に優れた軟磁気特性を得にくくなる。したがっ
て、本発明では５００μｍ以上の粉末を使用することが
望ましい。このようにして得られたナノ結晶合金の粉末
と樹脂を均一に混合した後、押出成形により導体の周囲
にチューブ状に成形する。The cable of the present invention can be manufactured by the following method. First, an amorphous alloy powder is prepared by a water atomizing method or the like. Next, heat treatment is performed at a temperature higher than the crystallization temperature to microcrystallize. When the average particle diameter of the nanocrystalline magnetic powder exceeds 500 μm, it is difficult to form a homogeneous amorphous material at the time of powder production, and it is difficult to obtain excellent soft magnetic properties when crystallized by a subsequent heat treatment. Therefore, in the present invention, it is desirable to use a powder of 500 μm or more. After the powder of the nanocrystalline alloy thus obtained and the resin are uniformly mixed, the mixture is extruded and formed into a tube shape around the conductor.
【００１０】[0010]
（実施例１）水アトマイズ法により、平均粒径２０μｍ
のＣｕ1−Ｎｂ3−Ｓｉ13.5−Ｂ9（ａｔ％）、残部Ｆｅ
からなるアモルファス合金粉末を作製し、これを５５０
℃で１時間熱処理し、１００ｎｍ以下のｂｃｃＦｅの微
細結晶でなるナノ結晶粉末を得た。次いで、ポリエチレ
ン樹脂と樹脂の８．５倍の重量を有すナノ結晶粉末を混
合した。さらにこれを導体の周囲に押出成形によりチュ
ーブ状に成形し、図１に示すようなケーブルを得た。こ
のケーブルに被覆材なしの状態で１０ｍＧの磁界を発生
するように、周波数５０Ｈｚの電流を流し、被覆材あり
の状態での漏洩磁束をガウスメーターにて測定した。(Example 1) An average particle diameter of 20 μm was obtained by a water atomizing method.
Of Cu 1 -Nb 3 -Si 13.5 -B 9 (at%), the balance Fe
An amorphous alloy powder consisting of
C. for 1 hour to obtain a nanocrystalline powder composed of fine crystals of bccFe of 100 nm or less. Next, a polyethylene resin and a nanocrystalline powder having a weight 8.5 times that of the resin were mixed. Further, this was formed into a tube shape by extrusion molding around the conductor to obtain a cable as shown in FIG. A current having a frequency of 50 Hz was passed through the cable so as to generate a magnetic field of 10 mG without the covering material, and the leakage magnetic flux with the covering material was measured with a Gauss meter.
【００１１】また、比較品として平均粒径３０μｍのＰ
Ｃパーマロイも合金粉末を用いて、同様のケーブルを作
製し、被覆なしの状態で同様の磁界を発生するように、
周波数５０Ｈｚで通電し、被覆材ありの状態での漏洩磁
束を測定した。その結果、本発明品は３．１ｍＧまで減
少した。これに対し比較品は６．７ｍＧであった。この
結果から明らかなように、本発明のナノ結晶合金粉末を
用いたケーブルは、より漏洩磁束の少ないものとなっ
た。As a comparative product, P having an average particle size of 30 μm was used.
C permalloy also made a similar cable using alloy powder, and generated a similar magnetic field without coating,
Electric current was applied at a frequency of 50 Hz, and the leakage magnetic flux with the covering material was measured. As a result, the product of the present invention decreased to 3.1 mG. On the other hand, the comparative product was 6.7 mG. As is clear from these results, the cable using the nanocrystalline alloy powder of the present invention has a smaller leakage magnetic flux.
【００１２】（実施例２）水アトマイズ法により平均粒
径２０μｍのＣｕ1−Ｚｒ3.5−Ｎｂ3.5−Ｂ6（ａｔ
％）、残部Ｆｅからなるアモルファス合金粉末を作製
し、これを６００℃で１時間熱処理し、１００ｎｍ以下
のｂｃｃＦｅの微細結晶でなるナノ結晶粉末を得た。次
いで、耐熱性樹脂と樹脂の６倍の重量を有す粉末を混合
した。さらにこれを導体の周囲に押出成形によりチュー
ブ状に成形し、直径２ｍｍのケーブルを得た。このケー
ブルに被覆材なしの状態で１０ｍＧの磁界を発生するよ
うに、周波数５０Ｈｚの電流を流し、被覆材ありの状態
での漏洩磁束をガウスメーターにて測定した。[0012] (Example 2) Cu 1 -Zr an average particle size of 20μm by the water atomizing method 3.5 -Nb 3.5 -B 6 (at
%) And an amorphous alloy powder composed of the balance Fe was prepared and heat-treated at 600 ° C. for 1 hour to obtain a nanocrystalline powder composed of bccFe fine crystals of 100 nm or less. Next, a heat-resistant resin and a powder having a weight six times that of the resin were mixed. Further, this was formed into a tube shape by extrusion molding around the conductor to obtain a cable having a diameter of 2 mm. A current having a frequency of 50 Hz was passed through the cable so as to generate a magnetic field of 10 mG without the covering material, and the leakage magnetic flux with the covering material was measured with a Gauss meter.
【００１３】また、比較品として平均粒径２０μｍのＦ
ｅ2−Ｍｎ2−Ｃｒ3−Ｓｉ13−Ｂ9（ａｔ％）、残部Ｃｏ
からなるアモルファス合金粉末を用いて、同様のケーブ
ルを作製し、被覆なしの状態で同様の磁界を発生するよ
うに、周波数５０Ｈｚで通電し、被覆材ありの状態での
漏洩磁束を測定した。その結果、本発明品は３．８ｍＧ
まで減少した。これに対し比較品は４．３ｍＧであっ
た。さらに上記２種類のケーブルを１００℃で５００時
間保持した後の漏洩磁束も測定した。その結果、ナノ結
晶粉末を用いたものは漏洩磁束の変化が１％未満であっ
た。しかし、比較品の漏洩磁束は８．９ｍＧと約５０％
特性が劣化した。この結果から明らかなように、本発明
のナノ結晶合金粉末を用いたケーブルは、より漏洩磁束
および経時変化が少ないものとなった。As a comparative product, F having an average particle diameter of 20 μm was used.
e 2 -Mn 2 -Cr 3 -Si 13 -B 9 (at%), balance Co
A similar cable was produced using an amorphous alloy powder composed of the following, and a current was applied at a frequency of 50 Hz so as to generate a similar magnetic field without a coating, and the leakage magnetic flux with the coating was measured. As a result, the product of the present invention was 3.8 mG
Down to. On the other hand, the comparative product was 4.3 mG. Furthermore, the leakage magnetic flux after holding the two types of cables at 100 ° C. for 500 hours was also measured. As a result, in the case of using the nanocrystalline powder, the change in leakage magnetic flux was less than 1%. However, the leakage flux of the comparative product was 8.9 mG, about 50%.
The characteristics have deteriorated. As is clear from the results, the cable using the nanocrystalline alloy powder of the present invention has less leakage magnetic flux and less change with time.
【００１４】[0014]
【発明の効果】本発明によれば、ナノ結晶磁性粉末を樹
脂と混合し、導体周囲にチューブ状に被覆することで、
磁気シールド効果に優れる新しい構成のケーブルを提供
することができる。According to the present invention, a nanocrystalline magnetic powder is mixed with a resin, and is coated in a tubular shape around a conductor.
It is possible to provide a cable having a new configuration that is excellent in a magnetic shielding effect.
【図１】本発明のケーブルの構成を示す断面模式図であ
る。FIG. 1 is a schematic sectional view showing a configuration of a cable of the present invention.
Claims (3)
ブルであって、前記樹脂内部にはナノ結晶磁性粉末が分
散していることを特徴とするケーブル。1. A cable comprising a conductor and a resin covering the conductor, wherein a nanocrystalline magnetic powder is dispersed in the resin.
態を有し、また樹脂に含まれるナノ結晶磁性粉末が、樹
脂の重量の１５倍以下含有されていることを特徴とする
請求項１に記載のケーブル。2. The resin coated on the conductor has a tubular form, and the nanocrystalline magnetic powder contained in the resin is contained in an amount of not more than 15 times the weight of the resin. Cable described in.
性粉末を有する請求項１または２に記載のケーブル。3. The cable according to claim 1, comprising a nanocrystalline magnetic powder having an average particle diameter of 500 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24567497A JPH1186641A (en) | 1997-09-10 | 1997-09-10 | Cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24567497A JPH1186641A (en) | 1997-09-10 | 1997-09-10 | Cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1186641A true JPH1186641A (en) | 1999-03-30 |
Family
ID=17137134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24567497A Pending JPH1186641A (en) | 1997-09-10 | 1997-09-10 | Cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1186641A (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6506972B1 (en) * | 2002-01-22 | 2003-01-14 | Nanoset, Llc | Magnetically shielded conductor |
| EP1476882A2 (en) * | 2002-01-22 | 2004-11-17 | Nanoset, LLC | Nanomagnetically shielded substrate |
| WO2005045853A1 (en) * | 2003-11-07 | 2005-05-19 | Abb Research Ltd. | System for transmission of electric power |
| US7067022B2 (en) | 2000-11-09 | 2006-06-27 | Battelle Energy Alliance, Llc | Method for protecting a surface |
| CN1302486C (en) * | 2003-09-15 | 2007-02-28 | 北京大学 | Conducting polymer carbon nanotube nano cable and preparation method thereof |
| WO2008100839A1 (en) * | 2007-02-14 | 2008-08-21 | Medtronic, Inc. | Discontinuous conductive filler polymer-matrix composites for electromagnetic shielding |
| US8989840B2 (en) | 2004-03-30 | 2015-03-24 | Medtronic, Inc. | Lead electrode for use in an MRI-safe implantable medical device |
| US9155877B2 (en) | 2004-03-30 | 2015-10-13 | Medtronic, Inc. | Lead electrode for use in an MRI-safe implantable medical device |
| JP2015192034A (en) * | 2014-03-28 | 2015-11-02 | 日立金属株式会社 | Magnetic shield structure of power line for transmission and distribution, and power transmission and reception facility using the same |
| US9186499B2 (en) | 2009-04-30 | 2015-11-17 | Medtronic, Inc. | Grounding of a shield within an implantable medical lead |
| US9259572B2 (en) | 2007-04-25 | 2016-02-16 | Medtronic, Inc. | Lead or lead extension having a conductive body and conductive body contact |
| US9302101B2 (en) | 2004-03-30 | 2016-04-05 | Medtronic, Inc. | MRI-safe implantable lead |
| US9463317B2 (en) | 2012-04-19 | 2016-10-11 | Medtronic, Inc. | Paired medical lead bodies with braided conductive shields having different physical parameter values |
| KR20160118939A (en) | 2015-04-02 | 2016-10-12 | 히타치 긴조쿠 가부시키가이샤 | Magnetic shield wire and manufacturing method thereof, as well as magnetic shield braid sleeve and magnetic shield cable using the same |
| US9731119B2 (en) | 2008-03-12 | 2017-08-15 | Medtronic, Inc. | System and method for implantable medical device lead shielding |
| US9993638B2 (en) | 2013-12-14 | 2018-06-12 | Medtronic, Inc. | Devices, systems and methods to reduce coupling of a shield and a conductor within an implantable medical lead |
| US10084250B2 (en) | 2005-02-01 | 2018-09-25 | Medtronic, Inc. | Extensible implantable medical lead |
| US10155111B2 (en) | 2014-07-24 | 2018-12-18 | Medtronic, Inc. | Methods of shielding implantable medical leads and implantable medical lead extensions |
| US10279171B2 (en) | 2014-07-23 | 2019-05-07 | Medtronic, Inc. | Methods of shielding implantable medical leads and implantable medical lead extensions |
| US10537730B2 (en) | 2007-02-14 | 2020-01-21 | Medtronic, Inc. | Continuous conductive materials for electromagnetic shielding |
| WO2022190851A1 (en) * | 2021-03-08 | 2022-09-15 | 株式会社オートネットワーク技術研究所 | Electric wire for communication |
| DE112020006323T5 (en) | 2019-12-25 | 2022-10-06 | Autonetworks Technologies, Ltd. | communication cable |
-
1997
- 1997-09-10 JP JP24567497A patent/JPH1186641A/en active Pending
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7067022B2 (en) | 2000-11-09 | 2006-06-27 | Battelle Energy Alliance, Llc | Method for protecting a surface |
| EP1476882A2 (en) * | 2002-01-22 | 2004-11-17 | Nanoset, LLC | Nanomagnetically shielded substrate |
| EP1476882A4 (en) * | 2002-01-22 | 2007-01-17 | Nanoset Llc | Nanomagnetically shielded substrate |
| US6506972B1 (en) * | 2002-01-22 | 2003-01-14 | Nanoset, Llc | Magnetically shielded conductor |
| CN1302486C (en) * | 2003-09-15 | 2007-02-28 | 北京大学 | Conducting polymer carbon nanotube nano cable and preparation method thereof |
| WO2005045853A1 (en) * | 2003-11-07 | 2005-05-19 | Abb Research Ltd. | System for transmission of electric power |
| US9302101B2 (en) | 2004-03-30 | 2016-04-05 | Medtronic, Inc. | MRI-safe implantable lead |
| US8989840B2 (en) | 2004-03-30 | 2015-03-24 | Medtronic, Inc. | Lead electrode for use in an MRI-safe implantable medical device |
| US9155877B2 (en) | 2004-03-30 | 2015-10-13 | Medtronic, Inc. | Lead electrode for use in an MRI-safe implantable medical device |
| US10084250B2 (en) | 2005-02-01 | 2018-09-25 | Medtronic, Inc. | Extensible implantable medical lead |
| US9044593B2 (en) | 2007-02-14 | 2015-06-02 | Medtronic, Inc. | Discontinuous conductive filler polymer-matrix composites for electromagnetic shielding |
| US10537730B2 (en) | 2007-02-14 | 2020-01-21 | Medtronic, Inc. | Continuous conductive materials for electromagnetic shielding |
| US10398893B2 (en) | 2007-02-14 | 2019-09-03 | Medtronic, Inc. | Discontinuous conductive filler polymer-matrix composites for electromagnetic shielding |
| WO2008100839A1 (en) * | 2007-02-14 | 2008-08-21 | Medtronic, Inc. | Discontinuous conductive filler polymer-matrix composites for electromagnetic shielding |
| US9259572B2 (en) | 2007-04-25 | 2016-02-16 | Medtronic, Inc. | Lead or lead extension having a conductive body and conductive body contact |
| US9731119B2 (en) | 2008-03-12 | 2017-08-15 | Medtronic, Inc. | System and method for implantable medical device lead shielding |
| US9629998B2 (en) | 2009-04-30 | 2017-04-25 | Medtronics, Inc. | Establishing continuity between a shield within an implantable medical lead and a shield within an implantable lead extension |
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